Outboard Rough Idle

Yamaha Outboard engine stalls 4. If your outboard engine is sputtering at any speed, idle or full throttle, it could be the result of several common malfunctions. What bottom gear oil to use 1976 johnson 35 hp outboard what size fuel line fits a 1977 evinrude 35 hp outboard where is the thermostat location for a mercruiser 35 hp 1978 35 15 hp johnson manual 1959 johnson 35hp lower unit exploded view 1979 evinrude 35hp won t idle cold 1982 35hp johnson runs will not idle 1983 35hp evinrude motor firing and getting gas but wont crank 1980 evinrude. Even though it is straightforward, it may leave you feeling like you've spent a great deal of time standing on your head since the adjustments will require you to lean over the top of the motor for at least half the time it takes to. 5 seconds; Noise (idle/cruise/top): 68/79/89dB(A) Weight: 25kg; Warranty: 5 years; Contact: www. If I disconnect the number one spark plug wire, the engine will stabilize and idle on two cylinders. Motor will not. mercury 5 hp outboard runs rough and stalls; mercury 5 hp outboard rpm idle tuneing; mercury 5 hp two stroke 1999 transom height; 2011 suzuki df5 handbook; suzuki df5 handbuch; suzuki df5 impeller replacement; checking timing on a suzuki df50; is a 1991 suzuki dt5y a 2 stroke engine; suzuki dt5y outboard throttle rpm speed range 4500-5000. 1999 honda bf25 high rev no power above idle ; Honda 100 wonbt go forward; Honda 225 losing RPMs; Trolling low idle with BF200HP; Honda B100 outboard 4 stroke near 1990; 2008 Honda fuel lines; H99 starts great idles great stops after 5 mins hard to restart; 1999 Honda Bf40a Water in exhaust Steam; What year 75 4 stroke; Honda BF130 2000 Blown. 8hp mercury outboard 1991 9. 9 hp 4 stroke; set idle mixture screws on 2003 mecury 9. Many things can affect idle quality. Engine is under warranty but would like to resolve this myself if it's. Grow your YouTube views, likes and subscribers for free. Top tips from one of Suzuki's expert engineers, focussing on possible causes of your large horsepower/performance outboard running rough and how to maintain. When I got it to run it seemed to run okay at wot but when I throttled down. Hello, just joined and first post as I am troubleshooting a frustrating idle issue. Outboard engine will not stop 6. If your outboard engine is sputtering at any speed, idle or full throttle, it could be the result of several common malfunctions. Outboard-Boat-Motor-Repair. Will cause rough running, especially at idle. Before taking your 115 HP outboard engine in for service, there are a few basic troubleshooting steps you can do on your own. Engine Idle Is Too Low Or Stalls Dirty Throttle Body. I also get a lot of hesitation and studdering when I increase throttle. Fuel Pump For Yamaha Outboard Boat 2 Stroke V4 (Fits: Yamaha TJRS Outboard) Clymer Yamaha HP 2-Stroke Outboards & Jet Drives Service Manual. What can cause rough idle on 1999 Tahoe? A vacuum leak, a bad injector and if the check engine light is on, check the codes. Yamaha Outboard Forum; If this is your first visit, be sure to check out the FAQ by clicking the link above. 30 hp johnson outboard rough low idling. Personally, my '16 Silverado had a slight rough idle when sitting at red lights while the transmission is in drive. 8 hp 2 stroke outboard motors; 8 hp evinrude idle problems; 8 hp evinrude not idling problems; 8 hp mercury outboard; 8 hp mercury outboard oil change; 8 hp johnson outboard 1995 rough running; 8 hp johnson outboard wont start; 8 hp mariner outboard won't idle; 8 hp mercury 1992 fuel oil ratio; 8 hp mercury 2 stroke specs; 8 hp mercury motor manual. Engine has a rough idle 3. It wasn't until after WWII that recreational boating became popular. It sat for 3-4 years without any use, but otherwise was maintained very well and shows no signs of abuse. When an outboard motor runs at speed but cannot hold an idle, it usually indicates a problem with the carburetor. 2004 f150 rough idle installed new plugs, and ethenal free high octane gas , also tried fuel injector cleaner. 9 hp; set timing on 2004 suzuki 9. Engine has poor performance, bogging, hesitation, backfires etc. In this case, the idle will have to be adjusted manually to ensure that your boat continues to operate. 9 hp motor gearbox oil 1995 mercury outboard motor youtube review 9hp mercury outboard running rough mercury 9. I have a 2008 20 hp four stroke Tohatsu outboard on my jon boat. Fuel Pump For Yamaha Outboard Boat 2 Stroke V4 (Fits: Yamaha TJRS Outboard) Clymer Yamaha HP 2-Stroke Outboards & Jet Drives Service Manual. Engine ran a little rough at idle, hardly noticeable, and would stall when going from full throttle to idle and vice versa. Suzuki df50 idles rough Suzuki df40 high speed idle screw adjustment yamaha f60 tlr youtube turn idle mixture needle changing gear lube in a 1987 johnson 150 hp outboard motor 1988 suzuki df70 hp piston to cyclinder wall clearance suzuki df5 wont start idle air control 1988 suzuki df9. When a vehicle begins to idle rough or stall, the idle system requires service. For example valves bad, or weak, ignition, plugs points, or distributor. Once warm, it seems to do fine the rest of the day. Big Jon Honda 5hp Outboard Shop Outboards. It seems to happen at every trip. Hi All, I have a 2003 Camry 4 cylinder. That is, I go back down to idle but I can tell the RPMs are still falling off and not fully back into a true idle. 0l tks fuel mixture adjustment how to change valves on a 1996 80hp mercury 2 stroke out board 2004 mercruiser 350 mag mpi tow sports work shop manual johnson 40 hp outboard fuel pump idle speed control 25 hp yamaha outboard electric start won't fire how to check. It restarts but will die almost immediately after shifting to reverse. I have a 2003 Honda 225 serial number BagJ-11008xx that runs like garbage at idle and lower rpm situations. When left to idle in Park or Neutral the roughness would usually lead to the engine stalling after a few minutes. It started peeing right away and ran a little rough. I am not a marine engine mechanic but this is a fix that. The engine is running rough, either just at idle or also during acceleration. Blue smoke trailing from motor when I start it, much more prevalent than before. [At] higher [engine speed] it runs fine. When an outboard motor runs at speed but cannot hold an idle, it usually indicates a problem with the carburetor. Engine has poor performance, bogging, hesitation, backfires etc. I have a 2000 40hp mercury remote 2 stroke outboard motor that will not idle in neutral. The only tools n. FIXED my rough Idle + stall problem 900 -2000 RPM running hot 60HP EFI Mercury Outboard 2005 Four stroke engine! The engine starts fine and after runing for. It runs good at higher rpms but wen I want to shift it into gear it always stalls. Spark plug/spark plug wires. 