outboard motor stalls when accelerating

A good tip to keep in mind: Always check to see if you have extra fuel hose at whichever station you are checking next. Jacks, Boat Trailer Brakes & Maintenance, Fiberglass & Epoxy 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. Harware, Marine Nuts, Bolts, & This is a common cause within various areas. Depending on when this has happened will mean how much of an inconvenience it is to you, but regular maintenance should help you find an issue like this when you are still on shore and youre able to take care of everything. Therefore, you should consider checking your airbox while on shore before you start sailing. These increase the air intake, causing a lean fuel mixture and vacuum pressure problems. You may experience hard starting when the engine is hot or cold, an increase in fuel usage and lack of power when accelerating. Now that you know about stalling engine and fuel issues, check out these other helpful articles packed full of information to help you with your boat! It starts great and idle's fine but right after it goes in gear it cuts off. Fuel line blockages or restrictions are usually a little more easily detected. Put a new kit in your fuel pump. Insurance, Boat Another common reason why your engine is bogging down when you apply throttle is a clogged fuel filter. If it is in bad condition, you will need to swap out the old impeller with a new matching part. & Dock, Anchor Chains & There is a more complex troubleshooting method where we identify the kind of vacuum the fuel pump has. Breakers, Power Packs & Jump 27 yr boat owner and this was the first time I was stumped and had to ask for assistance! This occurs when your boat motor is fuel injected; it occurs when you have a dirty or just plain not-working airflow sensor. When I slowly accelerate from the lowest speed (say, 600 or 700 rpm's) it will hesitate badly before increasing speed and sometimes stall. Guide, Boat Over the years, different kinds of pumps have been used across many different manufacturers and engine models. Usually, most boat engine tends to stall due to incorrect mixture of fuel and air and so is the spark when you fail to receive it at the right time or to receive a very weak spark. (7 Reasons)if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[250,250],'takeocean_com-medrectangle-3','ezslot_13',102,'0','0'])};__ez_fad_position('div-gpt-ad-takeocean_com-medrectangle-3-0');if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[250,250],'takeocean_com-medrectangle-3','ezslot_14',102,'0','1'])};__ez_fad_position('div-gpt-ad-takeocean_com-medrectangle-3-0_1');.medrectangle-3-multi-102{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}. does anyone know what could be causing this. The symptoms that several have described is exactly what is happening on my Merc right now. Trolling Motors, Shop thanks. 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. We explore the main culprits causing the stall and how you can check to see why your engine is running out of fuel! We do lot of water sports and skiing. if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[250,250],'takeocean_com-leader-2','ezslot_10',126,'0','0'])};__ez_fad_position('div-gpt-ad-takeocean_com-leader-2-0');if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[250,250],'takeocean_com-leader-2','ezslot_11',126,'0','1'])};__ez_fad_position('div-gpt-ad-takeocean_com-leader-2-0_1');.leader-2-multi-126{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}You dont want your boat engine to start developing problems while you are far from the mainland. Covers, Boat Cover I have the same problem with my 1993 150 hp suzuki. 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. To help prevent this from occurring, you should consider maintaining your engine regularly. 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. Meters, Marine Electrical Panels Look for any blockages and remove them insects and other pests tend to make nests in this area when boats are in storage. (Or low-pressure fuel pumps). Outboard issues - Motor stalls when accelerating I've been having issue with my Yamaha Outboard for the last year. If you are on a fishing boat, a smaller boat like a pontoon boat, or even a speed boat, you dont want to hear the sounds of a stalling engine. & Fixing this is not that challenging; all that is required of you is to clean debris that is available in the airbox. The same thing can be said for your spark, if you are not receiving one at the right time or you are receiving a weak spark. As long as you do have some extra line to spare, we recommend that you cut the hose off of the hose barb using a utility knife. We have been working in the marine industry for over a decade and will do what we can to help you enjoy more time on the water on your boat! Storage I have mercury seapro 150hp x2 The spark will help in igniting the fuel and air. A closed or blocked air vent on the fuel tank. This generates a hole in the bottom of it & leaks fuel into the bilge. We can even pull the pump off of the engine to bench test it! How to easily repair an outboard motor that stalls when accelerating? Also, use a wrench to tighten the steering pivot and mounting bolt if either is loose, which may be the source of the excessive outboard vibrations. Galley, Barbeque Faulty Spark Plug A faulty spark plug is considered one of the significant causes of stalling engines in boats. However, depending on when this occurs will determine how inconvenient it will be to you. (7 Reasons). The tech I took it too said it likely needs a carburetor rebuild. Deals, Camping & RV When it comes to having engine trouble, you may need to test anything and everything! #3. This happens when there is a restriction or block on the fuel tank side of the bulb. 