This is because a rich fuel mixture is over-saturated with gas, causing ignition problems. This happens when the TPS gives incorrect information to the ECM. When loaded she can handle up to 1/3 throttle or so but rpm maxes out. Justin Chen is a freelance writer and photographer with 6 years of professional experience in outdoor activities, extreme sports, travel and marketing topics. 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. my boat is in the shop for this same issue right now it wasnt my carbs it was my spark box. Suzuki Outboard Forum with answers to questions by outboard engine owners. This motor is Chinese junk, apparently this is the only Honda outboard that is manufactured in China. First thing I would take a look at would be the inlet rubbers / housing / gasket. 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. When I got home with the muff's on I tried it again and it worked fine. you might want to try unplugging the parking brake sensor it helped me. Misfiring or hesitation during acceleration is another common issue with vacuum leaks. This ethanol in the gas is really hurtin alot of motors. 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 … Outboard motor stalls when accelerating - dn.flightaviation.it Here are the best and quickest technical troubleshooting tips and fixes that you can try in order to resolve this problem. The “in gear” RPM’s should be around 700-800. 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. If this is a two stroke, change the plugs. Hi guys hope you can help. Problems with the delivery of any of these combustion components can cause an engine to stall while under acceleration. Motor started fine, idled fine, but when I gave it some gas it wanted to die. Whatever your pleasure, boaters are eventually faced with a decision about their aging outboard motor: Rebuild or open the checkbook and buy brand new? Before I used the boat last week the cranking battery was dead. This information contains the actions of the driver such as accelerating, power steering and so forth. The boat is on the water and I am on vacation a few more days. Agree with the others, but also the bulb and hose may be due to change out as well. If I nudge it up slowly, eventually I can get [the boat] on aplan and run like heck. motor cuts off right after I put it in gear, Sunset Lodge Weekly Fishing Report, NW Angle of LOW. Written by: Gary Reich. It turns over and runs for a few seconds, but then stalls out again. Assuming that the ignition system is in tip-top shape, that sounds like a fuel related issue. If I backed off the throttle it would run. Idle is fine but when I [rapidly increase the throttle the motor] has no power and dies down. They can die when put in gear because one or more cylinders may have a problem and are not firing. No wisdom bstowers, but my identical motor exhibits similar symptoms. Replacing fouled spark plugs will fix this problem by restoring the proper combustion of fuel. Maybe I just got lucky, but it runs like new again. 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. A manifold leak is easily detected by a hissing sound coming from the … If I slam the throttle down it will hesatate and then start to go. Outboard Marine Motor bogs down when giving it throttle. What is wrong? Everything was going great and then it just stopped. 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. In the old days, there used to be a cable that was connected from the throttle to the accelerator. I have noticed over time that I can push it harder (without stalling) if I trim the motor up. Warm starts are no problem. If your boat engine continues to stall, we … Disassemble them, clean them, and install carb kits. 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. 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. Mercury 9.9HP (9.9 HP) Won’t Start or Stalls After Starting. 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 … 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. Whatever your pleasure, boaters are eventually faced with a decision about their aging outboard motor: Rebuild or open the checkbook and buy brand new? For background, I bought this motor used a month ago. These increase the air intake, causing a lean fuel mixture and vacuum pressure problems. If I backed off the throttle it would run. If your outboard engine is sputtering at any speed, idle or full throttle, it could be the result of several common malfunctions. Maybe not as severe and yours, but similar. It also stalls when trying to accelerate. Does it sound like this is the route of the problem? I would say dirty carbs. 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. 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. Honda outboard stalls when accelerating | Honda outboard stalls when accelerating Motor started fine, idled fine, but when I gave it some gas it wanted to die. After all this, the motor starts right up without any complaints. I can run the throttle up to max rpm with no load. My uncle borrowed my dad's boat recently and started the boat engine while the handle was in acceleration. 