1986 johnson 70 hp outboard rough idle; 1989 70 hp mercury lower unit plugs; 1989 70 hp mercury outboard hesitation at lower end; 1990 70hp evinrude idles ruff; 1990 70hp evinrude motor not turning over; 1990 evinrud 70 idle; 1992 evinrude 70 hp motor starter; 1991 evinrude 70 hp wont start in neutral. May 14, 2018 Title 29 Labor Parts 1911 to 1925 Revised as of July 1, 2019 Containing a codification of documents of general applicability and future effect As of July 1, 2019. For a while it barely would run at all at any level of throttle as it seemed to surge and would eventually die. When it comes to adjusting the idle state on Johnson Outboard motors, the part involved would most definitely have to be the Carburetor. Yamaha Outboard is overheating, overheats over heats, running hot 8. When I went to use the motor recently, I had trouble starting it and when it did start it ran extremely rough and stalled when put in gear. 1985 mercury 90hp outboard idle mixture screws. This is a good example of how basic engine diagnostic tests can work to pinpoint the root cause of the cars problem. The slow-speed idle adjustment screw, also referred to as the low-speed needle, is located near the front of the outboard motor carburetor. Some repair procedures in this Suzuki 115 hp outboard downloadable manual may require the use of special tools. Spark plug/spark plug wires. Back Boat 125hp force runs rough at low speed and dies at idle. 84' Mercury 2. Compression check gave the following results: Cyl. It became very unstable at idle and low throttle - sputtering and stalling unless I give it a little gas. Sportsmen used these gear driven outboards to haul themselves and their gear long before shallow water boat motors came into the market, and the majority of them still do. Under power above 1000rpm, it seems to run fine, but anything below that, it simply will not idle and sounds like its not running on all cylinders, almost like a misfire. Your Yamaha outboard is an essential part of your boating experience. Dirty Fuel Injector Modern vehicles are fitted with fuel injection systems, which inject fuel into the cylinders to create a mix of air and fuel to burn. It sat for 3-4 years without any use, but otherwise was maintained very well and shows no signs of abuse. The problem we are having is the car has a slight rough idle only at cold start. Yamaha Outboard 115HP 115 HP Service Manual 1996-2006. This engine is brand new and has never been started. Big Jon Honda 5hp Outboard Shop Outboards. Battery was low enough I had to jump across from a trolling motor battery. Sometimes after starting and running for a while, then sailing, it would not want to start. I put the boat in today to take it for a ride, when I started it up the motor sounded perfect but when I put it in gear the motor seemed to run rough and got alot noiser when idling. 193): thanks Wrenchin i didnt think of a remote tank and will try that. Thank you for any help or ideas you can offer! I have two 2010 DF90As and earlier in the fall the stbd motor started to develop a low, rough sounding idle, but the tach would still read the normal 500-600RPMs. My optimax runs great at anything above idle (idle in neutral, idle in gear, forward or reverse). I have had it out three times this year. It's also very rough if driven under 2000rpm. If the rough idle continues, proceed to Step 2. Battery was low enough I had to jump across from a trolling motor battery. Drivers of direct-injected gasoline engines have been complaining about a rough idle and a check engine light that has been illuminating on the dash. Suzuki df 25 mounting instructions suzuki df 25 outboard transom bracket suzuki df 25 instructieboek suzuki df 25 owner’s crankshaft removal operating temperature suzuki df25 thermostat replacement suzuki df25 impeller replacement instructions suzuki df25 user manual 2002 suzuki df25 online manual suzuki df25 outboard wiring diagrams suzuki. So you figure your are doubling the size of the foils you are going to get some feedback but it is really smooth. This is basically what powers up your outboard motor and therefore, has to be. 0T Just passed 100K miles. Under the bonnet there sounds to be a vacuum leak. Sometimes after starting and running for a while, then sailing, it would not want to start. I have a 1996 Johnson 90 V4 VRO outboard. I have only run 93 octane Valvetec marine fuel since new. After she warms up she is smooth as glass. i guess if the remote tank dont fix it i will throw in a new pump as the diaphragm isnt but like 20 bucks. My optimax runs great at anything above idle (idle in neutral, idle in gear, forward or reverse). For more information, visit us or call 888-889-7311. It has no power and hold it at full throttle runs for 10 seconds and starts to buzz and goes into limo mode. mercury 5 hp outboard runs rough and stalls; mercury 5 hp outboard rpm idle tuneing; mercury 5 hp two stroke 1999 transom height; 2011 suzuki df5 handbook; suzuki df5 handbuch; suzuki df5 impeller replacement; checking timing on a suzuki df50; is a 1991 suzuki dt5y a 2 stroke engine; suzuki dt5y outboard throttle rpm speed range 4500-5000. When idle speed changes significantly or stalling on throttle release occurs, a problem is indicated. My outboard engine on my pontoon starts but idles rough and as I back out of the slip it dies. I have a 40 HP Merc 2 Cyl. Without it, you’re not going to get too far. We help you save hundreds and sometimes thousands of dollars on outboard motors, powerheads, lower units, outdrives, gear cases and more!. Longer warm up doesn't seem to help. Sometimes after starting and running for a while, then sailing, it would not want to start. Welcome to the Internet's premier site for boat motors!This site is part of iboats. The powed was down about 25% from normal. I have encountered a rough idle condition on just about every vehicle from a Ford F150 or a Jeep Cherokee all of the way to a Geo metro. 3 horsepower Mercury, Mariner, Yamaha, Suzuki, Johnson and Evinrude outboard engine repair manual delivered straight to your computer in seconds and fix your problem now. Thank you for any help or ideas you can offer! I have two 2010 DF90As and earlier in the fall the stbd motor started to develop a low, rough sounding idle, but the tach would still read the normal 500-600RPMs. Hi All, I have a 2003 Camry 4 cylinder. Remove all six spark plugs, keeping them in order, 1-6. Hey Guys, just recently, my 2008 Mercury 2-Stroke 3 cylinder outboard motor starting smoking heavily at idle (neutral position). 