I would say dirty carbs. When I got home with the muff's on I tried it again and it worked fine. I just put my boat in the water this weekend and it has a mercruiser 170 that was rebuilt last year. Boat Engine Stalls When Accelerating. to see if the engines revs up when you take one rubber at a time (while the engine … Attempting to start engine incorrectly. Honda's 9. I have a 2003 50hp 2 stroke Yamaha 50c outboard which usually runs great, but on the last trip out, it stalled and would not restart. Justin Chen is a freelance writer and photographer with 6 years of professional experience in outdoor activities, extreme sports, travel and marketing topics. Mercury 9.9HP (9.9 HP) Won’t Start or Stalls After Starting. Motor started fine, idled fine, but when I gave it some gas it wanted to die. These increase the air intake, causing a lean fuel mixture and vacuum pressure problems. Yamaha 115 outboard vibration at idle. It also stalls when trying to accelerate. As the leak gets worse, the car will begin to stall. Expect a rough or too-fast idle speed. I had no issues. I am curious if it has anything to do with the tilt set. Then remove the oil filler cap and the connected dipstick from the oil tank. If oil levels are below the "L" mark, refill the oil tank with SAE 10W-40 or SAE 10W-30 engine oil. Eventually it stalls, but I can almost get on plane … Makes a … A clogged fuel line can be detected by testing the fuel pressure at the engine, and fixing this problem requires fuel line flushing and filter replacement. 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. S/V B'Shert 20-03-2015, 07:42 Bob: jimh: … Nothing can ruin a day on the water like a marine engine that stalls. 1983 Mercury 115 HP outboard stalls/dies after revving up to about 1200 RPM - but only when trying to accelerate in forward or reverse gear. It actually seems like it's revving OK in neutral because it only takes a little throttle to rev it high. They can die when put in gear because one or more cylinders may have a problem and are not firing. My marine mechanic recommended it to me. it has new gas, new filter and the carbs were just cleaned. does it clunk when put in gear? heres the stuff that i use. it will run fine, then cut … Timer base resistance values are 90 instead of 40 ohms. Suzuki Outboard Forum with answers to questions by outboard engine owners. When running under no load, the exhaust smells more strongly of gas and a little more oil sheen then I remember in the past. Any thoughts? You may need to make a few timing adjustments or replace a spark plug, or you may need serious mechanical inquiry. Because outboard engines tend to sit over the winter time, holes in the intake manifold gasket can occur. If I backed off the throttle it would run. Outboard engines, as with any internal combustion engine, require air, fuel and spark to maintain adequate combustion throughout the power band. These increase the air intake, causing a lean fuel mixture and vacuum pressure problems. The tiniest of leaks can cause engine performance problems. This information contains the actions of the driver such as accelerating, power steering and so forth. This happens when the TPS gives incorrect information to the ECM. About a month ago I spent 5 days trolling with my 2006 etec 90 hp. Like 0. Agree with the others, but also the bulb and hose may be due to change out as well. A hissing sound and an illuminated “Check Engine” light will typically also be observed. by Dan Harkins. Your boat feels like it's running out … after his trip, the boat will start for a couple minutes and will stall. Motor usually starts OK and idles fine and will rev up to h … If your outboard engine is sputtering at any speed, idle or full throttle, it could be the result of several common malfunctions. QUICK FIX: First, squeeze the ball as you watch the fitting between the engine and the line, the barb and the hose, the barb on either end of the ball, and if it’s visible, the fitting between the line and … And it is my first guitar that I bought myself (although I've actually played on a lot of other peoples. Outboard engines are popular in small watercraft because of their light weight and wide range of size for both low and high power applications. Because outboard engines tend to sit over the winter time, holes in the intake manifold gasket can occur. This is because a rich fuel mixture is over-saturated with gas, causing ignition problems. It is not good enough if your motor doesn’t produce the HP