Please someone help me and tell me whats happening this two engine? Storage Professionals. I have a 50 hr yamaha outboard motor ,start great idle well,clean filter and all other part check and replace if needed .. but i put in water give some throttle work great and all off a sudden die down the only thing i didnt replace was hose and gas tank it a 2005 , could it be that hose or gas worn out please help frustrated lol, i forgot to mention when i squeeze the bulb it work again for a bit. 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. Dollies, SportsStuff Great Big Mechanical fuel pumps are usually operated by either a diaphragm or crankcase pressure or an arm and a lobe on the camshaft. Luckily, this is an easy replacement requiring only a few tools. I bypass the safety neutral switch and now it idles but want go high speed. Shelters, Boat I thought about bringing it back to the service place, but I have also been thinking that it may be air getting into the fuel line from the start of the problem during the Spring Chinook trolling season. I had 3 techs from different shops over look this very inexpensive fix. You might consider using a wire brush for a significant result. Seats, Pontoon Boat Seats & Engine slowly stalls out or shakes/smokes a lot: Rich engine needs to be leaned out (less fuel). Also, be sure to adequately secure any hose clamps to prevent air, water, or debris from entering the engine. If your outboard will not throttle up, the impeller is the likely culprit. Winches, Boat Motor Supports & The main difference is that there are usually fewer cylinders, operating in either a two-stage or four-stage cycle. Best of all, clear line is not insulated, so theres no risk of debris clogging the fuel filter and other parts. All that is required of you is to clean the air flow sensor or replace it in order for your boat engine to start functioning as normal once again. I adjusted the idel screws and throttle cable. Meanwhile, encouraging you to take care of and enjoy working on your boat! Between the pickup tube that is in the fuel tank, to the engine lift pump. Spark plug fouling can be detected by removing the spark plugs and comparing them with a plug color chart. One of the most common problems that a stalling engine can have is a fouled spark plug. This site is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com We are compensated for referring traffic and business to Amazon and other companies linked to on this site. By doing so, you will be able to notice this engine problem before forcing it to be a non-working system. Your email address will not be published. Come join the discussion about safety, gear, tackle, tips, tricks, reviews, reports, accessories, classifieds, and more! Engine starts on hose with no issue. The motor start and runs fine without issue. This basically means that the engine is going to have a hard time with the combustion process and you are going to notice worse and worse performance over time. check for a short in the kill switch also the one that prevents you from starting it in gear. The engine accelerates and runs great once it gets past about 900 rpm's; the problem only occurs when I slowly accelerate from very low rpm's. Caulking, Marine 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. The most common source for an air leak is the water separator. Replacing fouled spark plugs will fix this problem by restoring the proper combustion of fuel. Read our article that explains exactly How Fuel Supply Modules & Vapor Separator Tanks Operate! such a great article thanks Major causes highly associated with stalling in a boats engine include: Having an engine problem is one of the worst things you would want to experience while spending your day on the water. 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. 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. If you dont have those three things, your engine wont be taking you anywhere. Fasteners, Boat Windshield High Back Reclining Helm Seat, Cabin and When installed, you can observe the presence of contaminants from foggy lines, air bubbles, and discoloration. I have a 1989 Mercury Mariner 25 HP. Protection, Ladders, Steps, & In the event where the water separator or bracket isnt the issue. 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. Usually, this happens when the motor of your boat is injected with fuel. (7 Reasons).if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[250,250],'takeocean_com-banner-1','ezslot_9',104,'0','0'])};__ez_fad_position('div-gpt-ad-takeocean_com-banner-1-0'); For your boat engine to run smoothly, it will require three vital things; spark, fuel, and air. New plugs, thermostat, and fuel/water seperator filter. Ive been running boats for 32 years.Ive learned a lot over the years and learn more every day. Fishing Lures, Fishing Rod Holders & When the impeller is worn, clogged, or misshapen, the ability to cool the engine is drastically reduced. She accelerated but then suddenly dips down at around 17000-21000 revs, then suddenly fly away. This could be from, not receiving enough fuel pressure, to keep it running. Parts, Wash Down Causing the stall under load. This process takes maybe 30-40 seconds after startup. It was sitting for quite a few years before I bought it from a friend. 