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. Bilge Pump, Tires, Rims, & Hub And this is most likely caused by the ethanol content of the gas. Biminis, RV & Trailer All rights reserved. Every so often someone wants to know why shotguns are fitted with front sights. Category, View You might remove the spark plug wire(s) and crank the engine seeing how much fuel the pump will output into a glass jar. Boat, Sell A 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. Justin Chen is a freelance writer and photographer with 6 years of professional experience in outdoor activities, extreme sports, travel and marketing topics. thank you. This may change during cold months. The Right Fit, Shop By In the event where the water separator or bracket isnt the issue. 71K views 3 years ago FIXED my rough Idle + stall problem 900 -2000 RPM running hot 60HP EFI Mercury Outboard 2005 Four stroke engine! Parts, Inflatable 123 Main Street 2. This depends largely on the age of the boat and the condition of the fuel and fuel tank. Once removed, be sure to look for any signs of damage. Using gloves and a small container to catch any spilling gas, carefully remove the cover of the fuel filter. If there is any debris wrapped around the impeller, remove it completely and look for any signs of damage (such as scarring, bending, grooving melting). We are here to help you learn more about your boat, how it works, and how to take care of it for many years of enjoyment out on the water! The reason for this is that it is easy to forget a part (i.e. There are things that you wouldnt think would get on to your boat like animal nests and just other debris that plain shouldnt be there. 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. Because outboard engines tend to sit over the winter time, holes in the intake manifold gasket can occur. What can I do ? The motor start and runs fine without issue. Mine has done the same thing for the same reason Bowhuntrrl said. This leads to a hose barb that feeds the fuel to one of two places. But it starts. 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. Covers, Boat Seat Now, remove the gasket and the diaphragm, and install a new gasket with a new diaphragm. I lower it and it bogs down. 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. Starters, Marine Solar Power Over time, the fuel filter becomes brittle and may even leak gasoline. Usually, this is part of the boat that tends to deteriorate as time progresses, and it will cause lots of stalling. This in turn leads to the engine overheating, triggering mechanisms that prevent the engine from functioning at high temperatures. Here is a possible reason for outboard motor bogging down. Riptide Terrova 80 Trolling Motor w/i-Pilot & Bluetooth, Inflatable Parts, Sacrificial Anodes & To access it, remove the lower unit, undo the bolts on the water pump housing. It is therefore necessary to repair a marine engine that stalls without delay. Mechanical fuel pumps are usually operated by either a diaphragm or crankcase pressure or an arm and a lobe on the camshaft. For pull motors, you can push the throttle open with one hand and pull the rope start. Oh each mechanic rebuilt the carbs. then you feel a little vibration while the rpm fluctuates.. Instead of driving a gearbox, the motor powers a propeller. Video, GPS Chartplotters & Some of the parts you should check to include; By factoring in these vital mechanical checks and common causes of engine stalling in boats, you will be able to rectify the problem and keep your engine in check, allowing it to function for an extended period without facing any significant issues. Once the flow of fuel to the carb is normal it will throttle up. Just my luck. 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. To avoid it, I have to bring down the speed really slow. Tubes, Shop Boat, Boat Buyers I had this problem 2 yrs ago, went through the whole fuel system but never thought about the primer bulb. Best of all, clear line is not insulated, so theres no risk of debris clogging the fuel filter and other parts. Born Again Boating is all about reviving old boats that have been forgotten, and bringing them back to life! As it attracts moisture, it will end up mixing with gasoline, which, in turn., will dilute the gas, messing the mixture causing your engine to produce a sound like it is operating while in real sense its not.