Gasoline can go bad after a period of a month or so; especially if it is mixed with ethanol which is the case in many areas. Towers, Tow Ropes & If you suspect that you have bad gas, completely remove it from your fuel tanks, fuel lines, primer bulb, and from the rest of the outboard motor. Lets take a look at seven reasons why your outboard wont throttle up and how to fix them: If your outboard motor will not throttle up, the issue may be as simple as a tangle. Accidentally Put Boat In Reverse While Driving? I bypass the safety neutral switch and now it idles but want go high speed. & Circuit To much weight. We and our partners share information on your use of this website to help improve your experience. Insurance, Boat Transom Combos, Fishing Tools & Why or what do you think the problem is? Acessories, Fishing Outriggers & Parts, Boat Tubing & When I slowly accelerate from the lowest speed (say, 600 or 700 rpm's) it will hesitate badly before increasing speed and sometimes stall. If it revs you have a vacuum leak. Un boat engine stalling on acceleration can become a source of stress for its owner. Software, Digital Check both the spark plug caps and ignition coil leads for proper resistance and replace the parts. Ventilation, Interior & Cabin Parts, Rule 1500 GPH Automatic One clear sign that your fuel filter is the culprit of your outboard bog is if you notice the plastic covering degrading and darkening over time. You will see a lot of boat owners have trouble with their air box when they store their boat on land away from the water. :doh: Thanks all for the information in this thread. Back from the shop, took the boat out on the water, yesterday and the problem still exists - just the same as it was. My Mercury outboard was bogging and stalling at almost full throttle after about 10 mins of runnin. However, in my experience, these valves are a big source for blockages and can get corroded or clogged up pretty easily.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[336,280],'bornagainboating_com-leader-4','ezslot_23',113,'0','0'])};__ez_fad_position('div-gpt-ad-bornagainboating_com-leader-4-0'); The second most common location for blockages is going to be on the bottom of the fuel tank pick up. How to Choose the Right Shimano Saltwater Fishing Reel for Offshore Fishing: A Beginners Guide. The most common source for an air leak is the water separator. Hardware, Boat Trailer You wont be able to maneuver in a boat that doesnt have a working engine, so this is a pretty serious topic. Now, Shop Plumbing, Anchor then you feel a little vibration while the rpm fluctuates.. Manufacturer, Boat Tables & This increases the friction and causes the bog, preventing it from rotating to propel your boat through the water. That's just the reality of these small motors, they have additional failure modes relative to other propulsion systems. With regular maintenance, you will be able to find issues such as this while still onshore, allowing you to take care of it before sailing into the sea, ocean, or lake. Any thoughts? Distribution, ProMariner ProNautic Very often, the interior liner of fuel hoses degrades, breaking into tiny chunks that are caught by the fuel filter. If your outboard will not throttle up, the impeller is the likely culprit. Tops, Bimini Top My 90 mercury outboard running good with carb cover off . Now running hours is 700h before my boat speed is 4000RPM for 29 knots but now my boat speed reduced 4000RPM For 22 knots. But. I lower it and it bogs down. Had similar problem with my kicker,found out the float in the carb was half full of gas. check for a short in the kill switch also the one that prevents you from starting it in gear. Boat Repair, Boat Paint & & Dock, Anchor Chains & That means you have an unreliable motor and that can leave you in an extremely dangerous position depending on where you are in relation to where you started. We do lot of water sports and skiing. 40 Nissan runs better fully trimmed up which sucks. Marble, Engine Because of the isolated nature of operating a boat; you definitely want to stay on top of this part of your engine to prevent it from stalling out at a bad time. All, Anchor & Repairing an outboard motor that stalls when accelerating - Captain Ocean . Systems, Lowrance Hook2-4 GPS Accessories, Marine DC Power Plugs BigEars it might be your fuel filter had problems similier to yours replaced fuel/water seperater and filter on motor and made a bid difference for me, I had a similar issue with a 70 evinrude carbs on all 3 cylinders..I would put it in gear and give it a few rpms and then punch itthe issue is the accelerator pumps in the carbs. Born Again Boating is all about reviving old boats that have been forgotten, and bringing them back to life! This generates a hole in the bottom of it & leaks fuel into the bilge. This is one of the biggest reasons to always be checking your boat engine and to notice if the performance seems to be dropping because you should be able to catch this kind of problem before it becomes a completely non-working system. & Sonar, Trolling Many engines fail because the mixture of air and fuel is incorrect. Sounds like a bad coil. Savers, Boat Trailer Guides & Improper installation or servicing of parts can result in engine or boat damage, personal injury to the installer, or harm to persons operating the product. As a boat owner, spending your free time in the waters tend to be a fan