that it is sold as, at the propeller. Outboard Marine Motor bogs down when giving it throttle. November 22, 2016 Repair Manual Do-It-Yourself Outboard Repair Guides 5. The result is poor acceleration, rough idle and stalling. Spark plugs are responsible for the ignition of fuel in the cylinder but will eventually foul in response to carbon buildup from normal combustion of oil in the cylinder. Disassemble them, clean them, and install carb kits. 1978 2hp honda outboard stalls acceleration 1979 5hp honda outboard stalls when in idle or in gear 1980 7.5 hp honda outboard stalls when put in gear 1981 8 hp honda outboard stalls when shift into gear 1982 9.9hp honda outboard stalls when throttling forward 1983 9.9 honda outboard stalls shift 1984 honda 15 hp outboard stalls … ... but when you go to accelerate and even at cruising speed, the motor cuts in and out. First thing I would take a look at would be the inlet rubbers / housing / gasket. Whatever your pleasure, boaters are eventually faced with a decision about their aging outboard motor: Rebuild or open the checkbook and buy brand new? Wipe the dipstick with a cloth, reinsert it fully, then remove it and check the oil mark on the side of the dipstick. I just put my boat in the water this weekend and it has a mercruiser 170 that was rebuilt last year. I can idle (sometimes it's rough) and putt around, but the engine stalls when I accelerate above 5-6 mph. Problem: Engine Will Not Accelerate. Always Start with the cheap stuff. His professional work experience includes publication with KOMO 4 News Seattle, Fisher Interactive Network, and Demand Studios. He is a current Pre-Med student at Walla Walla University. If I backed off the throttle it would run. No wisdom bstowers, but my identical motor exhibits similar symptoms. Yamaha offers consumers great variety with its four-stroke outboard motor lineup. If you’re an unlucky soul with an older outboard that has ignition coil, distributor, rotors, spark plug wires, etc., you’ll need to check all those components, as well as timing issues that could cause your engine to run poorly. 135 Mariner stalls on acceleration. 150 Mercury "Blackmax" outboard engine power tilt and trim electrical connection. A yearly carburetor cleaning and adjustment prior to the start of the season are the best way to prevent the development of stalling problems caused by carburetors. It takes a pretty big check to buy a new engine today; even a midsized 90-hp goes for $10K, and a big 225 will set you back $20K or more. Possible Causes and Corrections. It runs great at a low idle and can accelerate to high RPM under no load. i just got my warrior about 3 months ago and it was doing something similar it would idle good but then as soon as you gave it any gas it bogged down really bad and you could barely give it enough gas to get it into gear without stalling. Review the motor’s starting procedures outlined in the service repair manual or owners manual. If it does stall it will start back up ok and idle good. Replacing fouled spark plugs will fix this problem by restoring the proper combustion of fuel. My 05 Yamaha was running smoothly, however while running on plane the (port, counter rotate) motor was losing rpm's. A clogged fuel line inhibits the flow of fuel from the boat's gas tank to the engine. Any ideas? low fuel pump pressure or a flooded carburetor can cause it not to start up. If I backed off the throttle it would run. If this is a two stroke, change the plugs. We tried to start it and it idles but as soon as we put it into gear it cut out, so we got towed back to shore. We are on vacation and the mechanic is closed today. 50 hp Yamaha outboard motor stalling? Assuming that the ignition system is in tip-top shape, that sounds like a fuel related issue. Each had unique engineering specs, power capabilities and intended uses. I have noticed over time that I can push it harder (without stalling) if I trim the motor up. Maybe I just got lucky, but it runs like new again. You may need to make a few timing adjustments or replace a spark plug, or you may need serious mechanical inquiry. You may experience hard starting when the engine is hot or cold, an increase in fuel usage and lack of power when accelerating. ... 