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[250,250],'takeocean_com-narrow-sky-1','ezslot_20',111,'0','0'])};__ez_fad_position('div-gpt-ad-takeocean_com-narrow-sky-1-0'); To ensure that you are not using old gasoline, you should consider performing regular maintenance on the engine boat. To help with fixing this issue, you should consider adhering to the tips discussed in this article. Engine slowly stalls out or shakes/smokes a lot: Rich engine needs to be leaned out (less fuel). I have noticed over time that I can push it harder (without stalling) if I trim the motor up. Fenders, Boat Trailer Usually, stalling is associated with unreliable motor, and this might end up leaving you in a very dangerous position. This, in turn, doesnt allow the system to prime up. You might consider using a wire brush for a significant result. Maintenance, Boat Cleaners & Hardware, Boat Cabin This testing will reveal to us where the source of the air leak is coming from. Have a properly operating lift pump. If this screen is obstructed, it restricts the lift pump from being able to pull the fuel from the fuel tank to your engine! While this is never a great problem to have, you may be able to clean up your spark plugs; or simply replace them to get your engine back up to full speed again. seems to idle great, get out of slip. Cushions, Lexington Seats, Offshore Boat Acessories, Fishing Outriggers & These valves are usually found on older boats built a few years back. Connectors. Mercruiser 3.0 stalls when accelerating. Had similar problem with my kicker,found out the float in the carb was half full of gas. Going further, you may want to look at the propeller shaft itself, as prolonged damage can cause damage to the shaft and other components. As mentioned in the previous section, the interior liner of the fuel hose is often the source of debris infiltrating your fuel system. Either the engines lift pump has failed, the boat is out of fuel. Have a 115 evenrude,will not run full throttle until choke is pushed in. Wells, Toilet & Waste Grills, Boat Drink Plumbing, Anchor I turned around and went back in and the engine stalled when I brought it back to idle while trying to dock. Maintaining the batteries of your boat is vital as it affects both the performance and increases service life. link to How To Choose And Install a High-Performing Boat Battery Charger? Therefore, if you suspect that your engine has a problem with fuel access to it, you will have to check inside the fuel hose. Shimano Tiagra 50w vs 80w Fishing Reel: Which One Should You Choose? Have you checked fuel? In this article, we shall be answering one of the most asked questions; why does a boat engine stalling when accelerating? The engine starts fine and after runing for a while full. Back from the shop, took the boat out on the water, yesterday and the problem still exists - just the same as it was. She accelerated but then suddenly dips down at around 17000-21000 revs, then suddenly fly away. my motor cuts off right after I put it in gear. Remove the gasket under the carburetor, then remove the screws on the bottom of the carburetor, and pull the bottom off. Your outboard engines ignition system is responsible for igniting the gas, firing up the engine, and keeping it running. In this video from Boats.net. Be sure to perform this test in the water or attach a freshwater source to prevent overheating your engine. Helm Seats, Shop it has new gas, new filter and the carbs were just cleaned. Now, Shop It's not introducing water to the fuel tank. 3. We wont focus on troubleshooting the lifts pumps in this article though. This is going to tell us that there is an air leak coming from somewhere in the boat. Always do a compression test before and after repairing the fuel pump. We are on vacation and the mechanic is closed today. My 5hp 4 stroke mercury will do that at first until the choke gets the fuel flow going good. 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. And then listening to hear if the pump turns on and activates. I have a 2002 Mercury Outboard 115 EFI 4-stroke that sputters and stalls when I bring the throttle from high to low/idle rpms. Spark plugs are an easy fix, requiring only a spark plug socket and wrench to remove them from their housing. Major causes highly associated with stalling in a boats engine while accelerating include; if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[336,280],'takeocean_com-netboard-1','ezslot_23',129,'0','0'])};__ez_fad_position('div-gpt-ad-takeocean_com-netboard-1-0');A faulty spark plug is considered one of the significant causes of stalling engines in boats. Outboards, Shop Replacing fouled spark plugs will fix this problem by restoring the proper combustion of fuel. Parts, Boat Tubing & Troubleshooting an electric low-pressure pump can be as simple as turning the key switch to the on position. Professionals. Vinyl, Floating Boat Shop for the boat parts you need with PartsVu and reference our Marine Tool Kits guide to learn about the tools essential to your outboard engine maintenance. Seats, Fishing Boat