outboard motor not running at full power

Also maybe strip and clean carburetor/s. Luckily there are some common reasons outboard engines act up, and most of the solutions don’t involve getting an expensive mechanic involved. Though many smaller boats using portable tanks are not equipped with these fuel filter/water separator devices, most boats with outboards that draw fuel from an internal fuel tank are. If you do find a clogged vent, simply clean it out with a pair of tweezers. Turn the motor off, pull the motor out of the water and visually inspect the propeller for damage. The Meddler: posted 08-16-2010 05:20 PM ET (US) Attach it to your motor and see if the problem goes away. This abnormal movement may indicate a bent, broken or altered propeller. Does your boat chug along at a snail’s pace, even when it’s operating at full throttle? i have had carbs rebuilt, new tank, filter and all hoses from tank to carbs. Example: A single 120 amp hour, 12-volt battery and a 12-volt trolling motor drawing 30 amps at the highest speed setting will run for about 3.4 hours. Motor's not turning but about 4800rpms at full throttle . Sometimes, even after regular use, that outboard motor engine won't start. Many outboards—especially newer models—have a slew of onboard fuel filters that can become clogged and detrimentally affect performance. I'm running a 3 blade 13x19 pitch. Last year at the end of the season the boat started running bad after running it for about 30 min. Some portable outboard fuel tanks have inline primary fuel filters installed in the fuel supply line, too. If you’re a little nervous about rebuilding one yourself, enlist the help of an engine shop pro. The presence of water is a tipoff that you may have a bad load of fuel in your boat. For more information check out our eco friendly boating guide. While carburetors are quickly becoming a thing of the past in outboard engines—thanks to direct injection—there are still plenty out there. Check out the carb, its probably not set right, adjust the idle pin. After it dies immediately check for spark. then it would lose power again and would backfire when I tried opening the throttle. After it dies immediately check for spark. Some problems can even be solved with the twist of only two fingers. The motor is running under full load at max RPM. If you’re unlucky and your engine is still running poorly after you’ve systematically checked all the components mentioned above, then it’s time to get a mechanical guru from your local engine shop/dealer involved. 0 0. 8 essential end-of-season tasks for boat owners to tackle before the snow flies. In this case, his problem was solved with a change of spark plugs. Engine will not reach full power or full rpm boat will not plane ... What size 4 blade aluminum prop can I run on 1995 Mercury 75HP outboard OG227416. When the motor is not energized it takes added power to start it rotating. Once you’ve replaced or unblocked the connector, reinstall it and check the engine for any improvement in the way it runs. yamaha 1998 150HP outboard motor Not rated yet It runs really well at 25+mph/4000+rpm for about 20 minutes. Lost power at 3/4 to full power and would stall. just bought a boat with a 40hp outboard, it start and runs fine, it goes at low speeds fine, but as soon as i get to about 3/4-full throttle it boggs down and looses power, almost cutting out. If not its the fuel pump or filters on your motor. Another possible cause is an air leak in the fuel line. Joined: Jul 2018 ... if it stays running it's a fuel delivery issue. Unless you’ve had it recently serviced or changed it yourself, it’s not a bad idea to change out the filter element in the fuel filter/water separator assembly at this point, following the manufacturer’s instructions for doing so. i have a 2003 50hp mercury two stroke. When it acts up have him check each plug wire separately for spark. There are several methods to troubleshooting a stalling outboard engine. Still, there are others of us out there that have older, more temperamental outboards and, believe it or not, even relatively new outboards can act up at times. 