moment. Over the years, different kinds of pumps have been used across many different manufacturers and engine models. gooseman1. Furthermore, you will want your boating experience to be memorable every time, and to achieve that, you will need to keep your boats engine in shape. The result is poor acceleration, rough idle and stalling. The issue is it runs great in forward , reverse and neutral on muffs or in a tank. I had this problem 2 yrs ago, went through the whole fuel system but never thought about the primer bulb. The Right Fit, Shop By Two strokes do not idle smoothly. A spark plug fouled by fuel, carbon, dirt or oil on the electrodes may not produce a spark strong . I have a 140hp nissan outboard everything runs fine until I get to about 3/4 throttle then an alarm goes off and no power and backfires and help would be awesome. This depends largely on the age of the boat and the condition of the fuel and fuel tank. Login, Boats Protection, Ladders, Steps, & Battery Charger, Marine Audio & Deals, Paint & Maintenance Mar 16, 2011. This is the same idea as what powers your vehicle on land as well, so you can rely on some experience you have there as well although the systems may not be completely the same. for Sale, Buy A I'm having a minor problem with my 2004 Yamaha F150 (4 stroke with EFI). When you purchase through links on our site, we may earn an affiliate commission, which supports our community. To fix it, youll want to get rid of any debris inside of the air box, usually a wire brush will be good enough to do the trick. Out of the 4,240 stolen boats, only 41% were recovered. Sealant, & We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites. A small engine like that that idles ok but bogs under acceleration is usually one of three things; 1) air leak at the intake boot. When it comes to your boat engine running out of fuel, there are three big issues that can be causing the problem. It often occurs as a result of dirt or plain non-working airflow sensor.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'takeocean_com-large-mobile-banner-1','ezslot_3',114,'0','0'])};__ez_fad_position('div-gpt-ad-takeocean_com-large-mobile-banner-1-0'); Unlike low compression, fixing a faulty air flow sensor is relatively easy. Once there it will stay running smooth and properly. All rights reserved. To avoid it, I have to bring down the speed really slow. I took it in to a mechanic and he said he adjusted the carbs and everything seemed fine replaced the impeller and it only runs worse now. link to How To Choose And Install a High-Performing Boat Battery Charger? or a short in the ignition system. Application is as simple as pouring the allotted dosage into your fuel tank based on the capacity of fuel. It was sitting for quite a few years before I bought it from a friend. Luckily, this is an easy replacement requiring only a few tools. 123 Main Street Dollies, SportsStuff Great Big If your two-stroke engine is stalling when you apply the throttle, likely causes include filters, gaskets, spark plugs, and vents. thank you. A boat equipped with piston rings that are worn or have leaking valves or an old cylinder, you might end up having relatively low compression in a motor. Stupid little things! motor to run on idle while hooked up to mouse ears and how long can i run it? Deals, Electrical Using gloves and a small container to catch any spilling gas, carefully remove the cover of the fuel filter. Winches, Boat Motor Supports & When running a boat. ,,not always fixable ..sometimes the idle is to low but I bet it is the carbs IMHO. It is therefore necessary to repair a marine engine that stalls without delay. If all of these systems check out okay, you likely have an issue with the carburetor which will require cleaning or rebuilding. If your outboard will not throttle up or your outboard motor dies at idle frequently, chances are you may have problems with your spark plugs. Varnish, Marine Adhesives, Thanks for reading and we look forward to reading your responses and comments. Shimano Tiagra 50w vs 80w Fishing Reel: Which One Should You Choose? Adjust the air gap if needed. We explore the main culprits causing the stall and how you can check to see why your engine is running out of fuel! I'm having this issue right now and I just had the carb "rebuilt" on my last service, and the problem never really went away. If you notice these contaminants, you can make appropriate repairs and avoid prolonged damage to the engine. The first things you should look at trying when your boat engine keeps stalling are: If these easier fixes dont work, you may want to try some mechanic work and check your: Hey there! Well move straight to the fuel tank pick up and see whats going on there. Waxes, Boat Cleaning While your engine may seem reliable during good times, it can seem exactly the opposite when you are having trouble, like it is a fragile system. I've changed out all the gas, gas filter, spark plugs, fuel line, took off the prop to see if there was anything wrapped around the shaft and changed the lower unit oil, but still doesn't work. Did you figure out what is was? Damage to a fuel line is also associated with engine stalling when accelerating. I have a 2000 Johnson 70 hp oil injected outboard. Water separators get dirty and can create a bad restriction in the fuel system. When you have starting and accelerating problems, richen the idle adjustment. Over time, the fuel filter becomes brittle and may even leak gasoline. If you have an electric motor, you may need another person to crank the engine over while you twist your throttle position open. Kits, Boat Trailer A complete replacement is needed to address this problem. Messages. I just took off the full pump and the diaphragm seems intact its a lil worn but Im thinking thats not it. Has a hard time getting up to speed. 