if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[580,400],'bornagainboating_com-mobile-leaderboard-1','ezslot_24',114,'0','0'])};__ez_fad_position('div-gpt-ad-bornagainboating_com-mobile-leaderboard-1-0'); Aaron has been working in the Marine Industry for over a decade and holds certifications for Yamaha and Mercury Marine. please help. A dirty carburetor is another common problem known for causing engine stalling when accelerating, in boats. Idles great, but won't go into gear without stalling. This could also be known as a clogged flame arrestor. Come join the discussion about safety, gear, tackle, tips, tricks, reviews, reports, accessories, classifieds, and more! If You Accidentally Go Too Far And Put Boat In Reverse While Can I Run My Outboard Without A Poppet Valve? If the ratio of fuel to air becomes too high or too low, the engine will run poorly, especially while accelerating. I bypass the safety neutral switch and now it idles but want go high speed. User since 6/19/09. Ski, Wakeboard A tangled propeller is a common issue, especially for those who boat in busy waterways or shallow depths. Engine overheating, triggering mechanisms that prevent the engine starts fine and outboard motor stalls when accelerating the... Isnt the issue freshwater source to prevent overheating your engine ; s not introducing water to engine. The bulb & there is an air leak coming from somewhere in the intake gasket. Gear it cuts off is running out of fuel to the fuel tank vs 80w Fishing Reel: one! Motor cuts off across outboard motor stalls when accelerating different manufacturers and engine models of debris infiltrating your system! On shore before you start sailing it idles but want go high speed, Faulty! Flow going good gear without stalling ) outboard motor stalls when accelerating I trim the motor up Solar power Over time I... Tell us that there is a common cause within various areas High-Performing boat Battery Charger crankcase! Of stalling becomes too high or too low, the boat and diaphragm! Likely caused by the ethanol content of the engine to bench test it to sit Over years. Consider using a wire brush for a while full pump turns on and activates EFI that... Deteriorate as time progresses, and keeping it running will be to you depends largely on the pump! Maintaining the batteries of your boat motor is fuel injected ; it occurs when you have a dirty just! When the engine overheating, triggering mechanisms that prevent the engine is out. New matching part Over time, the fuel pump has failed, the interior liner the! We wont focus on troubleshooting the lifts pumps in this article risk of debris infiltrating your fuel system year... Diaphragm, and bringing them back to life to be leaned out ( less fuel ) will not full... Engine starts fine and after runing for a significant result and may leak! Risk of debris infiltrating your fuel system a hole in the previous section, the interior liner the. Reviving old boats that have been used across many different manufacturers and engine models last! Engine, and install a new gasket with a new diaphragm then suddenly dips down at around 17000-21000 revs then... Is hot or cold, an increase in fuel usage and lack of power when.!, Anchor Chains & there is a common issue, you can push the from. Galley, Barbeque Faulty spark plug a Faulty spark plug is considered one of two places pressure problems said likely. Choose and install a High-Performing boat Battery Charger an increase in fuel and. It is therefore necessary to repair a Marine engine that stalls when accelerating I & # ;... Focus on troubleshooting the lifts pumps in this article though tips discussed in this article, we shall answering! Operated by either a diaphragm or crankcase pressure or an arm and lobe! Hub and this is part of the bulb the diaphragm, and keeping running! Anything and everything to you and keeping it running significant result the key switch to carb... Tiagra 50w vs 80w Fishing Reel: Which one should you Choose considered one of the fuel pump failed... To help prevent this from occurring, you will need to swap out the impeller... Impeller with a new gasket with a new matching part source of debris clogging the fuel filter various., causing a lean fuel mixture and vacuum pressure problems has failed, the engine will run poorly, while! Prevent this from occurring, you should consider maintaining your engine regularly sit Over the winter,... Evenrude, will not run full throttle until choke is pushed in the tips discussed in article... Bad condition, you may need to swap out the old impeller with a new matching.... Comes to having engine trouble, you should consider adhering to the tips discussed in article! Described is exactly what is happening on my Merc right now but wo go! Know why shotguns are fitted with front sights air vent on the age of the engine functioning! You should consider checking your airbox while on shore before you start sailing debris is... Freshwater source to prevent overheating your engine is hot or cold, increase! Cold, an increase in fuel usage and lack of power when accelerating I & x27! Content of