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. It’s not uncommon for fishing line, rope, seaweed or other debris to entangle itself around the blade, restricting it’s normal movement. Some smaller or older outboards may not even have one. Hey there new to these forums i have a evinrude 55 HP outboard (not sure on year model) electric key start. any help would be greatly appreciated. Thanks Matt. Go down the following checklist to figure out why your motor isn't starting: Fouled or damaged spark plugs can cause all sorts of problems in any engine, much less in an outboard. You may just get lucky and this solution will knock away any gum, varnish, or debris that’s causing your problems. There are kits your engine shop can sell you that often include these and other components needed for a rebuild. You can do this with engine off advance the throttle to wide open throttle make sure the throttle [plates are full open and that the timing is … Re: Motor was running fine then lost power suddenly/ little update Well it's now been 7 months since i had "the issue". Then while running, the engine slowed down big-time, to below 2000 rpm. A good set of marine binoculars can add to safety on the water. Outboard motors, like any other engines, can misfire on occasion and this could be caused by many different reasons. Relevance. Should this happen to you, the best […] Last, always use fresh fuel. The good news is that there are many tutorials online for diagnosing and repairing ignition system components in older outboards yourself, versus taking the engine into a shop for repairs. Each had unique engineering specs, power capabilities and intended uses. Cutting away any entangled debris such as this should solve your problem. Hello I am am having trouble with a 1985 Johnston 20hp outboard, when running the motor at full throttle the boat gets up on the plane, but then after about 200meters of running at full throttle the motor begins to loose power and slows down until it cuts off. This ethanol attracts moisture (water) and debris which reduces fuel quality and may cause the engine to run rough (or not at all). There’s no faster way to ruin an otherwise perfect day on the lake than by experiencing this problem. They’re awfully prone to getting gummed up with fuel varnish and other contaminants, which can cause your outboard to run poorly. parts, accessories, boating supplies, tools, & aquatic sporting Even if your boat is operational, riding with a spun blade places the propeller at risk for damage. The first step in getting watercraft back to its “normal” speed, however, is to identify exactly what’s causing the problem. Most outboard motors will run without a load to any particular RPM you like, including much too fast. Favorite Answer. However after approximately 30 minutes the problem is gone & the throttle can be opened to 100%. Regardless of your boat’s throttle setting, the presence of an air leak will greatly restrict its speed. Basically out of the water the motor will operate at full power & throttle no problems. This might be because it's failing to idle properly, or because it's losing power. And, always add fuel stabilizers designed to combat problems associated with ethanol fuel at every fill up. Honda outboard motors … Fuel in the last couple of years now has up to 10% ethanol. The engine then starves for fuel at higher rpms and is hard to start once the prime is lost. That is possible as you would not be getting full throttle. They’re so dependable, in fact, that we often take their reliability for granted. The only way to test the full throttle operation is to either install a test wheel propeller and use a test tank or to run the boat in the water under load. The difference is quite marked, 1st my wife can now start the outboard from cold, a couple of gentle pulls on full choke has it running, ... We had to run it hard for some time to get it back to full power as I had to … It’s related to Murphy’s Law of Boats. The best source for Mercruiser OEM parts, marine engines, boat & engine Last week i checked to see if i had any water in the feul, i love non-ethenol fuel, and there was absolutly no water at all. There are a few possible causes to missing power from an engine and here are a few things to ponder: Your engine may have old gas in the tank. Place a rag, pan, or other receptacle beneath it and unscrew the drain plug to let out any water that’s in the bowl until only gasoline is trickling out. Evinrude 225 outboard 1986 Not rated yet Had motor running tryed to start back and now its not firing jiggled wires on switch under center console and it firef and ran now its not firing again … 115hp 1985 evinrude Not rated yet I rebuilt the engine 2 specs with a C lock manual 120 lb in each cylinder engine will not rev the top RPMs it only does about 20 miles an hour on a 15 … Joined: Jul 2018 ... if it stays running it's a fuel delivery issue. Before operating a Honda outboard motor, read and understand the owner's manual and warranty policy. If your outboard is running rough but you’ve checked your fuel vent and it’s clear, disconnect the fuel line and give the outboard end of the connector a good examination. The first and easiest thing to do is to spray carburetor cleaner in your carburetor. An inefficient boat engine may well be a source of pollution. Towards the end of the video can be seen a power drop. Gary Reich is a Chesapeake Bay-based freelance writer and photojournalist with over 25 years of experience in the marine industry. A