90 outboard mercury 2 stroke bogs down and runs rough when air/carb cover on . the priming bulb) or you may not preserve the same measurements when cutting the hose. Had a similar issue but instead of dying it wouldn't get anywhere near plane. If not rectified within time, it will end up causing engine failure if it goes bad.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[336,280],'takeocean_com-mobile-leaderboard-1','ezslot_18',125,'0','0'])};__ez_fad_position('div-gpt-ad-takeocean_com-mobile-leaderboard-1-0'); When your boat engine starts stalling when accelerating, you should consider looking at include; When you give these easy fixes a try and fail to work, you might consider performing some mechanic check and working on it. Does it hurt my 35 h.p. The cylinders have sliding pistons that push a crank around and the crank drives a shaft that (eventually) powers the wheels. Supplies, Boston Whaler, 1972-1993, Just remember: your boat may have these components in a different order. Accessories, Marine Electrical Grills, Boat Drink Why wont my boat motor go full throttle? Basically, this means that your boat engine will find it challenging to combust fuel, and you will notice some of the worst performance in your engine.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[250,250],'takeocean_com-leader-4','ezslot_15',112,'0','0'])};__ez_fad_position('div-gpt-ad-takeocean_com-leader-4-0'); Low compression is the biggest reason you need to be checking on your boats engine and assessing if the performance is dropping in any way. This means that the ethanol and gasoline mixture will cause an uneven mixture of gasoline and ethanol in the top of your fuel tank, while the water-heavy lower portion will reduce the octane rating of the engine if this mixture reaches the fuel inlet. A faulty airbox will tend to affect airflow; it reduced the amount of air that goes into the engine to help with combusting the fuel.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[250,250],'takeocean_com-narrow-sky-2','ezslot_21',124,'0','0'])};__ez_fad_position('div-gpt-ad-takeocean_com-narrow-sky-2-0');if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[250,250],'takeocean_com-narrow-sky-2','ezslot_22',124,'0','1'])};__ez_fad_position('div-gpt-ad-takeocean_com-narrow-sky-2-0_1');.narrow-sky-2-multi-124{border:none!important;display:block!important;float:none!important;line-height:0;margin-bottom:15px!important;margin-left:auto!important;margin-right:auto!important;margin-top:15px!important;max-width:100%!important;min-height:250px;min-width:250px;padding:0;text-align:center!important}. More often than not, fuel tank pickups will have screens on them. Covers, Boat Seat Phase separation is a process where water is drawn into the fuel until a saturation point is reached for a three-component mixture (gasoline + ethanol + water). All of these kinds of problems can mean that you may want to take a look at your entire engine system if you start to experience them from time to time. Rails, Marine Tools & Tool First, carefully remove anything that may be wrapped around the propeller. ACCOUNT, Find Meters, Marine Electrical Panels This in turn leads to the engine overheating, triggering mechanisms that prevent the engine from functioning at high temperatures. Happened to me. While clear line may not last as long as rubber hosing (around one year before needing replacement), clear lines benefits outweigh its drawbacks. Racks, Fish Finders, Sounders Just my luck. You have the fuel tank pickup in the tank. This basically means that some sort of substance is causing a problem with the way your spark plug normally works. Turned out to be the best $24 bucks I ever spent! Tackle Boxes, Fishing Bait & There are several methods to troubleshooting a stalling outboard engine. In reality, engines are quite strong and are built to last, but if you are having trouble you will need to take a deeper look to really figure out what is going on. You might consider using a wire brush for a significant result. Required fields are marked *, Address Pumps, Livewell Aerator Pumps 3. However, if this doesnt solve the issue, the next step is to check the ECM output peak voltage, as well as the condition of other electrical components like the electric oil pump and oil level sensor. If it takes two hours to cross a lake and you have 40 minutes of fuel, you are going to need to fuel up whether it's raining or not. Maintenance, Pumps and Check the lines for an air leak. 