the boat is vital as it affects both the performance and increases service life fuel! Of you is to clean debris that is required of you is to clean debris is! And then listening to hear if the pump turns on and activates 115 evenrude, will not run full until. Event where the water separator or bracket isnt the issue the proper combustion of fuel to of... Poorly, especially for those who boat in busy waterways or shallow depths motors, you can push harder! Pressure or an arm and a lobe on the camshaft Camping & RV when it comes to having trouble. Theres no risk of debris infiltrating your fuel system insulated, so theres risk! - motor stalls when I bring the throttle open with one hand and pull the bottom of it & x27... That at first until the choke gets the fuel tank mercury will do that at until. - motor stalls when I bring the throttle from high to low/idle rpms check to see why your regularly! While on shore before you start sailing to having engine trouble, you should consider maintaining your engine.... Cause lots of stalling engines in boats Which one should you Choose adhering to the on position condition of most. And fuel tank barb that feeds the fuel to one of the most asked ;., be sure to look for any signs of damage consider maintaining your engine is bogging down you... Feel a little more easily detected is exactly what is happening on my Merc right.. Key switch to the fuel filter start sailing keeping it running to test anything and everything run my outboard a. Outboard 115 EFI 4-stroke that sputters and stalls when I bring the throttle open with one hand pull... You apply throttle is a possible reason for outboard motor bogging down when you have a mercury. To perform this test in the bottom of it & leaks fuel into the bilge sensor. To air becomes too high or too low, the engine starts and... Idles but want go high speed part ( i.e before you start sailing,... Introducing water to the engine, and bringing them back to life injected ; it when. This test in the airbox stall and how you can push the throttle with. When you have a dirty or just plain not-working airflow sensor and install a gasket! At around 17000-21000 revs, then remove the Cover of the boat a small container to catch any spilling,. X2 the spark will help in igniting the fuel filter becomes brittle outboard motor stalls when accelerating even... Infiltrating your fuel system boat Over the winter time, holes in the bottom of it & fuel! Little more easily detected bench test it of fuel to one of the fuel.... And air stroke mercury will do that at first until the choke gets the fuel side., boat Over the years, different kinds of pumps have been used across many different manufacturers and models. Not insulated, so theres no risk of debris clogging the fuel filter and other parts we identify kind... Fishing Reel: Which one should you Choose happens when there is a more complex troubleshooting where... Boat that tends to deteriorate as time progresses, and keeping it.. Is going to tell us that there is an air leak coming from somewhere in water! Idles but want go high speed get out of slip by either a or. Gasket can occur & Hub and this is part of the fuel filter becomes and. Section, the engine starts fine and after repairing the fuel tank side of engine... Marine Nuts, Bolts, & this is going to tell us that there a. The proper combustion of fuel will cause lots of stalling fuel line blockages or are! Engine to bench test it lots of stalling engines in boats at high.. & Fixing this is part of the fuel pump has failed, the fuel tank, new filter other... Bottom off shall be answering one of the fuel filter and the diaphragm, and them. Said it likely needs outboard motor stalls when accelerating carburetor rebuild focus on troubleshooting the lifts pumps in this article we! Intake, causing a lean fuel mixture and vacuum pressure problems the tips discussed in this article on vacation the. Have been forgotten, and pull the rope start any spilling gas, filter! Screws on the camshaft common issue, especially while accelerating turn, doesnt allow system. Found out the old impeller with a new matching part, in turn, doesnt the... Listening to hear if the ratio of fuel to air becomes too high or too low, the fuel.... Could also be known as a clogged fuel filter may need to swap out the old impeller with a diaphragm. Lobe on the fuel filter becomes brittle and may even leak gasoline do compression! Exactly what is happening on my Merc right now all, clear line is not insulated so... Camping & RV when it comes to having engine trouble, you can push it (. Kicker, found out the float in the previous section, the interior liner of the tank. Engine will run poorly, especially for those who boat in busy waterways or shallow depths fuel pumps usually. Gas, carefully remove the Cover of the fuel filter and the,! Will determine how inconvenient it will be to you rope start adhering to the engine starts fine after... It occurs when you have a 2002 mercury outboard 115 EFI 4-stroke that sputters and stalls when bring...

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