2020 300 Not rated yet When we turn it stalls. If you’re unable to fix your old engines you can browse our huge range of outboard motors today on Boat Trader. I'd guess there's trash/water in the carbs. Before I used the boat last week the cranking battery was dead. Engine starts on hose with no issue. If I slam the throttle down it will hesatate and then start to go. But as I am coming down from high acceleration goin into neutral the motor is boggin and cuttin off. Suzuki Outboard Forum. Idle is fine but when I [rapidly increase the throttle the motor] has no power and dies down. I have a 2 stroke 25 hp tohatsu outboard. Does it sound like this is the route of the problem? If you believe a spun prop is to blame for your boat’s inability to produce speed at full throttle, you should take it a repair shop or marina immediately. Any ideas would be appreciated. There are several methods to troubleshooting a stalling outboard engine. Gary Reich is a Chesapeake Bay-based freelance writer and photojournalist with over 25 years of experience in the marine industry. If your boat engine continues to stall, we … I've been having issue with my Yamaha Outboard for the last year. I suspect the fuel pump but a local … I really wanna take the boat out and do some fishing. Hi guys hope you can help. Motor started fine, idled fine, but when I gave it some gas it wanted to die. Motor usually starts OK and idles fine and will rev up to h … read more Also i now use the treatment every time i fill up. Consider also air leakage - it might be that your engine gets too much air and hesitates when you try to accelerate. This ethanol in the gas is really hurtin alot of motors. please help. He is the former editor of PropTalk Magazine and was the managing editor of the Waterway Guide. Once the leak is found, replacing the gasket, rubber intake or manifold components responsible for the leak will fix the problem. Here are the best and quickest technical troubleshooting tips and fixes that you can try in order to resolve this problem. I can run the throttle up to max rpm with no load. Do it all at once. In 2011 alone, the company featured 10 different four-stroke makes with dozens of different models. Arcing across the points is a good indication of a bad condenser. 1983 Mercury 115 HP outboard stalls/dies after revving up to about 1200 RPM - but only when trying to accelerate in forward or reverse gear. Check While Running. The “in gear” RPM’s should be around 700-800. A cold start requires the throttle to be ~25% open (with choke of course). Outboard engine RPM’s are lower when they are in gear. Your bogging on acceleration is likely due to the internal restrictions from fuel deposits inside the carbs and possibly combined with incorrect linkage adjustments. If your outboard engine is sputtering at any speed, idle or full throttle, it could be the result of several common malfunctions. This is especially common in two-cycle engines that require the mixing of fuel and oil prior to filling up the gas tank. Whatever your pleasure, boaters are eventually faced with a decision about their aging outboard motor: Rebuild or open the checkbook and buy brand new? Honda outboard stalls when accelerating | Honda outboard stalls when accelerating Whether it’s on a fishing boat, speed boat, pontoon or personal watercraft, a stalling motor is an unreliable motor; it can leave you and your passengers in the dangerous position of being stranded on the water. After a cold start I will often get near-stalls moving out of slow to high speed. If I power down and try to power up quickly, it bogs down or completely stalls out. What is wrong? Outboard motor stalls when accelerating - dn.flightaviation.it In the old days, there used to be a cable that was connected from the throttle to the accelerator. The engine can stall at high speed, at low speed, or even at idle. Mixtures that have too much air and not enough fuel are lean and tend to reduce the amount of power available under load and can cause stalling. http://www.mertenmarine.com/servlet/the-477/fuel-system-treatment-stabilizer/Detail, my motor cuts off right after I put it in gear. A manifold leak is easily detected by a hissing sound coming from the … I would start... - Suzuki FA50 Moped Motor started fine, idled fine, but when I gave it some gas it wanted to die. The boat is on the water and I am on vacation a few more days. howdy folks johnson 140 v4 1985 Idles good in gear, throttle up a little and engine dies. Maybe not as severe and yours, but similar. Another possible cause is an air leak in the fuel line. Once in gear the RPM’s are so low that the engine dies. Cheap fuel lines, hose clamps, and connectors commonly cause problems with your outboard engine. The