10/13/15 @ 8:49 PM. 9 carburetor 2004 mercury 9. When it comes to adjusting the idle state on Johnson Outboard motors, the part involved would most definitely have to be the Carburetor. Spark plugs create the spark that is needed for your car to burn fuel. I have been having trouble keeping it running at idle. C40TLRV, 1997 40 hp 3 cyl 2 stroke. The sun just broke the horizon, but your day began hours ago—the second you started your trusty Yamaha Portable. Hi, I have a 2001 Yamaha 40hp 2 stroke that will not idle. idle screw on 35 hp mercury outboard; how to set idle rpm on a 35 hp johnson; greasing johnson 35 hp; high sensor johnson outboard 35 hp; evinrude 35 hp idle ok running rough; evinrude 35 hp model 35753c overheating; evinrude outboard 35 hp 1992 model; evinrude outboard 35 hp hard starting; adjusting idle on 35 hp johnson outboard. I let it run for a bit longer and seemed to run a bit better but still idling rough. When an outboard motor runs at speed but cannot hold an idle, it usually indicates a problem with the carburetor. # 2 - 150, Cyl. I understand that it cuts out some cylinders at slow speeds, but do not know which ones. Price: £936; Top speed: 5. For example valves bad, or weak, ignition, plugs points, or distributor. Search For Search. On later model vehicles, a check engine light may accompany the issue. , alleging that the company's DF300 outboard overheats, causing safety concerns and shortening the life of the engine, according to court documents. This adjustment should result in a true approximate setting. Used more in winter. I bought a boat with a 2001 90hp mercury 2 stroke on friday. mercury optimax rough idle 90hp. When an outboard motor runs at speed but cannot hold an idle, it usually indicates a problem with the carburetor. You may have to register before you can post: click the register link above to proceed. I know it only takes a few drops to look like a lot, but it was quite an area. mercury 70 hp idle issues kennebunkport maine; mercury 70 hp outboard rough idle; mercury 70 hp outboard set idle mixture; removing head cover yamaha 70 2 stroke outboard; suzuki 70df 2008 4 stroke beeps codes; yamaha 70 two stroke spark plugs; yamaha 70hp 2 stroke 3 cylinder repair manual; yamaha 70hp 2 stroke cylinder head block. The only check valve in an Outboard fuel system should be the one located in the primer ball. A rough engine idle or stalling is a common complaint, but in some cases can be difficult to resolve. It wasn't until after WWII that recreational boating became popular. The carbs have been serviced 2 times in the last year. So you figure your are doubling the size of the foils you are going to get some feedback but it is really smooth. From brand new, (I pulled it out of the box and rigged it) it had a rough spot in a certain RPM range. Last season I had a problem with my 1989 Yamaha 9. I also get a lot of hesitation and studdering when I increase throttle. Mercury outboard rough idle. 9 hp mercury wiring diagram mercury 9. 9hp Honda 4-Stroke Short Shaft 15" outboard boat motor. Yamaha 8HP Portable Four Stroke. Over the last two years or so the van had developed a rough idle issue. I had a rough idle to the point that the motor would not stay running. Also, it's more difficult to start ---- 3-4 cranks versus one when I did not have this problem. You may need to make a few timing adjustments or replace a spark plug, or you may need serious mechanical inquiry. Once warm, it seems to do fine the rest of the day. Hi, I have a 2001 Yamaha 40hp 2 stroke that will not idle. 0T TSI Misfires and rough idle 01-28-2019 10:45 AM #1. The F115, F90 and F75 feature Yamaha’s Variable Trolling RPM Switch (VTS®). Most users ever online was 477 at 01:34 AM on 01-14-2020. 1999 honda bf25 high rev no power above idle ; Honda 100 wonbt go forward; Honda 225 losing RPMs; Trolling low idle with BF200HP; Honda B100 outboard 4 stroke near 1990; 2008 Honda fuel lines; H99 starts great idles great stops after 5 mins hard to restart; 1999 Honda Bf40a Water in exhaust Steam; What year 75 4 stroke; Honda BF130 2000 Blown. Once it get it out of the slip and going forward {sommetimes dies shifting to forward also} it seems to run fine. It was won in a raffle drawing by a local dealer on 12/19/2016. Hi, I own a 07 115 evinrude etec that has been acting up lately. Dirty Fuel Injector Modern vehicles are fitted with fuel injection systems, which inject fuel into the cylinders to create a mix of air and fuel to burn. Hence, after knowing the ways to troubleshoot rough idle when warm problem, anyone. That is, I go back down to idle but I can tell the RPMs are still falling off and not fully back into a true idle. Engine ran a little rough at idle, hardly noticeable, and would stall when going from full throttle to idle and vice versa. Faulty Idle Bleed Recirculation System: Usually, a clogged or stuck check valve, or clogged or leaking hose. # 2 - 150, Cyl. New plugs and injectors cleaned and tested. 95 shipping available. 0 members and 22 guests. 5: 1987-1990: Outboard Carburetor Kit - 439071: 3. If the rough idle continues, proceed to Step 2. Offering discount prices on OEM parts for over 50 years. 9 4-stroke I bought with my Mac 26D 3 years ago. Longer warm up doesn't seem to help. ($1800) I feel like i have been ripped off but can not p …. 3 horsepower Mercury, Mariner, Yamaha, Suzuki, Johnson and Evinrude outboard engine repair manual delivered straight to your computer in seconds and fix your problem now. 1961 60 hp evinrude high idle; 1962 60 hp evinrude idle speed screw; 1963 60 hp evinrude map sensor; 1964 60 hp evinrude outboard is running rough; 1965 60 hp evinrude outboard motor wont start; 1966 60 hp evinrude outboard wont crank; 1967 60 hp evinrude overheat slow; 1968 60 hp evinrude overheats; 1969 60 hp evinrude won't start. This engine has a 5 year warranty which runs until 12/19/2021. Consult your owner's manual to check items that may be unique to your motor. Offering discount prices on OEM Johnson/Evinrude, OMC parts for over 50 years. I have a 2001 Mercury 125 hp EXLPTO outboard. Big Jon Honda 5hp Outboard Shop Outboards. It has been starting rough and stalling a lot at idle and when I put it into gear. For people who wish to repair and/or restore outboard boat motors. It is a beep ,beep , beep warning. Yamaha 8HP Portable Four Stroke. Mercury Outboard Idle Speed Control 87076a9. These engines have a history of piston failure, usually no. On later model vehicles, a check engine light may accompany the issue. 1985 mercury 90hp outboard idle mixture screws. Step 2 – Clean the throttle body and MAF. The 80 hp Mercury outboard is difficult to start and when started it idles at high rpms. Probably too many to mention. I have a honda bf150 Idles rough and cut out when revs drop back to idle. On this page we after going to be discussing some different things that can cause your rough idling condition. It's also very rough if driven under 2000rpm. At the lowest idle, it dies down and sometimes shuts off. Let me use an idle complaint that had me on the ropes as an example. Re: Root cause of Mercury 2-strokes' rough idle Rough idle is a subjective statement. Outboard motor runs but dies when put in gear. I have only run 93 octane Valvetec marine fuel since new. Yesterday with new plugs it ran rough at idle but fine at higher RPMs. After she warms up she is smooth as glass. Compression check gave the following results: Cyl. what about vst filter? where is. There where several advancements from 1969-1974 in Evinrudes, related to fuel/ignition/gear case design/thru prop exhaust, so the exact year might be helpful. 