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. 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. But it starts. ACCOUNT, Find 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. Savers, Boat Trailer Guides & Stalling problems can be traced to: Fouled Spark Plug. This increases the friction and causes the bog, preventing it from rotating to propel your boat through the water. thanks. Biminis, RV & Trailer 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. 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. If the engine stalls, while idling or driving, the engine may be running out of fuel. Helm Seats, Shop Sockets, Marine Electrical Water separators get dirty and can create a bad restriction in the fuel system. Causes Of Stalling In a Boat's Engine While Accelerating Major causes highly associated with stalling in a boat's engine while accelerating include; 1. Required fields are marked *, Address Downs, Couplers, Mounts, The valves are needed to prevent fuel from siphoning out of the fuel tank. Parts, Sacrificial Anodes & The engine starts fine and after runing for a while full. Check your bulge pump, your boat may have a foot of water under the floor. If you notice a rating from the compression gauge at less or more than what is rated for your outboard, it is time to replace the fuel pump. Maintenance, Boat Cleaners & 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. And every time you fill up your gas tank, make sure that the gas cap/cover is air-tight. #3. My Mercury 200 2 strokes are 1999 and had never been replaced . Ive checked and spark seems good on both plugs. Usually, gasoline tends to go bad after a month or more; however, gasoline mixed with ethanol tends to speed up the whole process. If you have a good spark, make sure that the air gap is within specification. when it is in the water and trying to push the weight , it will not go much past 1/4 throttle ,barley planes and boggs when you go full forward throttle ???? At this point in troubleshooting though. They may find the issue, or you may need to replace your outboard altogether. 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. What could it be? You can even anticipate an outboard motor that will stall when accelerating if you detect the warning signs such as: Your boat engine is consuming much more gasoline than usual. compression and vacuum drives the fuel pump. Deals, Pumps & Plumbing This makes no sense whatsoever. your boats Gel Coat Match, Shop Take The Ocean is compensated for referring traffic and business to these companies.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'takeocean_com-banner-2','ezslot_6',116,'0','0'])};__ez_fad_position('div-gpt-ad-takeocean_com-banner-2-0');report this ad. Be sure to replace the fuel hose piece by piece, not removing the entire fuel lines at one time. Add another reason to your list. 27 yr boat owner and this was the first time I was stumped and had to ask for assistance! You could also have the issue of using way too much fuel or you may receive a lack of power when the engine should be running on full power. Trailer Winches, Shop When it comes to stalling in a boat engine, this issue can give one a headache, especially while you are far from land. Accessories, Boat Rafts, Paddle You may also want to try using a mixture of fuel conditioner/stabilizers with your gasoline that takes out the ethanol from the gasoline. 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 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. Boat, Sell A The cylinders have sliding pistons that push a crank around and the crank drives a shaft that (eventually) powers the wheels. 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. Just my luck. Varnish, Marine Adhesives, Just Click Here! 71K views 3 years ago FIXED my rough Idle + stall problem 900 -2000 RPM running hot 60HP EFI Mercury Outboard 2005 Four stroke engine! This happens when there is a restriction or block on the fuel tank side of the bulb. Check the fuel line and it had a crack and was pulling air not gas. When I do sudden acceleration like for skiing and pulling skier out of water she hesitates. The fuel used for your outboard motor can be one of the primary reasons why your outboard motor is bogging down. Accessories, PWC Parts & Your outboard may be stalling for several reasons. You may also like: Which Bass Boat Is Best In Rough Water, A faulty airbox is another issue known for causing a boat engine to start stalling when accelerating. Next, when filling up your gas tank, be sure to choose a low-ethanol fuel, which is usually the Premium type. So, if you notice the primer bulb is sucking flat, youve got a restriction somewhere between the bulb and the fuel tank pick up. Copyright 2019 IBOATS. My first response is to pose another question: Why did World War II Japanese kamikaze pilots wear helmets? For pull motors, you can push the throttle open with one hand and pull the rope start. We wont focus on troubleshooting the lifts pumps in this article though. The mixture is essential; therefore, you will need to get it right, and you may also be required to replace your carburetor. AN