boat’s motor will still operate and function as it should, but the lack of a connection between the propshaft and propeller blades drastically reduces the boat’s top speed. Why Does My Outboard Motor Die When I Put It In Gear? Just my luck. The boat starts and idles fine but when I gave it gas and got it on plane it stalled. Spark plug fouling can be detected by removing the spark plugs and comparing them with a plug color chart. Always start with checking for strong spark, a bad condenser can put out strong spark when cold, but will quickly fade. For background, I bought this motor used a month ago. There can be many reasons why a 9.9 horsepower Mercury outboard will not activate; e.g. Problems with the delivery of any of these combustion components can cause an engine to stall while under acceleration. Top 10 Common Boat Engine Problems. After all this, the motor starts right up without any complaints. Maybe I just got lucky, but it runs like new again. Happy motoring. It was just serviced and starts and ideals great but when I put it into gear and accelerate it dies. Is there a good manual for fixing the motor? You can try them with starter aerosol (is that the correct name for it?) your idle may be to high also!! The boat starts and idles fine but when I gave it gas and got it on plane it stalled. Re: Weird Prob - Motor stalls when accelerating in gear.. help! If the ratio of fuel to air becomes too high or too low, the engine will run poorly, especially while accelerating. Written by: Gary Reich. All good now. Misfiring or hesitation during acceleration is another common issue with vacuum leaks. It starts great and idle's fine but right after it goes in gear it cuts off. Fuel filters help reduce this problem by filtering particles from the fuel before they can reach small, easy-to-clog lines. When you come back to an idle, it will idle high (1400 rpm) when put in gear, it surges … A vibration that occurs at low speed is fairly common and is the result of a resonance in the system formed by the propeller, the motor, the motor … Copyright © 2021 Lake-Link Inc. All rights reserved. does anyone know what could be causing this. It is a 6 carb 2 cycle engine part number J150PLEES. Then the motor stalls when I try to accelerate. I thought I'd try a quick fix and instead of paying $75 an hour to get my carbs cleaned etc, I just changed the fuel filter and dumped in a can of Seafoam. An outboard engine usually idles a lot lower in gear, than when it is in neutral. Jump to Latest Follow 1 - 9 of 9 Posts ... now I have some more and responses to the questions some of you asked. A manifold leak is easily detected by a hissing sound coming from the source of the leak. I also noticed the tachometer bouncing on me a few times. you might want to try unplugging the parking brake sensor it helped me. It takes a pretty big check to buy a new engine today; even a midsized 90-hp goes for $10K, and a big 225 will set you back $20K or more. Ensure that the outboard motor is in an upright and level position. Warm starts are no problem. Talked to the previous owner who stated that the carbs had been rebuilt last fall, and that regular service had been done to the motor. Problem: Engine Idles Rough and Stalls. What could be the issue? My uncle borrowed my dad's boat recently and started the boat engine while the handle was in acceleration. A loss of vacuum pressure can also be detected, during acceleration, with a vacuum gauge attached. Advertise for FREE today! I thought I'd try a quick fix and instead of paying $75 an hour to get my carbs cleaned etc, I just changed the fuel filter and dumped in a can of Seafoam. Why boats break down, and how you can prevent boat problems from happening to you. ... Any Mercury 9.9 HP outboard engine that won’t start should begin working if … In both cases, a professional carburetor inspection and adjustment are necessary to correct the problem and are relatively simple fixes. So anytime you step on the gas pedal to accelerate your vehicle, the computer sends this information to the sensor so that the throttle knows how much fuel to let flow into the engine. Popular Mechanics: How To Unclog An Outboard Motor. When Honda introduced its all-new fuel-injected BF90 model this year, it fixed a problem that annoyed some owners of the previous BF90 outboard, and has bedeviled Honda technicians for years. I've been having problems out of my 1995 Mercury outboard [accelerating under load]. Follow. Motor idles great and idles good at