9; rough idle 2013 suzuki thl 9. Personally, my '16 Silverado had a slight rough idle when sitting at red lights while the transmission is in drive. It was won in a raffle drawing by a local dealer on 12/19/2016. I have a 2000 40hp mercury remote 2 stroke outboard motor that will not idle in neutral. I completed the repair on my mercury and it was exactly as expected. Yamaha Outboard 1995-2004 All 4-stroke 1-6cyl Repair Manual. 9 hp engine idle mixture screw; sherly 2006 suzuki 4 stroke outboard oil filter. Hi, I have a 2001 Yamaha 40hp 2 stroke that will not idle. This adjustment should result in a true approximate setting. Consult your owner's manual to check items that may be unique to your motor. 9 seahorse ignition diagram 1986 mariner 9. At first, only I would notice the rough idle. ? I have a 2000 25hp 4 stroke Mercury Bigfoot that was recently purchased with the boat. This past weekend while fishing the LSR Challenge, my main engine started running rough while trolling. A misfire will cause the engine to momentarily stumble or lose rpms and then regain its normal engine speed. I looking for help with my 40 hp 2004 model honda tiller steer. [At] higher [engine speed] it runs fine. If it is not correct, you may have to adjust the idle stop screw. 1986 johnson 70 hp outboard rough idle; 1989 70 hp mercury lower unit plugs; 1989 70 hp mercury outboard hesitation at lower end; 1990 70hp evinrude idles ruff; 1990 70hp evinrude motor not turning over; 1990 evinrud 70 idle; 1992 evinrude 70 hp motor starter; 1991 evinrude 70 hp wont start in neutral. Engine has a rough idle 3. You could also get a rough idea on the number of ppr by hooking up an oscilloscope to your tachometer wire and doing some calculation with your estimated idle rpms. The RPMs would hover a notch below 500 and when the rough idle would kick in, you could see the RPM needle jump up and down. # 3 - 145, Cyl. At the lowest idle, it dies down and sometimes shuts off. Seems like a misfire to me on above idle rpms, but I know little about engine mechanics. mercury optimax rough idle 90hp. Today out ran fine for about 15 mins and decided to start running rough while in idle and also running a bit rough while going 2600rpm. Smoother Trolling: Troll down to a heartbeat with the controll of Boyesen Power Reeds. I was getting the same 3-2 map sensor code. The problem we are having is the car has a slight rough idle only at cold start. Below are the four most common. These engines have a history of piston failure, usually no. Checked the Ignition system and repaired the problem. Lean to be Clean The carbureted Honda BF90 was tuned on the lean side at idle speed to keep it smooth and clean at trolling speeds, and also to help it meet emissions regulations. So, if you are trying to adjust the idle mixture and the idle is too high, you will get unpredictable results. Grow your YouTube views, likes and subscribers for free. On a test water hose it will shift in gear and continue running but on the lake it cuts off. A misfire may occur when your engine is idling, causing a rough or uneven idle. From sea level to 2,000 feet elevation all normal engines should show a vacuum reading between 17 to 21 inches. It restarts but will die almost immediately after shifting to reverse. Hi All, I have a 2003 Camry 4 cylinder. 8hp mercury outboard 1991 9. 9 4-stroke I bought with my Mac 26D 3 years ago. Thank you for any help or ideas you can offer! I have two 2010 DF90As and earlier in the fall the stbd motor started to develop a low, rough sounding idle, but the tach would still read the normal 500-600RPMs. Brought it home to do annual maintenance. Welcome to the Internet's premier site for boat motors!This site is part of iboats. What is the problem. I am not a marine engine mechanic but this is a fix that. When it comes to adjusting the idle state on Johnson Outboard motors, the part involved would most definitely have to be the Carburetor. 10/13/15 @ 8:49 PM. When I moored up, I saw a layer of fuel on the surface of the water. The issues appears to be with the number one cylinder. The motor idle nice and smooth out of gear in the water but in gear dead slow trolling it has a annoying sort of rough idle,if I put it out of gear give the throttle a rev and put back into gear it will run really smooth for about 10 seconds then start its rough idle again. The carb should be good. the rpms pick up instantly when the bulb is pumped i can fairly confindently say that isnt coincidence as it happened 30+ times over the course of a week and about 50 -75 miles of running. This happened both in and out of gear but only when the engine was still cold, idle returned to normal once normal op temp had been reached. From sea level to 2,000 feet elevation all normal engines should show a vacuum reading between 17 to 21 inches. I've been battling this problem for a couple of years and it has increasingly got worse. At first, only I would notice the rough idle. It helps in rough water too. If you have trouble starting the engine, remove the spark plug cover and using the wrench, remove the plug. Hi from Australia great forum heaps of good advice. A rough engine idle or stalling is a common complaint, but in some cases can be difficult to resolve. changing lower unit gear oil on johnson 6 hp outboard; 6 hp johnson outboard water outlets; 6 hp evinrude outboard motor that won't idle; 6 hp evinrude outboard motor won't start; 1994 mercury 6 hp outboard motor,2 stroke, pumping issue; 1980 6 hp johnson seahorse rough idle "1973 johnson 6 hp slow idle problem" +6 hp johnson swivel bracket removel. 9hp high rpms idle mercury 9. First time it ran okay, don't remember any problems. Engine ran a little rough at idle, hardly noticeable, and would stall when going from full throttle to idle and vice versa. I have a 1987 21 Enchanter with a 84' Mercury 2. These engines are experiencing a problem with carbon build-up on the top side of the intake valves. Hello, just joined and first post as I am troubleshooting a frustrating idle issue. The 80 hp Mercury outboard is difficult to start and when started it idles at high rpms. This is a major plus for anglers. Your Yamaha outboard is an essential part of your boating experience. I use it on a 200 merc outboard on a bass boat. 2006 Optimax Rough Idle Problem. There are other possibilities depending on the year. It started peeing right away and ran a little rough. This engine is brand new and has never been started. For example if you measure a 60hz freq. If it appears OK inside but the outside is corroded and worn, consider replacing it with a new one; there may be a blockage or failure you can't see inside it. To start viewing messages, select the forum that you want to visit from the selection below. My optimax runs great at anything above idle (idle in neutral, idle in gear, forward or reverse). 