Back from the shop, took the boat out on the water, yesterday and the problem still exists - just the same as it was. This is also due to these filters rusting and (if it hasnt been changed in a year or two). Get Your Own Born Again Boating Apparel! Holder, Anchor & Dock Many engines fail because the mixture of air and fuel is incorrect. Covers, Boat Wiring & Tops, Other Problems with the delivery of any of these combustion components can cause an engine to stall while under acceleration. Usually, a dirty carburetor causes incorrect air as well as fuel mixture, which means that the engine of your boat will not operate, as usual, resulting in a stall. If You Accidentally Go Too Far And Put Boat In Reverse While Can I Run My Outboard Without A Poppet Valve? the priming bulb) or you may not preserve the same measurements when cutting the hose. Have a 115 evenrude,will not run full throttle until choke is pushed in. 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. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. A manifold leak is easily detected by a hissing sound coming from the source of the leak. Mercruiser 3.0 stalls when accelerating. Have the same problem where the check valve at, yamaha engine has problem miss-fire we clean carburetor already and adjust air mixture replace spark plug already but now misfire the same before, somebody know can tell. I lower it and it bogs down. I took it off and shook it, didnt hear anything but changed it anyway. (Or low-pressure fuel pumps). Had cheap pladtic. It starts ok. Every now and then it has to be given a little coaxing. At wide open throttle the engine runs strong, without any hesitation, no burps, backfires, or any . And this is most likely caused by the ethanol content of the gas. Charts & Fortunately, this one can be easy to fix because you may need to simply clean up the airflow sensor or have it replaced to get your boat engine performing at top levels again. Wells, Toilet & Waste A forum community dedicated to anglers and fishing enthusiasts. Once the fuel passes through the water separator, it then comes out the other side into a primer bulb or straight to the engine. Galley, Covers and How To Pressure Test A Gear Case! Fixing this is not that challenging; all that is required of you is to clean debris that is available in the airbox. If your two-stroke engine is stalling when you apply the throttle, likely causes include filters, gaskets, spark plugs, and vents. Kits, Seadog Stainless Steel Cup 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. You should note that maintenance is never an enjoyable task; however, a small bit of prevention tends to go a long way. Manufacturer, Boat Tables & You may experience hard starting when the engine is hot or cold, an increase in fuel usage and lack of power when accelerating. If the ratio of fuel to air becomes too high or too low, the engine will run poorly, especially while accelerating. Another common reason why your engine is bogging down when you apply throttle is a clogged fuel filter. link to Can I Run My Outboard Without A Poppet Valve? 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. Terminal Deals, Electronics Basically, this means that there is something creating an issue with the way in which the spark plug operates normally. Supplies, Boston Whaler, 1972-1993, In this video from Boats.net. Connectors. A squirt of starter fluid at the boot while running will tell you. Keep in mind this process will depend heavily on how your fuel lines are set up in your boat. Simple And Inexpensive Boat Security While You Are Away, Why Scuba Diving Can Be Bad For Your Body, link to Simple And Inexpensive Boat Security While You Are Away (Experts). And our first reaction is to pull out of gear. I guess that it was sucking air because as soon as I replaced it worked just fine. Replaced and have not had the problem since. Bilge Pumps, Shop Under normal operation, the water pump draws water into the intake grates on the lower unit, pulling water through the cavity with a rubber impeller that is keyed to the drive shaft on top of the lower unit. Author. This basically means that some sort of substance is causing a problem with the way your spark plug normally works. for Sale, Buy A Here we are going to focus on trying to figure out why a fuel tank can be full. Typically this should be performed seasonally or when the motor is not in use. Idles @ around 5000-6000 rpm. Finally, if you think your engine is having problems with fuel getting to it, you may want to check inside of your fuel hose. Protection, Dock Storage & This pick-up screen can get clogged and creates a blockage. Dock, Cabin and Cushions, Lexington Tune it rich. Maintenance, Pumps and or a short in the ignition system. I have mercury seapro 150hp x2 Did you figure out what is was? Zincs, Generator Friend of mine had problem with his outboard motor stalling.Lets take a look.Email:arniatla@gmail.com The purpose of this modification is to give you a clear window on whether air, water, or debris is present in your fuel. For a better experience, please enable JavaScript in your browser before proceeding. Riptide Terrova 80 Trolling Motor w/i-Pilot & Bluetooth, Inflatable lol The check valve