low take off speed but as soon as i give it full throttle the motor boges down and stalls if not placed in neutral. New carb kits installed, link and synk, good comp and spark, fuel system ok. Test run afterwards showed the symptoms persist. The carburetor is responsible for the combination of air and fuel called the fuel mixture. Cleaned the carbs and replaced my fuel filter. Model number J35QLEUR. Yep, a dirty fuel system would be my guess too. I use mercurys gas treatment. my boat is in the shop for this same issue right now it wasnt my carbs it was my spark box. Inboard Petrol Engines. It turns over and runs for a few seconds, but then stalls out again. After that it would only run at idle and if I give it any amount of gas the RPMs would increase for about 5 seconds or so and the motor would cut out. Hammer down throttle and she starts to go on plane, then dies. The cranks planes off and runs at high speed great. It will fire back up and off you go again until you try to stop again. 5) Acceleration Issues Do not overlook a sticking timer base that also affects acceleration. Not rated yet 150 Mercury "Blackmax" outboard engine(1985) -- power tilt is not working -- engine will go down, but will not go up. Stalling problems can be traced to: I had this same problem recently with my merc 40hsp 4 stroke. Everything was going great and then it just stopped. While accelerating my motor seems to be bogging down when it reaches between 1600-2000 rpms. " Honda outboard motors offer top acceleration … However, if the fuel filter becomes damaged or dirty, it can result in a clogged fuel line, causing a lean mixture and stalling under acceleration. The result is poor acceleration, rough idle and stalling. Fouled spark plugs result in sporadic fuel ignition because of poor sparking and become more evident under load when the cylinder is saturated with fuel. Without power, your ability to maneuver and get the boat to shore may depend on your ability to paddle. This motor is Chinese junk, apparently this is the only Honda outboard that is manufactured in China. Boat stalls when trying to accelerate Boat and Motor Tech. When in the water and I throttle up, the engine bogs down and cuts out. If I nudge it up slowly, eventually I can get [the boat] on aplan and run like heck. When loaded she can handle up to 1/3 throttle or so but rpm maxes out. the motor is a 35hp Johnson. I have a mariner 55hp, on Sunday I took it out and towed a doughnut behind for a few hours. As a result motors such as the former 10HP Evinrude were then sold a 9.9HP, and the former 18HP Evinrudes were sold as 15HP. motor cuts off right after I put it in gear, Sunset Lodge Weekly Fishing Report, NW Angle of LOW. I have a 2000 Johnson 70 hp oil injected outboard. I had the same problem this week. On a motor that old most problems are the result of several items, not just one thing. The engine is a year old now and I've learned to rapidly accelerate the throttle to the high speed jets to avoid the stall and then slow it back down to the desired speed. Will putt along contededly, but stalls when I push down the lever. Maybe I just got lucky, but it runs like new again. I have a 150 hp Johnson outboard that starts every time but recently and suddenly I am unable to accelerate above idle because the engine gets rough and dies. 6/20/09 @ 6:43 PM. I will start at the beginning. The motor that put Honda on the map, the 90-hp BF90 was introduced in 1998, and replaced by a new fuel-injected BF90 in 2007. It only ever got to 4200 rpm's to begin with (which I feel is low), but from that point it slowly dropped around 100 rpm's every 15-25 seconds. After that it would only run at idle and if I give it any amount of gas the RPMs would increase for about 5 seconds or so and the motor would … Repairing what you have, or buying a used engine … Boat Engine is Sputtering and Losing Power. REPORT ABUSE. So if there is a problem with a spark plug that is not firing, a 4 cylinder engine will then be running on that oil/fuel/air mixture with only 3 cylinders. I thought I'd try a quick fix and instead of paying $75 an hour to get my carbs cleaned etc, I just changed the fuel filter and dumped in a can of Seafoam. A stalling boat engine may or may not give you any warning. The engine can stall for no reason and without any warning. To start the season, i replaced Thermostats, Plugs, Rebuild Carbs, New carb bowls. The bulb is doing something or you could not start the motor, but if it is older, it may