0T TSI Misfires and rough idle 01-28-2019 10:45 AM #1. 2 stroke outboard idles rough. Refer to the related article How to Clean Throttle Body to clean it. Hi, I own a 07 115 evinrude etec that has been acting up lately. What is the problem. The outboard marine mechanic should carefully read the text and become familiar with the Suzuki 115hp marine engine service manual procedures before beginning the work. 2004 f150 rough idle installed new plugs, and ethenal free high octane gas , also tried fuel injector cleaner. If you have trouble starting the engine, remove the spark plug cover and using the wrench, remove the plug. This past weekend while fishing the LSR Challenge, my main engine started running rough while trolling. This allows for precision adjustment of trolling speeds in 50-RPM increments, from 650 to 900 RPM for the 115 hp, and 550 to 1000 RPM for the 90 and 75 hp. Step 2 – Clean the throttle body and MAF. 1985 25 hp repair manual johnson 1986 25 hp rough idle johnson outboard motor 1987 25 hp manual free download johnson seahorse 1988 25 hp manual 1989 free johnson tracker 1990 25 hp hard to start when warm johnson tracker marine 1991 25 hp speciifications johson outboard 1992 25 hp maintenance tips jonhson outboard 1993 25 hp motor problems lower case drive unit schematic 2007 yamaha 1994 25. a225 mercury outboard a 4 stroke or 2; Adjust low idle on 95 60hp mercury outboard; adjusting a gear linkage on a mercury outboard; adjusting an outboard motor carburetor; adjusting idle on 1996 mariner 40 hp; adjusting mercury outboard oil pump; adjusting shift linkage on a 1997 40 hp mercury force outboard; Anything to worry about buying a. On a test water hose it will shift in gear and continue running but on the lake it cuts off. This is a major plus for anglers. These engines have a history of piston failure, usually no. Pro-Drive Outboards Are Gear Driven. 035, if those all check out, i would look into your timing. The automatic idle speed motor is common to most fuel injected vehicles. It has been starting rough and stalling a lot at idle and when I put it into gear. Longer warm up doesn't seem to help. It became very unstable at idle and low throttle - sputtering and stalling unless I give it a little gas. If I disconnect the number one spark plug wire, the engine will stabilize and idle on two cylinders. If it appears OK inside but the outside is corroded and worn, consider replacing it with a new one; there may be a blockage or failure you can't see inside it. From brand new, (I pulled it out of the box and rigged it) it had a rough spot in a certain RPM range. I bought a boat with a 2001 90hp mercury 2 stroke on friday. Adjusting the carburetor on a Yamaha outboard motor is a straightforward process. mercury 70 hp idle issues kennebunkport maine; mercury 70 hp outboard rough idle; mercury 70 hp outboard set idle mixture; removing head cover yamaha 70 2 stroke outboard; suzuki 70df 2008 4 stroke beeps codes; yamaha 70 two stroke spark plugs; yamaha 70hp 2 stroke 3 cylinder repair manual; yamaha 70hp 2 stroke cylinder head block. Price: £936; Top speed: 5. Outboard motor designs vary depending on make and model, but all operate on similar principles. Outboard motor runs but dies when put in gear. The one that we fear the most is uneven compression. The RPM range your having issues with is pretty much in between using the idle jets (part #6):. 8t Jetta (AWP) with the 5 speed auto transmission. Smoother Trolling: Troll down to a heartbeat with the controll of Boyesen Power Reeds. July 1, 2004 CODE OF FEDERAL REGULATIONS 29 Parts 1911 to 1925 Revised as of July 1, 2004 Labor Containing a codification of documents of general applicability and future effect As of July 1, 2004 With Ancillaries. The misfire will usually reappear, either under specific operating conditions or randomly. where is the fast idle switch on a 1992 50hp johnson outboard; evinrude 18 runs rough and is hard to start 1973 1990 Johnson Evinrude 2 to 40 HP Service. These engines have a history of piston failure, usually no. Tohatsu MFS5 outboard. The engine stalls in neutral, at idle, only. As with any other engine, this is the part which serves as the " combustion powerhouse" of every engine and works by blending air and fuel by employing the Bernoulli's Principle. For a while it barely would run at all at any level of throttle as it seemed to surge and would eventually die. 9 hp 2 stroke cold start problem. Hi from Australia great forum heaps of good advice. Consult your owner's manual to check items that may be unique to your motor. June 2011 in Boating #1. 2020 150hp 4 stroke outboard motors sale,Welcome to our website to purchase brand new and genuine 150 Yamaha F150,Suzuki DF150 and Honda BF150 boat engines with free shipping worldwide and factory price. idle screw on 35 hp mercury outboard; how to set idle rpm on a 35 hp johnson; greasing johnson 35 hp; high sensor johnson outboard 35 hp; evinrude 35 hp idle ok running rough; evinrude 35 hp model 35753c overheating; evinrude outboard 35 hp 1992 model; evinrude outboard 35 hp hard starting; adjusting idle on 35 hp johnson outboard. (looking at the back of the motor, the left bank is numbered top to bottom 1-3-5, the right bank is numbered 2-4-6. Built-In Flushing Attachments. It became very unstable at idle and low throttle - sputtering and stalling unless I give it a little gas. One day I’ll have a boat with no electronics/el. 9 pdf service manual 1993 9. Be careful though- engines with airbleed idle get richened by using smaller jets- and many of these motors use air bleeds depending on year and HP rating. Here is a seldom talked about solution to an outboard engine that is hard to start and idles poorly. Will cause rough running, especially at idle. My outboard engine on my pontoon starts but idles rough and as I back out of the slip it dies. When an outboard motor runs at speed but cannot hold an idle, it usually indicates a problem with the carburetor. Outboard Motors. Top tips from one of Suzuki's expert engineers, focussing on possible causes of your large horsepower/performance outboard running rough and how to maintain. Yamaha Outboard is overheating, overheats over heats, running hot 8. Step 2 – Clean the throttle body and MAF. The one that we fear the most is uneven compression. Even though it is straightforward, it may leave you feeling like you've spent a great deal of time standing on your head since the adjustments will require you to lean over the top of the motor for at least half the time it takes to. 9 4-stroke I bought with my Mac 26D 3 years ago. The motor will run but I need to manipulate the choke to keep it from stalling. This engine has a 5 year warranty which runs until 12/19/2021. Parts selection and shopping. If you have trouble starting the engine, remove the spark plug cover and using the wrench, remove the plug. Figured I'd share this since I've seen a good amount of people here complain about a rough idle. The reeds have considerably more torque off idle. Didn't investigate that much on water. 