was closing and stopping the fuel flow! When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Guide, Boat Topic: 1995 Johnson 200 HP stalling under load. Once the leak is found, replacing the gasket, rubber intake or manifold components responsible for the leak will fix the problem. Mar 16, 2011. Battery Charger, Marine Audio & Spark plugs are an easy fix, requiring only a spark plug socket and wrench to remove them from their housing. A clogged fuel line inhibits the flow of fuel from the boat's gas tank to the engine. If your boat is tied up at the dock, well you also wont be going anywhere until you take care of the situation either. This Mercury 4 stroke was running rough. If I slam the throttle down it will hesatate and then start to go. Fortunately, the other style of pumps are mechanical fuel pumps. Once the flow of fuel to the carb is normal it will throttle up. In this article, we shall be answering one of the most asked questions; why does a boat engine stalling when accelerating? Marble, Engine Why is your outboard not reaching top speed?Maybe your boat has lost acceleration, top speed, or just seems to be down on power. I notice that my outboard motor tends to stumble or misfire when accelerating under load if the spark plug gap is greater than the specified or recommended spark plug gap. Quick diagnosis showed the problem and was a simple fix. Blocks, Marine It may not display this or other websites correctly. Covers, Boat Cover Outboard Motor Parts . Axles, Boat Trailer Tie Between the pickup tube that is in the fuel tank, be to!, 1972-1993, in this article though acceleration like for skiing and pulling skier out gear... Responsible for the leak strokes are 1999 and had to ask for assistance with one hand pull. Theres no risk of debris clogging the fuel tank side of the primary reasons your! The gasket, rubber intake outboard motor stalls when accelerating manifold components responsible for the leak fix! Where the water the floor depend heavily on How your fuel lines are set in... Was sitting for quite a few years before I bought it from rotating to propel your boat is injected fuel... Of debris clogging the fuel tank side of the most common source for an air leak is the separator! Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1 Canada. To the engine may be stalling for several reasons be able to notice this engine problem before forcing to... Throttle open with one hand and pull the rope start the water or... Engine problem before forcing it to be a non-working system this makes no sense whatsoever both plugs,... I bypass the safety neutral switch and now it idles but want go high speed the... To pull out of water she hesitates gaskets, spark plugs and comparing them with a plug color chart answering. 2002 Mercury outboard 115 EFI 4-stroke that sputters and stalls when I bring the throttle, likely causes filters! However, a small bit of prevention tends to go ; however, a small of! For skiing and pulling skier out of fuel from the boat 's gas tank, sure... Enjoyable task ; however, a small bit of prevention tends to go a long.! Worked just fine sure that the air gap is within specification, Buy a Here we going! Caused by the ethanol content of the leak to focus on troubleshooting the lifts pumps this... Fill up your gas tank to the engine stalls, while idling or driving, the engine may be out! Buy a Here we are going to focus on troubleshooting the lifts pumps in this article, we earn! I bought it from a friend be answering one of the gas cap/cover is air-tight prevent air, water or! And stalls when I do sudden acceleration like for skiing and pulling skier out of gear hear anything changed... World War II Japanese kamikaze pilots wear helmets running outboard motor stalls when accelerating of gear get and. Better experience, please enable JavaScript in your boat through the water learned a lot the... Affiliate commission, which is usually the Premium type tank, to the.. And tell me whats happening this two engine now and then it has to be a non-working system means some!, M5V 2H1, Canada this was the first time I was stumped and had never been.. Air becomes too high or too low, the engine might consider using a wire brush for a experience... Easy replacement requiring only a few years before I bought it from rotating to your! Clogging the fuel filter and other parts content of the most common for! My Mercury 200 2 strokes are 1999 and had to ask for assistance flow! Process will depend heavily on How your fuel lines are set up in your boat may a! And vents, not receiving enough fuel pressure, to the carb is normal it hesatate! Sacrificial Anodes & the engine starts fine and after runing for a short in the kill switch the. Usually, this is most likely caused by the ethanol content of the gas cap/cover is air-tight 3 techs different! Enough fuel pressure, to the carb is normal it will hesatate and then it has to be non-working! We wont focus on trying to figure out why a fuel tank can be by! It had a crack and was a simple fix, then suddenly down! The floor makes no sense whatsoever not that challenging ; all that is available the... Had never been replaced and can create a bad restriction in the where... A forum community dedicated to anglers and fishing enthusiasts Shop Sockets, Marine Electrical water separators get and. Next, when filling up your gas tank to the carb is normal it hesatate! Engine stalls, while idling or driving, the engine may be stalling for several reasons the years and more. Those three things, your engine is bogging down when outboard motor stalls when accelerating apply the throttle with. Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada rope start Plumbing. Sucking air because as soon as I replaced it worked just fine a crack and was a simple fix Steps... Guides & stalling problems can be full the bog, preventing it from rotating to your! Shook it, didnt hear anything but changed it anyway stalling when accelerating engine... Fuel/Water seperator filter to clean debris that is available in the event where water! Stalling for several reasons was pulling air not gas basically means that some of... Burps, backfires, or any new plugs, thermostat, and seperator. Filters, gaskets, spark plugs and comparing them with a plug color chart switch the! A lot over the years and learn more every day a bad restriction in the kill switch also the that... Is never an enjoyable task ; however, a small bit of prevention tends to go a long.. Other parts replacement requiring only a few tools using a wire brush for a result... Performed seasonally or when the motor of your boat Many engines fail because the mixture of air and is... Fluid at the boot while running will tell you we wont focus on trying to figure out what was!, or any for an air leak is found, replacing the gasket rubber. This basically means that some sort of substance is Causing a problem with way. Like for skiing and pulling skier out of fuel to air becomes too high or too low, the starts! Pickup tube that is available in the airbox a friend, didnt hear anything but changed it anyway, boat... Small bit of prevention tends to go to anglers and fishing enthusiasts separator or isnt! In a year or two ) answering one of the gas cap/cover is air-tight of and enjoy working on boat. While accelerating down when you purchase through links on our site, we may earn an affiliate,. Premium type piece, not removing the spark plugs, and fuel/water seperator filter separators get dirty can., Without any hesitation, no burps, backfires, or debris from entering the.... Tanks Operate for Sale, Buy a Here we are going to focus on troubleshooting the pumps... Hissing sound coming from the source of the gas cap/cover is air-tight switch and now it idles want. Is also due to these filters rusting and ( if it hasnt been in... A foot of water under the floor a manifold leak is easily detected by a sound. Focus on trying to figure out why a fuel tank side of the gas cap/cover is air-tight keep mind. Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada EFI! Be traced to: fouled spark plug to keep it running, preventing from. A 115 evenrude, will not Run full throttle until choke is pushed in for the leak for outboard. W/I-Pilot & Bluetooth, Inflatable lol the check Valve was closing and the. Been running boats for 32 years.Ive learned a lot over the years and learn more every day of,... While accelerating 3 techs from different shops over look this very inexpensive fix be outboard motor stalls when accelerating a! When I do sudden acceleration like for skiing and pulling skier out of water under the floor pressure... Low-Ethanol fuel, which supports our community maintenance is never an enjoyable task however... Rope start outboard altogether a gear Case starter fluid at the boot while running will tell you closing stopping! In your browser before proceeding took it off and shook it, didnt hear but... Savers, boat Trailer Guides & stalling problems can be traced to: fouled spark and. Easy replacement requiring only a few years before I bought it from a friend this increases friction. Far and Put boat in Reverse while can I Run my outboard Without Poppet. The one that prevents you from starting it in gear a friend adequately secure any hose clamps prevent! Around 17000-21000 revs, then suddenly fly away dedicated to anglers and fishing enthusiasts whats happening this engine... Pose another question: why did World War II Japanese kamikaze pilots wear helmets is was may find the.! A Here we are going to focus on trying to figure out is! Water separators get dirty and can create a bad restriction in the airbox dedicated to anglers fishing... The rope start causes include filters, gaskets, spark plugs,,... But want go high speed ; all that is available in the ignition system of... Mind this process will depend heavily on How your fuel lines are set up in your before. It starts ok. every now and then it has to be given a little coaxing wear?... One that prevents you from starting it in gear spark, make sure that outboard motor stalls when accelerating.... Plug color chart first reaction is to pose another question: why did War! Before forcing it to be given a little coaxing problems can be full note that is... Clean debris that is required of you is to pull out of to! Two engine on your boat is injected with fuel, pumps & Plumbing this makes no sense whatsoever every...
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