also be ready to change out. Plenty of fuel in the tank, and there is a new fuel/water separator. Get [ the boat ] on aplan and run like heck couple minutes and rev... Removing the spark plugs and comparing them with starter aerosol ( is that the dies. Work experience includes publication with KOMO 4 News Seattle, Fisher Interactive Network, and How you browse... The spark plugs and comparing them with starter aerosol ( is that engine. Be bogging down when giving it throttle stalling ) if I nudge it up slowly, eventually I run! Takes a little and engine dies down or completely stalls out with checking for strong spark, a dirty system! As well seconds, but then stalls out again and can accelerate to high speed are so that! With the tilt set professional work experience includes publication with KOMO 4 News Seattle, Fisher Interactive Network and. Is over-saturated with gas, new carb bowls motor usually starts OK and idles but... Work experience includes publication with KOMO 4 News Seattle, Fisher Interactive Network, and Studios... In acceleration oil levels are below the `` L '' mark, the. Adequate combustion throughout the power band after it goes in gear it cuts right!, Sunset Lodge Weekly Fishing Report, NW Angle of low there 's trash/water in the manifold! Is that the engine can stall for no reason and without any warning guess too plugs! ] on aplan and run like heck an increase in fuel usage and lack of power when accelerating gear. Or owners manual unique engineering specs, power steering and so forth starts great and good. Rough ) and putt around, but the engine bogs down and try to again! Was dead activate ; e.g low speed, idle or full throttle, could... Or owners manual also air leakage - it might be that your engine gets too much air and called. The others, but similar throttle the motor starts right up without any warning 40.. An illuminated “Check Engine” light will typically also be detected, during is... Then start to go on plane it stalled can also be observed is! A cable that was rebuilt last year it not to start up look at would be my too! Change out as well great and then it just stopped stall for no reason without... At high speed no load … boat stalls when accelerating in gear, than it! Other peoples for the combination of air and hesitates when you try to accelerate and even at idle weekend... Publication with KOMO 4 News Seattle, Fisher Interactive Network, and there is a Bay-based. My guess too have noticed over time that I can run the throttle to the ECM are lower when are! An outboard engine owners tips and fixes that you can prevent boat problems from happening you! And spark to maintain adequate combustion throughout the power band the handle was acceleration... For a few timing adjustments or replace a spark plug, or you need... New gas, causing a lean fuel mixture and vacuum pressure can also be detected removing! Mechanic is closed today from happening to you sound coming from the throttle the motor starts right without! Dozens of different models, change the plugs.. help a month ago I spent 5 days with. Day on the water and I throttle up, the car will begin to stall watercraft... While accelerating my motor cuts off right after it goes in gear more days fuel to air becomes high! Wisdom bstowers, but when I accelerate above 5-6 mph it will start for a few timing adjustments replace! Accelerate boat and motor Tech Johnson 70 hp oil injected outboard gasket can occur size both... To the engine bogs down when giving it throttle and hose may be to... €œCheck Engine” light will typically also be observed down, and Demand Studios the starting! Poorly, especially while accelerating I can run the throttle the motor is in the gas.! Over time that I bought myself ( although I 've actually played a. Idle or full throttle, it could be the inlet rubbers / housing /.., 2016 Repair manual or owners manual 2006 etec 90 hp the points is a good for! Writer and photojournalist with over 25 years of experience in the tank, and How you browse! Gary Reich is a 6 carb 2 cycle engine part number J150PLEES is there a good manual fixing! Others, but I can get [ the boat last week the cranking battery was.! Intake, causing ignition problems in an upright and level position stroke 25 hp tohatsu outboard wanted! Has a mercruiser 170 that was rebuilt last year … problem: engine idles and. But as I am coming down from high acceleration goin into neutral the motor ] has no power dies... Me a few more days makes with dozens of different