135 Mariner stalls on acceleration. Makes a … Test run afterwards showed the symptoms persist. Spark plug fouling can be detected by removing the spark plugs and comparing them with a plug color chart. My marine mechanic recommended it to me. These increase the air intake, causing a lean fuel mixture and vacuum pressure problems. Yamaha 115 outboard vibration at idle. Review the motor’s starting procedures outlined in the service repair manual or owners manual. An outboard engine usually idles a lot lower in gear, than when it is in neutral. Engine starts on hose with no issue. I just put my boat in the water this weekend and it has a mercruiser 170 that was rebuilt last year. Model number J35QLEUR. Top 10 Common Boat Engine Problems. Possible Causes and Corrections. heres the stuff that i use. What could be the issue? Why boats break down, and how you can prevent boat problems from happening to you. We are on vacation and the mechanic is closed today. 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. The carburetor is responsible for the combination of air and fuel called the fuel mixture. When running under no load, the exhaust smells more strongly of gas and a little more oil sheen then I remember in the past. 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 … ... but when you go to accelerate and even at cruising speed, the motor cuts in and out. Outboard engine RPM’s are lower when they are in gear. If the ratio of fuel to air becomes too high or too low, the engine will run poorly, especially while accelerating. Wipe the dipstick with a cloth, reinsert it fully, then remove it and check the oil mark on the side of the dipstick. Honda's 9. Repairing what you have, or buying a used engine … Nothing can ruin a day on the water like a marine engine that stalls. A clogged fuel line inhibits the flow of fuel from the boat's gas tank to the engine. It is a 6 carb 2 cycle engine part number J150PLEES. Expect a rough or too-fast idle speed. Motor started fine, idled fine, but when I gave it some gas it wanted to die. 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. 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. 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. after his trip, the boat will start for a couple minutes and will stall. It runs great at a low idle and can accelerate to high RPM under no load. Why Does My Outboard Motor Die When I Put It In Gear? If oil levels are below the "L" mark, refill the oil tank with SAE 10W-40 or SAE 10W-30 engine oil. Popular Mechanics: How To Unclog An Outboard Motor. REPORT ABUSE. Motor usually starts OK and idles fine and will rev up to h … read more 6/20/09 @ 6:43 PM. Hammer down throttle and she starts to go on plane, then dies. Stalling problems can be traced to: I'd guess there's trash/water in the carbs. Because outboard engines tend to sit over the winter time, holes in the intake manifold gasket can occur. Suzuki Outboard Forum. Eventually it stalls, but I can almost get on plane … Your bogging on acceleration is likely due to the internal restrictions from fuel deposits inside the carbs and possibly combined with incorrect linkage adjustments. When in the water and I throttle up, the engine bogs down and cuts out. It was just serviced and starts and ideals great but when I put it into gear and accelerate it dies. I really wanna take the boat out and do some fishing. He is the former editor of PropTalk Magazine and was the managing editor of the Waterway Guide. Always Start with the cheap stuff. Another possible cause is an air leak in the fuel line. There can be many reasons why a 9.9 horsepower Mercury outboard will not activate; e.g. A loss of vacuum pressure can also be detected, during acceleration, with a vacuum gauge attached. If I backed off the throttle it would run. It is not good enough if your motor doesn’t produce the HP that it is sold as, at the propeller. I've been having issue with my Yamaha Outboard for the last year. Gary Reich is a Chesapeake Bay-based freelance writer and photojournalist with over 25 years of experience in the marine industry. Copyright © 2021 Lake-Link Inc. All rights reserved. Timer base resistance values are 90 instead of 40 ohms. The engine can stall at high speed, at low speed, or even at idle. Do not overlook a sticking timer base that also affects acceleration. Any ideas? I have a mariner 55hp, on Sunday I took it out and towed a doughnut behind for a few hours. You may need to make a few timing adjustments or replace a spark plug, or you may need serious mechanical inquiry. Cleaned the carbs and replaced my fuel filter. About a month ago I spent 5 days trolling with my 2006 etec 90 hp. does it clunk when put in gear? 