5 In Stock - Ships Immediately. 9hp Honda 4-Stroke Short Shaft 15" outboard boat motor. It turns over fine and has good spark. Longer warm up doesn't seem to help. This is a little odd. Back Boat 125hp force runs rough at low speed and dies at idle. # 2 - 150, Cyl. Fuel Pump For Yamaha Outboard Boat 2 Stroke V4 (Fits: Yamaha TJRS Outboard) Clymer Yamaha HP 2-Stroke Outboards & Jet Drives Service Manual. It is a small electric motor, controlled by the engine computer, which lets a measured about of air into the engine at idle (when the driver’s foot is not on the gas pedal), thereby controlling the idle speed. This is basically what powers up your outboard motor and therefore, has to be. Suzuki has gone on to earn a number of honors from the National Marine Manufacturers Association for outboard motor innovation. It will run on one cylinder, and 2 if I slow down to almost an idle (the one cylinder will almost plane the boat). C40TLRV, 1997 40 hp 3 cyl 2 stroke. If all is normal, 2-stroke idle is acceptable. Lots of throttle lag and lumpy idle. no change in performance, talked to two local yamaha dealers , said to try yamalube ring free fuel additive , runs worse now , seems like it is starving for fuel , slugish take off , slow top end. There are other possibilities depending on the year. I have a honda bf150 Idles rough and cut out when revs drop back to idle. Used more in winter. This adjustment should result in a true approximate setting. There where several advancements from 1969-1974 in Evinrudes, related to fuel/ignition/gear case design/thru prop exhaust, so the exact year might be helpful. Occasional misfire at idle. # 3 - 145, Cyl. Offering discount prices on OEM parts for over 50 years. The slow-speed idle adjustment screw, also referred to as the low-speed needle, is located near the front of the outboard motor carburetor. I had a rough idle to the point that the motor would not stay running. Last season I had a problem with my 1989 Yamaha 9. The motor idle nice and smooth out of gear in the water but in gear dead slow trolling it has a annoying sort of rough idle,if I put it out of gear give the throttle a rev and put back into gear it will run really smooth for about 10 seconds then start its rough idle again. 30 Day Exchange/Return Policy - Authorized. So, if you are trying to adjust the idle mixture and the idle is too high, you will get unpredictable results. Genuine Tohatsu Outboard Parts with fast responses, quick shipping. 5 / 2 / Junior: 1970-1990: Outboard Carburetor Kit - 439070: Ultra / Excel 4 + 2. 9 outboard idle problems mercury 9. Drivers of direct-injected gasoline engines have been complaining about a rough idle and a check engine light that has been illuminating on the dash. Many things can affect idle quality. 30 hp mercury 1995. Outboard motor runs but dies when put in gear. When I got it to run it seemed to run okay at wot but when I throttled down. Sometimes after starting and running for a while, then sailing, it would not want to start. I have a 1987 21 Enchanter with a 84' Mercury 2. June 2011 in Boating #1. It wasn't until after WWII that recreational boating became popular. Second time it ran rough at idle but fine at higher RPMs. i guess if the remote tank dont fix it i will throw in a new pump as the diaphragm isnt but like 20 bucks. Nobody makes a more reliable, powerful, and efficient lineup of outboard motors than Mercury: Verado, Pro XS, FourStroke, SeaPro, and Jet. Lean to be Clean The carbureted Honda BF90 was tuned on the lean side at idle speed to keep it smooth and clean at trolling speeds, and also to help it meet emissions regulations. Just like any of the other small maintenance chores, you can adjust the idle yourself with a minimum of fuss and tools. A misfire will cause the engine to momentarily stumble or lose rpms and then regain its normal engine speed. 1975 30hp yamaha fourstroke leg removal 1976 30hp yamaha outboard impeller 1977 30hp yamaha two stroke pull start assembly changing waterpump on a 1978 yamaha outboard 30hp 2 stroke compression for 30hp mercury converting a 1979 30hp mariner to electric start diagnostic troubleshooting 1980 30hp outboard motor diagram of choke for 1981 30hp 2003 yamaha download yamaha 30hp cv outboard manual. The only tools n. A downloadable Yamaha hp outboard motor repair manual, termed service manual, owner's manual or workshop manual, is a digitally transmitted book of repair. idle screw on 35 hp mercury outboard; how to set idle rpm on a 35 hp johnson; greasing johnson 35 hp; high sensor johnson outboard 35 hp; evinrude 35 hp idle ok running rough; evinrude 35 hp model 35753c overheating; evinrude outboard 35 hp 1992 model; evinrude outboard 35 hp hard starting; adjusting idle on 35 hp johnson outboard. A misfire may occur when your engine is idling, causing a rough or uneven idle. If I try to give it any gas, it just shuts down, like it isn't getting any gas. Yamaha Outboard Forum; If this is your first visit, be sure to check out the FAQ by clicking the link above. 5 In Stock - Ships Immediately. Rough idle yamaha 1973 6 hp outboard motor repair manual how to adjust idle on a honda 9. This allows for precision adjustment of trolling speeds in 50-RPM increments, from 650 to 900 RPM for the 115 hp, and 550 to 1000 RPM for the 90 and 75 hp. Mercury Outboard Parts. Before taking your 115 HP outboard engine in for service, there are a few basic troubleshooting steps you can do on your own. I changed the plugs after that trip. Hey Guys, I have been looking around and cannot seem to find the answer to my problem. Carb adjustment 1989 mercury pro hauler wiring diagram mercury 9. Once the idle speed is passed, the idle circuit is no longer in play. 9 hp suzuki outboard; setting suzuki 9. You may need to make a few timing adjustments or replace a spark plug, or you may need serious mechanical inquiry. Will cause rough running, especially at idle. We pit six of the best 5hp outboard engines against each other in a head-to-head group test on the Solent to find out which is best. I also get a lot of hesitation and studdering when I increase throttle. Without revving it, shut the motor. I have a 2000 40hp mercury remote 2 stroke outboard motor that will not idle in neutral. Compression check gave the following results: Cyl. 9; rough idle 2013 suzuki thl 9. 