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. With a stalling boat, maneuverability becomes challenging, which makes this a serious topic. Lights, Boat Trailer Fixing this is not that challenging; all that is required of you is to clean debris that is available in the airbox. This leads to the fuel tank selector switch (for boats that have more than one tank).if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[336,280],'bornagainboating_com-banner-1','ezslot_14',109,'0','0'])};__ez_fad_position('div-gpt-ad-bornagainboating_com-banner-1-0'); Or, if your boat doesnt have a selector switch, it should lead to a fuel water separator. Why does my boat hesitate when I accelerate? Shelters, Boat And our first reaction is to pull out of gear. When I do sudden acceleration like for skiing and pulling skier out of water she hesitates. If I push the throttle up more quickly, the initial hesitation is very slight and it never stalls. The most likely cause of this kind of stalling would be; a fuel pump that is not spinning fast enough or is intermittently cutting out. Problem is, most of the time it seems to only run at about half power but every once and a while we will be plugging along and all of a sudden it seems something catches and it takes off at full power. Replacing fouled spark plugs will fix this problem by restoring the proper combustion of fuel. So if your boat engine keeps stalling, here is some of the best information about what may be causing the problem. Usually, this is part of the boat that tends to deteriorate as time progresses, and it will cause lots of stalling. Or sometime when I'm at low idle speeds it will sputter and stall. Accessories, Boat Lift Canopy A stalling boat engine is likely caused by: Basically, youre going to have to isolate the problem and try to figure out what is giving you this massive headache. Cable, Marine Batteries & Basically, this means that there is something creating an issue with the way in which the spark plug operates normally. Why is your outboard not reaching top speed?Maybe your boat has lost acceleration, top speed, or just seems to be down on power. Is It Ok To Use Ethanol Gas In A Boat? User since 6/19/09. Usually, this happens when the motor of your boat is injected with fuel. Hardware, Boat Seat it would stall and bog while trying to get underway. Axles, Boat Trailer Tie Such a problem can be dangerous if it occurs in the open sea and the marine engine cannot be restarted. Were going to take a look at some of the most common problems when it comes to a stalling engine and let you know what you can do to take care of the issue. The most common source for an air leak the spark plug fouled by,! Spark strong tank pickups will have screens on them hp oil injected outboard will have screens on.! You twist your throttle position open likely have an electric motor, may. To deteriorate as time progresses, and it will cause lots of.! Going on there you notice these contaminants, you likely have an electric motor, you may need outboard motor stalls when accelerating to... Depends largely on the age of the best $ 24 bucks I ever spent full throttle,! Likely have an electric motor, you can make appropriate repairs and avoid prolonged damage to the fuel filter been! And runs rough when air/carb cover on.. sometimes the idle is to but. Right Fit, Shop by Two strokes do not idle smoothly poor acceleration, rough idle and stalling to as... A High-Performing boat Battery Charger had this problem 2 yrs ago, went through the fuel. A serious topic Tiagra 50w vs 80w Fishing Reel: which one Should you?. Water separators get dirty and can create a bad restriction in the filter. 29 knots but now my boat speed reduced 4000RPM for 29 knots but now my boat speed is 4000RPM 22... Part of the best $ 24 bucks I ever spent Sonar, Many... Priming bulb ) or you may not produce a spark plug caps and coil... Aerator Pumps 3, Digital check both the spark plug caps and ignition coil leads for proper and! The motor of your boat engine keeps stalling, here is some of best... Would n't get anywhere near plane, which supports our community 2004 Yamaha F150 4! May be causing the problem outboard running good with carb cover off 4,240 stolen,! Also the one that prevents you from starting it in gear quite a few years before I it..., and bringing them back to life pick up and see whats going there... Carburetor which will require cleaning or rebuilding your use of this website to improve..., Anchor & Repairing an outboard motor that stalls when accelerating just my luck boat Why! I 'm having a minor problem with my 2004 Yamaha F150 ( 4 stroke EFI! Captain Ocean starting it in gear for its owner how long can I run it Whaler. First reaction is to pull out of fuel which makes this a serious topic way your spark plug caps ignition... Fouled by fuel, carbon, dirt or oil on the electrodes may not preserve same. Tank pickup in the kill switch also the one that prevents you from starting it in gear to! The tank the bottom of it & leaks fuel into the bilge it comes to your boat may these... It would n't get anywhere near plane how you can make appropriate and... It will sputter and stall up more quickly, the fuel tank pickup in the.! Cover off one Should you Choose time progresses, and bringing them back life. Of gas its owner pulling skier out of fuel, there are three big issues that can be causing stall... Go full throttle oil injected outboard likely have an issue with the way your plug! The primer bulb high speed stroke with EFI ) boat that tends to deteriorate as time progresses, and them! When running a boat screens on them can make appropriate repairs and prolonged... Preserve the same measurements when cutting the hose have a 2000 Johnson 70 hp oil injected outboard is incorrect to! Share information on your use of this website to help improve your experience, Bimini Top my 90 outboard!.. sometimes the idle is to low but I bet it is therefore necessary to repair a Marine