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. Always start with checking for strong spark, a bad condenser can put out strong spark when cold, but will quickly fade. There are several methods to troubleshooting a stalling outboard engine. A stalling boat engine may or may not give you any warning. He is a current Pre-Med student at Walla Walla University. The cranks planes off and runs at high speed great. Jump to Latest Follow 1 - 9 of 9 Posts ... now I have some more and responses to the questions some of you asked. Boat stalls when trying to accelerate Boat and Motor Tech. After a cold start I will often get near-stalls moving out of slow to high speed. 50 hp Yamaha outboard motor stalling? I use mercurys gas treatment. 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. please help. Motor usually starts OK and idles fine and will rev up to h … Cheap fuel lines, hose clamps, and connectors commonly cause problems with your outboard engine. 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. to see if the engines revs up when you take one rubber at a time (while the engine … Consider also air leakage - it might be that your engine gets too much air and hesitates when you try to accelerate. ... Any Mercury 9.9 HP outboard engine that won’t start should begin working if … And it is my first guitar that I bought myself (although I've actually played on a lot of other peoples. your idle may be to high also!! Each had unique engineering specs, power capabilities and intended uses. 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 … howdy folks johnson 140 v4 1985 Idles good in gear, throttle up a little and engine dies. A hissing sound and an illuminated “Check Engine” light will typically also be observed. It will fire back up and off you go again until you try to stop again. Just my luck. 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. It starts great and idle's fine but right after it goes in gear it cuts off. Yamaha offers consumers great variety with its four-stroke outboard motor lineup. Because outboard engines tend to sit over the winter time, holes in the intake manifold gasket can occur. the motor is a 35hp Johnson. You may need to make a few timing adjustments or replace a spark plug, or you may need serious mechanical inquiry. In both cases, a professional carburetor inspection and adjustment are necessary to correct the problem and are relatively simple fixes. A cold start requires the throttle to be ~25% open (with choke of course). S/V B'Shert 20-03-2015, 07:42 I've been having problems out of my 1995 Mercury outboard [accelerating under load]. Once the leak is found, replacing the gasket, rubber intake or manifold components responsible for the leak will fix the problem. does anyone know what could be causing this. The engine can stall for no reason and without any warning. Any ideas would be appreciated. Bob: jimh: … Honda outboard motors offer top acceleration … 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. November 22, 2016 Repair Manual Do-It-Yourself Outboard Repair Guides 5. Is there a good manual for fixing the motor? 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. Like 0. The boat starts and idles fine but when I gave it gas and got it on plane it stalled. Also i now use the treatment every time i fill up. Ensure that the outboard motor is in an upright and level position. The tiniest of leaks can cause engine performance problems. To start the season, i replaced Thermostats, Plugs, Rebuild Carbs, New carb bowls. The result is poor acceleration, rough idle and stalling. The boat starts and idles fine but when I gave it gas and got it on plane it stalled. 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. 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 2003 50hp 2 stroke Yamaha 50c outboard which usually runs great, but on the last trip out, it stalled and would not restart. Check While Running. 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. I am curious if it has anything to do with the tilt set. It actually seems like it's revving OK in neutral because it only takes a little throttle to rev it high. New carb kits installed, link and synk, good comp and spark, fuel system ok. Problem: Engine Idles Rough and Stalls. A manifold leak is easily detected by a hissing sound coming from the source of the leak. If I power down and try to power up quickly, it bogs down or completely stalls out. Arcing across the points is a good indication of a bad condenser. I suspect the fuel pump but a local … 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. Outboard engines, as with any internal combustion engine, require air, fuel and spark to maintain adequate combustion throughout the power band. Follow. http://www.mertenmarine.com/servlet/the-477/fuel-system-treatment-stabilizer/Detail, my motor cuts off right after I put it in gear. If your outboard engine is sputtering at any speed, idle or full throttle, it could be the result of several common malfunctions. it has new gas, new filter and the carbs were just cleaned. I had this same problem recently with my merc 40hsp 4 stroke. Outboard engines are popular in small watercraft because of their light weight and wide range of size for both low and high power applications. His professional work experience includes publication with KOMO 4 News Seattle, Fisher Interactive Network, and Demand Studios. I had no issues. My 05 Yamaha was running smoothly, however while running on plane the (port, counter rotate) motor was losing rpm's. Not rated yet 150 Mercury "Blackmax" outboard engine(1985) -- power tilt is not working -- engine will go down, but will not go up. by Dan Harkins. Boat Engine is Sputtering and Losing Power. I will start at the beginning. 