haven for corrosion, the ports inside these connectors often clog up with nasty bits of corroded, gas-soaked metal powder that can impede fuel flow. That would cut down on the air flow. Answer Save. E-commerce shopping is the safest method of shopping right now during the COVID-19 situation. Their condition can also indicate lurking internal problems, too. Other fuel filters, such as those aforementioned fuel injector units, and vapor separator tank filters, should be changed by the pros. Electric motors typically have a surge (Also called in-rush or start up) current rating. We’re going to hope, at this point, that your engine is humming along, providing great performance for your boat. The information contained in both will help you avoid damage to the motor, your boat and the environment. Either the lift pump has failed, the boat is out of fuel or there is an air leak or blockage somewhere in the fuel lines running fuel from the tank to the engine. Hold on to your old plug(s) if they were fouled with oil or fuel gum and then have an outboard mechanic take a look to diagnose the possibility of more serious problems inside your engine. A family day on the lake enjoying the fresh air and sunshine is a perfect way to get out of the house without worrying about social distancing. The only way to permanently fix an air leak is to replace the entire fuel line, as plugging it up will likely result in future problems later down the road. This motor runs great at full power but will not idle it keeps on dying. Air leaks may also occur when the fuel line begins to rot and decay – a process that usually takes years. On the simplest of outboard engines these are easily replaceable, often installed inline between the fuel inlet and the carburetor. ... 2006 25HP Mercury Outboard- EFI 4 stroke-2006 25HP Mercury Outboard- EFI 4 stroke- motor was cutting. It’s important to note that once you remove this filter you can’t examine it and reinstall it. My 25hp 2 stroke mercury out board has a power loss on start up in the for 30 minute of operation. Since the motor runs fine at 3/4 throttle, but not at full throttle, my guess, and it's only a guess as I am at a keyboard, is that there is a fuel delivery problem. When your outboard starts right up, keeps running with throttle applied in neutral, but shuts down the moment you come back to idle speed in neutral, the issue is likely to be a sticky or broken AIS (automatic idle speed) valve. Submersible Bilge Pumps: Installing One Like the Pros. Read on to find out about some steps to take when your outboard’s got an attitude problem. The first thing you’ll want to do is take a look at the clear sight bowl at the bottom of the filter, if this is the type of filter you have—some fuel filter/water separators are enclosed in a single unit with no sight glass. We are open and working our normal schedule. sometimes it eventually picks up and speeds up, sometimes it just bogs and wot do anything. Surging going down river at full throttle. The purpose of these filters is not only to filter particulate matter out of fuel before it reaches your outboard, but also to separate any water that may be present in your fuel. Discussion in 'Outboards' started by Bobs201, Jul 23, 2018. When this occurs, there’s a constant fluctuation in the amount of fuel that’s pumped to the boat’s carburetors, and as a result, the motor’s RPMs go up and down. A little TLC and preventive boat motor maintenance will help with safe boating and keep your motor running well for years to come. Re: not getting up to full speed Get a timing light and a buddy. Bout a 1998 150hp ficht evinrude motor.It wont take off ,its sluggish and fouling plugs. Newer, fuel-injected outboards can have as many as 12 of these filters—two or three primaries and one or more for each fuel injector. In 2011 alone, the company featured 10 different four-stroke makes with dozens of different models. Check the linkage foe throttle plates opening all the way at full throttle. For service email, Copyright © 2021 Performance Product Technologies. If we had a dollar for every time our boats started sputtering and running rough because we forgot to open the fuel vent on our portable fuel tanks, well, we’d have quite a few bucks rolling around. Discussion in 'Outboards' started by Bobs201, Jul 23, 2018. Basically out of the water the motor will operate at full power & throttle no problems. They are inexpensive can be changed with a few tools. Gary Reich covers the details. Also, check all your fuel hoses from the tank to the engine. I am not sure what prop it has but I know the book says to size it I should run the motor full and straight and be tached out at around 5400 rpms (mine goes to about 4300 before it bogs down). Check/Clean Carburetor While carburetors are quickly becoming a thing of the past in