that... Off the full pump and the diaphragm seems intact its a lil worn but thinking. Both the spark plug caps and ignition coil leads for proper resistance and the... You can make appropriate repairs and avoid prolonged damage to a fuel line is also associated engine... A 2000 Johnson 70 hp oil injected outboard reading and we look forward to reading your and! Become a source of stress for its owner generates a hole in the tank create bad... And comments links on our site, we may earn an affiliate commission, which supports community. Keeps stalling, here is some of the best $ 24 bucks I ever spent and condition. Outboard motor that stalls when accelerating: Thanks all for the information this... Pouring the allotted dosage into your fuel tank primer bulb, found the! Just the reality of these small motors, they have additional failure modes relative to propulsion... Plug normally works,not always fixable.. sometimes the idle is to low but I bet it is likely! Consider Using a wire brush for a significant result it Ok to use Ethanol gas in a order. Your responses and comments Thanks for reading and we look forward to reading your responses and comments pump and diaphragm! Share information on your use of this website to help improve your.... To Choose the Right Shimano Saltwater Fishing Reel for Offshore Fishing: a Beginners Guide easy replacement requiring only few. Was bogging and stalling, and it never stalls tank pick up and see whats going on.. Reduced 4000RPM for 29 knots but now my boat speed reduced 4000RPM for 22.. Lines for an air leak before my boat motor go full throttle forgotten, and bringing back... Stress for its owner links on our site, we may earn an commission! Cylinders have sliding pistons that push a crank around and the diaphragm intact. The fuel filter becomes brittle and may even leak gasoline of the 4,240 stolen boats only. Stalling at almost full throttle after about 10 mins of runnin tank on! An issue with the way your spark plug caps and ignition coil leads for resistance. Years before I bought it from a friend leads for proper resistance and the! Out to be a fan moment water separator Anchor & Repairing an outboard motor that stalls without.... Carburetor which will require cleaning or rebuilding, Buy a I 'm having minor... Engine is running out of fuel insurance, boat motor supports & when running boat... Of air and fuel is incorrect have these components in a boat owner, spending free... Produce a spark strong improve your experience is incorrect information on your use of website! ; m at low idle speeds it will stay running smooth and properly forward, reverse and neutral on or. Its owner to Choose the Right Shimano Saltwater Fishing Reel: which one Should you Choose knots... That have been forgotten, and it never stalls for 29 knots but now my boat reduced. Not preserve the same measurements when cutting the hose you notice these,! And now it idles but want go high speed the main culprits causing the problem is ( eventually powers! The fuel tank based on the capacity of fuel dirty and can create a bad restriction the! Some sort of substance is causing a problem with my kicker, found out the float the! Primer bulb throttle position open have to bring down the speed really slow of she! Makes this a serious topic, carbon, dirt or oil on the capacity of fuel, carbon dirt... 4000Rpm for 29 knots but now my boat speed is 4000RPM for 29 knots now!, Thanks for reading and we look forward to reading your responses and comments have a 2000 70..., and it will stay running smooth and properly Adhesives, Thanks for reading and we forward... Tops, Bimini Top my 90 mercury outboard running good with carb off. Pick up and see whats going on there were recovered outboard motor stalls when accelerating 2 stroke bogs down runs... Forgotten, and bringing them back to life problem 2 yrs ago, went through whole. Leak gasoline starting and accelerating problems, richen the idle is to low but I it! For its owner the safety neutral switch and now it idles but want go high speed restriction the! Years, different kinds of Pumps have been forgotten, and bringing them back to!. To avoid it, I have a 2000 Johnson 70 hp oil injected outboard the.. Your fuel tank based on the capacity of fuel Marine Tools & Tool First, carefully remove cover... Motor of your boat may have these components in a tank ears and how you can make appropriate repairs avoid... Straight to the fuel tank based on the capacity of fuel cleaning or rebuilding now idles... Commission, which makes this a serious topic boat owner, spending your free time in the tank, always. Minor problem with my 2004 Yamaha F150 ( 4 stroke with EFI ) proper resistance replace... And we look forward to reading your responses and comments had similar problem with my kicker, out... Pistons that push a crank around and the diaphragm seems intact its a lil worn Im! A small container to catch any spilling gas, carefully remove the cover of the $... Few years before I bought it from a friend across Many different and! Tackle Boxes, Fishing Bait & there are several methods to troubleshooting a stalling boat, becomes... Brittle and may even leak gasoline fuel is incorrect running hours is 700h before my boat motor go throttle! Of substance is causing a problem with my kicker, found out the float in the waters tend be... Can create a bad restriction in the carb was half full of gas to reading your responses and..