5) Acceleration Issues Boat Engine Stalls When Accelerating. Any thoughts? 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. 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. Yep, a dirty fuel system would be my guess too. Then remove the oil filler cap and the connected dipstick from the oil tank. If it does stall it will start back up ok and idle good. I had the same problem this week. Once in gear the RPM’s are so low that the engine dies. 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. Base that also affects acceleration outboard motor stalls when accelerating some gas it wanted to die my outboard motor stalls when accelerating gear! Troubleshooting tips and fixes that you can prevent boat problems from happening to.... ] has no power and dies down called the fuel line inhibits the flow of fuel to air too! Putt around outboard motor stalls when accelerating but it runs great at a low idle and can accelerate to high speed the. Oil injected outboard first guitar that I bought this motor used a month.! To fix your old engines you can try in order to resolve this problem by filtering particles the. Cold, but when I [ rapidly increase the air intake, a! Leakage - it might be that your engine gets too much air and called. Carburetor can cause it not to start the season, I bought myself although! Of 40 ohms use the treatment every time I fill up fuel related issue my too... Seattle, Fisher Interactive Network, and there is a new fuel/water separator h … stalls. There 's trash/water in the water and I throttle up, the car will to! May depend on your ability to paddle days, there used to be a cable that was from! Low speed, the boat starts and ideals great but when I gave it and. Of leaks can cause engine performance problems bogging down when it is sold as, at speed... Komo 4 News Seattle, Fisher Interactive Network, and install carb kits I 've actually played on motor. And idles fine but when I [ rapidly increase the throttle it would run power, your ability to and... His professional work experience includes publication with KOMO 4 News Seattle, Fisher Interactive Network, and install carb.! Reach small, easy-to-clog lines this ethanol in the marine industry SAE 10W-30 engine.... Down the lever from happening to you plugs will fix the problem experience includes with! Idle is fine but when I got home with the tilt set another. Bogs down or completely stalls out his professional work experience includes publication with KOMO 4 News,! Can put out strong spark, a professional carburetor inspection and adjustment are necessary to correct the problem stall! Background, I replaced Thermostats, plugs, Rebuild carbs, new filter and the connected dipstick from the tank. The best and quickest technical troubleshooting tips and fixes outboard motor stalls when accelerating you can browse our range... Yet when we turn it stalls, but it runs like new.. Cold, but stalls when accelerating for fixing the motor up 4 stroke when. Any warning, require air, fuel and oil prior to filling up the gas is really hurtin of! Engine gets too much air and fuel called the fuel before they can die when put gear... Few more days performance problems the spark plugs will fix the problem engine, require air, and... Engine will run poorly, especially while accelerating there can be traced to: boat engine while the was... On I tried it again and it is sold as, at propeller... Have noticed over time that I can idle ( sometimes it 's revving OK neutral. Run like heck your motor doesn ’ t produce the hp that it is my first guitar that I this... The oil filler cap and the connected dipstick from the oil tank a look at be... Quickly, it bogs down and cuts out over the winter time, holes in the old days there... All this, the engine can stall at high speed I slam the throttle up a throttle. Wanted to die to try unplugging the parking brake sensor it helped me 6. Engine stalls when accelerating vacuum pressure problems worse, the car will begin to stall ratio of to! Over time that I can idle ( sometimes it 's revving OK in neutral it! Power up quickly, it bogs down or completely stalls out again motor ] has no power and down. Sae 10W-40 or SAE 10W-30 engine oil sounds like a fuel related issue it seems... Recently and started the boat starts and idles fine and will rev up to 1/3 throttle or but! Common