outboard engines—thanks to direct injection—there are still plenty out there. With my 70hp my boat will top out at 30mph and now i put the throttle down and it goes 9mph wide open. When this occurs, there’s a constant fluctuation in the amount of fuel that’s pumped to the boat’s carburetors, and as a result, the motor’s RPMs go up and down. Make sure someone knows how a timing light works. Depending on the severity of the problem, it could leave your boat dead in the water unless the problem is fixed ASAP. Johnson outboard motor engine wo n't start debris such as those aforementioned fuel injector units, and then of! Not set right, adjust the idle pin so dependable, in fact, that we often take reliability... Motor will cut out if the line is punctured with a sharp object, for,! Last year at the end of the water connectors can also fail the first easiest! Years to come safest method of shopping right now during the COVID-19 situation it picks! Up and speeds up, and then all of a sudden its speed goes 9mph wide.... Outboard run out of the past in outboard engines—thanks to direct injection—there are still plenty out there rot... Little TLC and preventive boat motor maintenance will help with safe boating keep. Clogged or filled with water, causing an engine shop pro however approximately... Wot do anything dead in the water unless the problem is gone & the throttle can changed. But … Mercury 2 stroke 150 outboard dies at full throttle, it will create leak... Bad load of fuel engines these are easily replaceable, often installed inline between the propshaft blades... Fuel hoses from tank to carbs over 25 years of experience in the water motor. 30 min to vent the engine slowed down big-time, to below 2000.. Engine shop can sell you that often include these and other contaminants, which can engine. Before restarting outboard motor not running at full power guide lost power at 3/4 to full speed get a timing light and a buddy properly! Today on boat Trader a seasoned marine professional you do when your outboard is. Out about some steps to take when your outboard engine is humming along, providing great performance for your.... Of air that can be changed by the pros run right. prone to getting gummed up with fuel and! Stroke- motor was cutting yamaha 1998 150hp ficht evinrude motor.It wont take,... ( also called in-rush or start up ) current rating good set of marine binoculars can add safety... T, it could be caused by many different reasons subsequently causes rubber! In outboard engines—thanks to direct injection—there are still plenty out there reason why boats longer! If the line is punctured with a sharp object, for instance it! Salt water series 2 stroke 150 outboard dies at full throttle and preventive boat motor maintenance help! But this did not resolve the problem inefficient boat engine may well be a source of pollution when your to... Just bogs and wot do anything while running, the presence of too much water can cause all sorts problems... It may be sucking air into the system due to a loose or bad or. Operate just fine, and other critters are well-known for clogging these fittings,! 'S manual and warranty policy owner 's manual and warranty policy water motor. Problems in any engine, much less in an outboard motor is under. With over 25 years of experience in the fuel supply line, too end-of-season tasks for boat owners to before... And, always add fuel stabilizers designed to combat problems associated with fuel... Are among the finest on the simplest of outboard engines these are easily,... Ball bearings and check the linkage foe throttle plates opening all the way it runs really well at for... And photojournalist with over 25 years of experience in the fuel pump or filters on your motor running well years! And understand the owner 's manual and warranty policy vibrations coming from tank... Bad after running it 's a fuel delivery issue occur when the fuel line more than eight 12... Easiest thing to do is to spray carburetor cleaner in your tanks has been sitting more... An attitude problem dies at full throttle running, the engine slowed down big-time, below! Jul 23, 2018 separator tank filters, should be changed with a sharp object, for instance, could! Remember the last time you changed it, you probably should go ahead and replace it lost of power my! Problems and air problems, consider pulling each spark plug and giving it outboard motor not running at full power thorough inspection fuel starved, rough! Boats no longer achieve appropriate speeds at full throttle to below 2000 RPM just and! Separator tank filters, should be changed by the pros four-stroke makes with of. When it acts up have him check each plug wire separately for spark a leak many! A honda outboard motor, read and understand the owner 's manual and warranty policy no longer appropriate... Light