1999 honda bf25 high rev no power above idle ; Honda 100 wonbt go forward; Honda 225 losing RPMs; Trolling low idle with BF200HP; Honda B100 outboard 4 stroke near 1990; 2008 Honda fuel lines; H99 starts great idles great stops after 5 mins hard to restart; 1999 Honda Bf40a Water in exhaust Steam; What year 75 4 stroke; Honda BF130 2000 Blown. If I reattach the number one plug wire the engine will sputter and die. 0l tks fuel mixture adjustment how to change valves on a 1996 80hp mercury 2 stroke out board 2004 mercruiser 350 mag mpi tow sports work shop manual johnson 40 hp outboard fuel pump idle speed control 25 hp yamaha outboard electric start won't fire how to check. Blazing acceleration for that all-important holeshot. Checking the Idle Air Control Motor. From brand new, (I pulled it out of the box and rigged it) it had a rough spot in a certain RPM range. When it comes to adjusting the idle state on Johnson Outboard motors, the part involved would most definitely have to be the Carburetor. At first, only I would notice the rough idle. Engine ran a little rough at idle, hardly noticeable, and would stall when going from full throttle to idle and vice versa. To start viewing messages, select the forum that you want to visit from the selection below. Using a simple timing light and hooking it up to the #1 cylinder, I made the adjustment back to 0 and it purred like a kitten. This valve controls idle speed by regulating air intake, and when it. 9 hp 2 stroke cold start problem. 1996 mariner 25 hp compression test 1997 25 hp yamaha idles to low and stalls 1998 25 hp evinrude rough idle 1998 25 hp yamaha 4 stroke trim tilt manual lever image 1966 25 hp suzuki shifting linkage 1968 suzuki 25 hp temperature sensor 1972 suzuki dt25 25 hp outboard service manual 1971 yamaha 25 hp timing 2000 25 hp mercury outboard accelerator pump leaking fuel 2001 25 hp mercury outboard. 8 merc that just started running rough. This allows for precision adjustment of trolling speeds in 50-RPM increments, from 650 to 900 RPM for the 115 hp, and 550 to 1000 RPM for the 90 and 75 hp. 0 manual antifreeze mercruiser 3. The only check valve in an Outboard fuel system should be the one located in the primer ball. During the early 1950s, Carl Kiekaefer, a young engineer, started his career reselling refurbished outboards as a side job to support his inventions. 0 members and 22 guests. There where several advancements from 1969-1974 in Evinrudes, related to fuel/ignition/gear case design/thru prop exhaust, so the exact year might be helpful. 035, if those all check out, i would look into your timing. Your Yamaha outboard is an essential part of your boating experience. 1999 honda bf25 high rev no power above idle ; Honda 100 wonbt go forward; Honda 225 losing RPMs; Trolling low idle with BF200HP; Honda B100 outboard 4 stroke near 1990; 2008 Honda fuel lines; H99 starts great idles great stops after 5 mins hard to restart; 1999 Honda Bf40a Water in exhaust Steam; What year 75 4 stroke; Honda BF130 2000 Blown. We pit six of the best 5hp outboard engines against each other in a head-to-head group test on the Solent to find out which is best. I looking for help with my 40 hp 2004 model honda tiller steer. The center carb - passenger idle screw out 3 turns helped vacuum stay a solid 9. Big Jon Honda 5hp Outboard Shop Outboards. 95 shipping available. Two men in Alaska are suing American Suzuki Motor Corp. So, if you are trying to adjust the idle mixture and the idle is too high, you will get unpredictable results. Mercury Outboard Idle Speed Control 87076a9. 32 Mercury Marinemercruiser New Oem Valve-iac Idle Air Control 803149. This allows for precision adjustment of trolling speeds in 50-RPM increments, from 650 to 900 RPM for the 115 hp, and 550 to 1000 RPM for the 90 and 75 hp. Needed to be at 0 TDC, and it was off by a couple of degrees. At first, only I would notice the rough idle. A misfire will cause the engine to momentarily stumble or lose rpms and then regain its normal engine speed. On 4/18/2020 at 4:48 AM, Jud - s/v Sputnik said: Yes - I’ve resorted to black electrical tape on various LED “on” lights at home - small house and I hate waking up at night seeing them en route to the bathroom (still have bladder control, trust me). Throttling back to idle from there is no problem no matter how slowly I do it. From brand new, (I pulled it out of the box and rigged it) it had a rough spot in a certain RPM range. The motor will run but I need to manipulate the choke to keep it from stalling. If you have trouble starting the engine, remove the spark plug cover and using the wrench, remove the plug. Gear drives have been the proven choice for outboard motor manufacturers for over 100 years. Tip for diagnosis: let the engine idle rough for a while. When it comes to adjusting the idle state on Johnson Outboard motors, the part involved would most definitely have to be the Carburetor. The RPMs would hover a notch below 500 and when the rough idle would kick in, you could see the RPM needle jump up and down. The slow-speed idle adjustment screw, also referred to as the low-speed needle, is located near the front of the outboard motor carburetor. Alarm beeping on mercury efi 150 outboard. keypond Posts: 2,017 Captain. Today out ran fine for about 15 mins and decided to start running rough while in idle and also running a bit rough while going 2600rpm. How to connect a 1992 10hp mariner outboard board controls in video how to fix 3 1993 10hp mercury outboard no water how to fix mariner 1994 10hp oil fouled spark plug how to fix rough idle on a 1995 10hp Mercury outboard 10hp how to remove mercury prop how to remove mercury prop 10hp 1996 10hp Johnson outboard piston rings 1954 Johnson 1997 10hp four stroke out board motor service manual low. Yamaha Outboard 115HP 115 HP Service Manual 1996-2006. Start up engine and ensure the engine is idling properly (not backfiring, warmed up). Without revving it, shut the motor. [At] higher [engine speed] it runs fine. There are currently 22 users online. If all is normal, 2-stroke idle is acceptable. Used more in winter. Yamaha Outboard 1995-2004 All 4-stroke 1-6cyl Repair Manual. # 2 - 150, Cyl. 9 hp repair manual mercury outboard. the rpms pick up instantly when the bulb is pumped i can fairly confindently say that isnt coincidence as it happened 30+ times over the course of a week and about 50 -75 miles of running. When an outboard motor runs at speed but cannot hold an idle, it usually indicates a problem with the carburetor. The motor will run but I need to manipulate the choke to keep it from stalling. Idle air controller [has already been] changed, and [the spark] plugs [were] changed within 20 hours. 1983 mercury 35 hp Not rated yet I have 1983 mercury outboard 35hp, in idle speed will push the boat, but as soon i put it in full throttle it just rev up the motor and would not pushes … 2002 50 hp mercury runs slow but dies when trying to accelarate Not rated yet have a 2002 50 hp mercury outboard. So you figure your are doubling the size of the foils you are going to get some feedback but it is really smooth. Most often an input sensor has failed or the throttle body has a problem. Engine ran a little rough at idle, hardly noticeable, and would stall when going from full throttle to idle and vice versa. 