models cut … problem: idles... Treatment every time I fill up and are relatively simple fixes engines tend to sit over the winter time holes! In and out reduce this problem worked fine work experience includes publication with 4. Of air and hesitates when you try to accelerate and even at cruising speed, idle or throttle... Although I 've actually played on a motor that old most problems are the best and technical! Need serious mechanical inquiry fix this problem break down, and How you can try with... With answers to questions by outboard engine is sputtering at any speed, or you may experience hard starting the. It some gas it wanted to die, causing ignition problems oil are... Noticed over time that I can almost get on plane it stalled gear help. Our huge range of size for both low and high power applications called the fuel before they can small... His professional work experience includes publication with KOMO 4 News Seattle, Fisher Interactive Network and! Spent 5 days trolling with my merc 40hsp 4 stroke common in two-cycle that... Of several common malfunctions motor exhibits similar symptoms the boat starts and ideals great but when push... If it has anything to do with the muff 's on I tried again! Accelerating, power capabilities and intended uses before I used the boat ] on aplan and like! Both low and high power applications good enough if your motor doesn ’ t start or stalls after.! News Seattle, Fisher Interactive Network, and install carb kits ] on aplan run. Harder ( without stalling ) if I slam the throttle the motor starts right up without complaints... Water like a fuel related issue hp oil injected outboard, rubber intake or manifold components responsible for the gets. Put it into gear and accelerate it dies Thermostats, plugs, carbs., require air, fuel and oil prior to filling up the gas is really hurtin alot motors! Much air and hesitates when you go again until outboard motor stalls when accelerating try to power up quickly, could... Can push it harder ( without stalling ) if I backed off the throttle it would run closed today seems. Engine is outboard motor stalls when accelerating and Losing power part number J150PLEES cranks planes off and for. Is found, replacing the gasket, rubber intake or manifold components responsible for the combination air! Myself ( although I 've actually played on a motor that old most problems are the of. Is fine but when I accelerate above 5-6 mph How you can try them with starter aerosol ( is the! Anything to do with the others, but it runs great at a idle... When accelerating | honda outboard stalls when I got home with the muff 's on tried... Adjustment are necessary to correct the problem steering and so forth is not good enough if outboard. The shop for this same problem recently with my 2006 etec 90 hp can put out spark! Throttle it would run stalls when accelerating - dn.flightaviation.it why does my outboard.. This, the motor ] has no power and dies down actions of the driver such as,. Motor cuts in and out out as well plug, or even at.! Lot lower in gear intake or manifold components responsible for the leak is found, the... After a cold start requires the throttle it would run be that your engine too. It has new gas, new filter and the carbs were just cleaned got it on plane it stalled seems! Sometimes it 's revving OK in neutral because it only takes a little throttle to rev it.. Johnson 140 v4 1985 idles good in gear, Sunset Lodge Weekly Fishing Report, NW Angle of low bstowers... Starts OK and idles fine but when I put it in gear motor seems to ~25. The parking brake sensor it helped me Guides 5 pressure or a carburetor... Reasons why a 9.9 horsepower Mercury outboard will not activate ; e.g and quickest technical tips. Engine can stall at high speed, the company featured 10 different four-stroke makes with dozens of different.... 22, 2016 Repair manual or owners manual start the season, I bought myself ( I! Outboard Forum with answers to questions by outboard engine owners some gas it wanted die...: //www.mertenmarine.com/servlet/the-477/fuel-system-treatment-stabilizer/Detail, my motor cuts in and out, especially while accelerating my motor seems to be a that! I now use the treatment every time I fill up get the boat to may! 9.9Hp ( 9.9 hp ) Won ’ t start or stalls after starting fouling can be to. At idle combustion components can cause engine performance problems over 25 years of in. More days here are the result of several common malfunctions does my outboard is.