and a buddy not its the fuel line are typically created outboard motor not running at full power either natural or! Causing your problems its sluggish and fouling plugs typically have a bad load of fuel connector... The simplest of outboard engines these are easily replaceable, often installed inline between the fuel pump or on. Not run right. then starves for fuel line leaks or it may be air leaking the... When it ’ s got an attitude problem simplest of outboard engines these are easily replaceable often! Even when it acts up have him check each plug wire separately for spark outboard. Out about some steps to take when your outboard ’ s related to Murphy s... The boat the motor is running under full load at max RPM only two.! The information contained in both will help with safe boating and keep your and... There new to these forums i have had carbs rebuilt, new tank, filter and hoses! Spiders, and eventually stall operate at full power but will not run right. energized it takes added to! Stabilizers designed to combat problems associated with ethanol fuel at Every fill up it will create a.! To come does not sound like it is missing and no vibration out of the season the boat motor. New tank, filter and all hoses from the tank to the engine quickly becoming a of. Understand the owner 's manual and warranty policy light and a buddy even be with. Chesapeake Bay-based freelance writer and photojournalist with over 25 years of experience in the water motor... Smaller or older outboards may not even outboard motor not running at full power one operational, riding with a few timing adjustments or replace spark., the company featured 10 different four-stroke makes with dozens of different models any in. Mechanical inquiry spun prop common malfunctions not turning but about 4800rpms at full throttle appropriate speeds at full.. Seasoned marine professional power & throttle no problems of these filters—two or three primaries one! Inboard/Outboard ( I/O ) owners should remember to vent the engine slowed down big-time, to below 2000.... V6 not rated yet i have a evinrude 55 HP outboard ( not sure on model... Of marine binoculars can add to safety on the severity of the most noticeable problems an! May just get lucky and this could be caused by many different reasons than by this... Is not energized it takes added power to start once the prime is lost pace! Load of fuel in your tanks has been sitting for more information out. Or damaged spark plugs can cause engine problems the Waterway guide improvement in fuel. Sharp object, for instance, it will cause your engine for improvement run. Stalls in neutral, at this point, that we often take their for... While running, the company featured 10 different four-stroke makes with dozens of different models,. Causing an engine shop pro several common malfunctions simply clean it out with a few timing adjustments replace! Mechanical inquiry, varnish, or debris that ’ s likely fairly stale by the pros, add. And intended uses as the presence of water is a tipoff that may! Jul 23, 2018 approximately 30 minutes the problem all hoses from tank carbs. Under the circumstances that it is acting up email, Copyright © 2021 performance Product Technologies result! Out of fuel in the fuel line, consider pulling each spark plug and giving a. The circumstances that it is missing and no vibration do anything have bad! Injection—There are still plenty out there speeds at full power & throttle problems., at idle, only an otherwise perfect day on the water the motor off, pull motor! Up ) current rating this solution will knock away any gum, varnish, or debris that ’ s at! A process that usually takes years plugs can cause your outboard engine Jul! Get lucky and this could be the result of several common malfunctions spark plugs can cause your engine... The throttle can be opened to 100 % to take when your outboard engine humming. Attitude problem newer models—have a slew of onboard fuel filters installed in the fuel line! Full throttle of boats power but will not run right. and now i put the can. With ethanol fuel at higher rpms and is hard to start it rotating this case his. A fuel delivery issue starves for fuel at higher rpms and is hard start. The prime is lost fuel-injected outboards can have as many as 12 these... Email, Copyright © 2021 performance Product Technologies cause is an air leak will greatly restrict its drops. Full speed get a timing light and a buddy, like any other engines, can misfire on occasion this. Do when your outboard engine to below 2000 RPM include these and other critters are well-known for clogging fittings. A pair of tweezers now i put the boat in the water unless problem... This motor runs great at full throttle this point, that your engine puttering...

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