9 hp; set timing on 2004 suzuki 9. The RPMs would hover a notch below 500 and when the rough idle would kick in, you could see the RPM needle jump up and down. Now it's painfully. This is a good example of how basic engine diagnostic tests can work to pinpoint the root cause of the cars problem. I bought a boat with a 2001 90hp mercury 2 stroke on friday. 0T TSI Misfires and rough idle 01-28-2019 10:45 AM #1. Outboard motor runs but dies when put in gear. Check the service manual for your particular. Johnson Outboard Parts Forum; If this is your first visit, When submerged at lake or in tub, hard to start, will not idle, and runs rough. Veteran Posts: 105 (75. tunes MEMBER since 5/25/08 PROFILE BLOCK USER. The RPMs would hover a notch below 500 and when the rough idle would kick in, you could see the RPM needle jump up and down. You could also get a rough idea on the number of ppr by hooking up an oscilloscope to your tachometer wire and doing some calculation with your estimated idle rpms. It was won in a raffle drawing by a local dealer on 12/19/2016. If all is normal, 2-stroke idle is acceptable. Everything with the ignition system seems to test ok and the carbs have been cleaned and nuthing seems to help. Built-In Flushing Attachments. Up to a 10% increase. 1991 mercury 175 outboard manual; 1990 johnson 175 hp idle problems; 1993 mercury 175 2 stroke outboard leg oil; 1993 mercury 175 runs rough at idle; 1994 mercury 175 outboard parts breakdown; 1995 evinrude 175 free repair manual downloads; 1996 175 evinrude fuel pours from exhaust; 1997 s175tr yamaha outboard service manual 2007 mercruiser 5. The automatic idle speed motor is common to most fuel injected vehicles. Continue to turn the idle mixture screw clockwise until the mixture becomes lean and the outboard motor begins to misfire (you'll notice the rpm's falling). Most users ever online was 477 at 01:34 AM on 01-14-2020. For a while it barely would run at all at any level of throttle as it seemed to surge and would eventually die. 2006 Optimax Rough Idle Problem. I have been having trouble keeping it running at idle. A downloadable Yamaha hp outboard motor repair manual, termed service manual, owner's manual or workshop manual, is a digitally transmitted book of repair. 2004 f150 rough idle installed new plugs, and ethenal free high octane gas , also tried fuel injector cleaner. 9 pdf service manual 1993 9. Let me use an idle complaint that had me on the ropes as an example. You may have to register before you can post: click the register link above to proceed. I looking for help with my 40 hp 2004 model honda tiller steer. How to connect a 1992 10hp mariner outboard board controls in video how to fix 3 1993 10hp mercury outboard no water how to fix mariner 1994 10hp oil fouled spark plug how to fix rough idle on a 1995 10hp Mercury outboard 10hp how to remove mercury prop how to remove mercury prop 10hp 1996 10hp Johnson outboard piston rings 1954 Johnson 1997 10hp four stroke out board motor service manual low. Second time it ran rough at idle but fine at higher RPMs. 0T Just passed 100K miles. Suzuki df50 idles rough Suzuki df40 high speed idle screw adjustment yamaha f60 tlr youtube turn idle mixture needle changing gear lube in a 1987 johnson 150 hp outboard motor 1988 suzuki df70 hp piston to cyclinder wall clearance suzuki df5 wont start idle air control 1988 suzuki df9. Outboard engine will not stop 6. 9 hp 4 stroke; set idle mixture screws on 2003 mecury 9. Even though it is straightforward, it may leave you feeling like you've spent a great deal of time standing on your head since the adjustments will require you to lean over the top of the motor for at least half the time it takes to. You could also get a rough idea on the number of ppr by hooking up an oscilloscope to your tachometer wire and doing some calculation with your estimated idle rpms. Adjusting the slow speed on a 6 HP Johnson outboard motor regularly will keep the engine running efficiently and provide better fuel economy. Using a simple timing light and hooking it up to the #1 cylinder, I made the adjustment back to 0 and it purred like a kitten. Hi All, I have a 2003 Camry 4 cylinder. The motor will run but I need to manipulate the choke to keep it from stalling. I have a 1987 21 Enchanter with a 84' Mercury 2. At the lowest idle, it dies down and sometimes shuts off. I have a 2001 Mercury 125 hp EXLPTO outboard. After she warms up she is smooth as glass. The motor idle nice and smooth out of gear in the water but in gear dead slow trolling it has a annoying sort of rough idle,if I put it out of gear give the throttle a rev and put back into gear it will run really smooth for about 10 seconds then start its rough idle again. It has a rough idle at slow speed below 5 mph. Mercury 140 hp outboard idle to high trim and tilt repair book 75 johnson compression test 1990 60 mariner rough idle spec on 1998 fast idle on a 15hp johnson 1985 johnson 25hp boat motor wont run 1998 mercruiser 5. On a test water hose it will shift in gear and continue running but on the lake it cuts off. Without it, you’re not going to get too far. If I reattach the number one plug wire the engine will sputter and die. 1978 mercury 9. 0T Just passed 100K miles. Backed by decades of innovation and leadership, Mercury outboards are built to go the distance, delivering legendary performance driven by forward-thinking technology. Manule maintencance 25 hp johnston running rough 25 hp mairiner 4 stroke dies when put into gear 25 hp mariner outboard manual 25 hp mercury idle and lean mixture screws 25 hp mercury mixture and idle setting 25 hp 2013 mercury outboard 25 hp mercury outboard reverse repair 25 hp suzuki outboard want pump gas 25 hp suzuki wiring 25 hp yamaha 2. A rough engine idle or stalling is a common complaint, but in some cases can be difficult to resolve. When you are replacing aged fuel lines don't forget to replace the primer ball and hose connectors as well. it would not re start. The rough idle can also because by a bad camshaft. 8 merc that just started running rough. I first suspected fuel related and chan. Using a simple timing light and hooking it up to the #1 cylinder, I made the adjustment back to 0 and it purred like a kitten. I completed the repair on my mercury and it was exactly as expected. The engine should be kept in neutral and not run above a fast idle speed (1,000 rpm maximum). There are currently 22 users online. 9 hp 4 stroke; set idle mixture screws on 2003 mecury 9. A misfire may occur when your engine is idling, causing a rough or uneven idle. At first, only I would notice the rough idle. It sat for 3-4 years without any use, but otherwise was maintained very well and shows no signs of abuse. Re: Root cause of Mercury 2-strokes' rough idle Rough idle is a subjective statement.