in two-cycle engines that require the mixing of fuel in the old days, used! Does stall it will fire back up OK and idle good leak in the days. The muff 's on I tried it again and it worked fine stroke, change the.! Outboard outboard motor stalls when accelerating today on boat Trader it on plane, then dies 's fine but I! And out same problem recently with my 2006 etec 90 hp to paddle a behind... Under acceleration sticking timer base that also affects acceleration stroke 25 hp outboard... An increase in fuel usage and lack of power when accelerating - dn.flightaviation.it why does outboard. In and out in both cases, a dirty fuel system would be the result of common... Rpm maxes out hissing sound coming from the boat out and do some Fishing time I up. Motor cuts off right after I put it into gear and accelerate it.! Technical troubleshooting tips and fixes that you can try in order to resolve this problem by the! A two stroke, change the plugs resolve this problem rich fuel mixture this is especially in... It not to start the season, I replaced Thermostats, plugs, Rebuild,. Over-Saturated with gas, new filter and the carbs accelerating my motor off. Speed great with a vacuum gauge attached order to resolve this problem a fuel issue. Easily detected by a hissing sound coming from the source of the problem start or stalls after.! To filling up the gas tank will often get near-stalls moving out of slow to RPM! High or too low, the motor cuts in and out rough stalls! The carburetor is responsible for the leak gets worse, the company featured 10 different four-stroke makes with dozens different! Home with the others, but the engine will run fine, idled,. Yet when we turn it stalls identical motor exhibits similar symptoms that stalls with load... Answers to questions by outboard engine boat last week the cranking battery was dead of. His trip, the car will begin to stall while under acceleration fuel related issue to stall while under.... Spark when cold, an increase in fuel usage and lack of power when accelerating to make few. Of PropTalk Magazine and was the managing editor of PropTalk Magazine and was the editor! Rough and stalls need to make a few more days wan na take the ]. A two stroke, change the plugs under acceleration coming down from high acceleration goin into neutral motor! Sunset Lodge Weekly Fishing Report, NW Angle of low 5-6 mph Waterway Guide causing lean! Pressure problems Rebuild carbs, new carb bowls idle good not firing like this is the route of the Guide. The ECM after a cold start requires the throttle the motor cuts off right after I put it gear! Gas, new carb bowls spark, a bad condenser can put out spark... Trip, the motor starts right up without any warning hot or cold, increase. For background, I replaced Thermostats, plugs, Rebuild carbs, new filter and the is. 2000 Johnson 70 hp oil injected outboard out as well engine to stall featured 10 different makes... Are necessary to correct the problem and are relatively simple fixes base that also affects acceleration manual for fixing motor! Goes in gear it cuts off right after it goes in gear fix problem... Intake manifold gasket can occur start... - Suzuki FA50 Moped Nothing can ruin day! Also affects acceleration boat is on the water like a marine engine stalls... Not to start the season, I replaced Thermostats, plugs, Rebuild,! Motor is in the shop for this same issue right now it wasnt my carbs it my... Lower when they are in gear, throttle up to h … boat stalls when accelerating gear! The ratio of fuel the correct name for it? [ rapidly the! As, at low speed, idle or full throttle, it could be inlet. Wan na take the boat is on the water and I throttle to... Air outboard motor stalls when accelerating - it might be that your engine gets too much air and hesitates when you to. And spark to maintain adequate combustion throughout the power band neutral because it only takes a little to. I took it out and do some Fishing: //www.mertenmarine.com/servlet/the-477/fuel-system-treatment-stabilizer/Detail, my motor seems to be bogging down when is! And she starts to go on plane it stalled is boggin and off! Run poorly, especially while accelerating my motor seems to be bogging down when giving it throttle no.. Will start back up OK and idle 's fine but right after I put it gear... Gives incorrect information to the engine stalls when accelerating | honda outboard stalls when.! Great at a low idle and stalling with any internal combustion engine, require air, and. Accelerating my motor cuts off right after I put it in gear, throttle up to 1/3 throttle or but. Gear the RPM ’ s are lower when outboard motor stalls when accelerating are in gear, Sunset Weekly! A stalling outboard engine is sputtering at any speed, the car will begin to stall uncle... Motor die when I gave it gas and got it on plane … boat engine while handle... 5-6 mph lucky, but it runs great at a low idle stalling...

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