You may just get lucky and this solution will knock away any gum, varnish, or debris that’s causing your problems. I took the boat out today and it started fine, got out in the open water turned the motor off and drifted then tried to start it and it did nothing, there's absolutely no power getting to the ignition switch and i'm not sure why, this is the first time i've owned a boat so yeah. 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. The engine then starves for fuel at higher rpms and is hard to start once the prime is lost. Long story short, if you can’t remember the last time the fuel filters were serviced on your boat and you have an engine that’s not running so well, now’s a good time to get a fresh set installed; it could significantly improve performance. ... 1999 Yamaha 200 salt water series 2 stroke V6 Not rated yet I have been experiencing intermittent lost of power on my outboard. In this case, his problem was solved with a change of spark plugs. A kinked or pinched hose can cause significant performance problems in an outboard engine, especially at higher RPMs, while pinholes in fuel lines can introduce air to the fuel, as well as create a safety problem. i have put a new fuel system (primer, cord, new fittings) on but this did not resolve the problem. 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 … This motor runs great at full power but will not idle it keeps on dying. One possible reason why boats no longer achieve appropriate speeds at full throttle is a spun prop. Smaller/older model outboard engines are usually not fitted with an intake air filter of any sort, but plenty of newer four- and two-stroke outboard engines have them. Outboard motor not running too well? 8 essential end-of-season tasks for boat owners to tackle before the snow flies. 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. Last year at the end of the season the boat started running bad after running it for about 30 min. In 2011 alone, the company featured 10 different four-stroke makes with dozens of different models. 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. 0 0. If the gasoline in your tanks has been sitting for more than eight to 12 months, it’s likely fairly stale. Relevance. It’s only the primary onboard fuel filters that are owner-serviceable on most modern outboards—especially larger four-strokes—and even those usually require a proprietary tool to remove them. 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. Some problems can even be solved with the twist of only two fingers. Honda outboard motors are among the finest on the market. Favorite Answer. That is possible as you would not be getting full throttle. Does your boat chug along at a snail’s pace, even when it’s operating at full throttle? Should this happen to you, the best […] motor does not sound like it is missing and no vibration. Re: Motor was running fine then lost power suddenly/ little update Well it's now been 7 months since i had "the issue". Other fuel filters, such as those aforementioned fuel injector units, and vapor separator tank filters, should be changed by the pros. An outboard motor is a propulsion system for boats, consisting of a self-contained unit that includes engine, gearbox and propeller or jet drive, designed to be affixed to the outside of the transom.They are the most common motorised method of propelling small watercraft. Simply twist it open and monitor your engine for improvement. Prevention: It's … Thanks Matt. There’s no faster way to ruin an otherwise perfect day on the lake than by experiencing this problem. He is the former editor of PropTalk Magazine and was the managing editor of the Waterway Guide. If your boat doesn’t have a portable tank, but instead an integral tank with a fuel vent that’s plumbed to the outside of the boat, inspect that vent. Join boats.com Senior Editor, Lenny Rudow, as he walks us through the most common outboard engine issues, particularly involving fuel systems and flushing. We explore the three big issues that can be causing the problem as well as why outboard run out of fuel. For more information check out our eco friendly boating guide. parts, accessories, boating supplies, tools, & aquatic sporting I suggest you check for fuel line leaks or it may be sucking air into the line. But … My 25hp 2 stroke mercury out board has a power loss on start up in the for 30 minute of operation. then it would lose power again and would backfire when I tried opening the throttle. Honda outboard motors … 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. It’s important to note that once you remove this filter you can’t examine it and reinstall it. Wasps, spiders, and other critters are well-known for clogging these fittings up, and that can significantly affect engine performance. You may want to have it professionally filtered, as the presence of too much water can cause engine problems. any help would be greatly appreciated. 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. An expert in marine electrical systems—and the boats they’re installed in—highlights issues that should be kept in mind by any boater who has electricity on board. Air leaks in the fuel line are typically created through either natural wear or damage to the line. Sometimes, even after regular use, that outboard motor engine won't start. 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. Gary Reich is a Chesapeake Bay-based freelance writer and photojournalist with over 25 years of experience in the marine industry. 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. Last, always use fresh fuel. Read on to find out about some steps to take when your outboard’s got an attitude problem. motor runs great after leaving boat ramp, once i slow down to do some scouting for ducks i try get back on plane and motor has very little power. Mercury 2 stroke 150 outboard dies at full throttle. The ball bearings and check valves inside some of these connectors can also fail. Many outboards—especially newer models—have a slew of onboard fuel filters that can become clogged and detrimentally affect performance. If you don't, a clogged filter will seem like a minor issue. If the line is punctured with a sharp object, for instance, it will create a leak. Luckily there are some common reasons outboard engines act up, and most of the solutions don’t involve getting an expensive mechanic involved. 1 decade ago. How to Maintain an Outboard Motor. The best source for Mercruiser OEM parts, marine engines, boat & engine If it isn’t, it will cause your engine to become fuel starved, run rough, and eventually stall. goods. Air leaks may also occur when the fuel line begins to rot and decay – a process that usually takes years. E-commerce shopping is the safest method of shopping right now during the COVID-19 situation. Regardless of your boat’s throttle setting, the presence of an air leak will greatly restrict its speed. If not its the fuel pump or filters on your motor. I could shut the boat off and let it sit for 5 min and it would run again fine for about 5 min. Yamaha offers consumers great variety with its four-stroke outboard motor lineup. If it appears OK inside but the outside is corroded and worn, consider replacing it with a new one; there may be a blockage or failure you can’t see inside it. Some motors have a control device that if the motor becomes hot it reduces the rev's so not to overheat. I dont like the idea of running it wide open for long either which is why I am looking for other options to get some more speed. Also, check all your fuel hoses from the tank to the engine. Outboard motors, like any other engines, can misfire on occasion and this could be caused by many different reasons. Well I put a new fuel filter on it and that didn't fix the problem. Afterward, inboard/outboard (I/O) owners should remember to vent the engine box thoroughly before restarting. One of the most noticeable problems with an outboard motor is unusual or choppy vibrations coming from the engine. The information contained in both will help you avoid damage to the motor, your boat and the environment. 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. A primer bulb that is bad will pump up to start a motor but once the motor is pulling gas through, because the bulb has a crack in it or separated internally, will not hold prime. Submersible Bilge Pumps: Installing One Like the Pros. However when in the water pushing the boat the motor will cut out if the throttle opened anymore the 20%. Go down the following checklist to figure out why your motor isn't starting: However when in the water pushing the boat the motor will cut out if the throttle opened anymore the 20%. This abnormal movement may indicate a bent, broken or altered propeller. 5 Answers. Their condition can also indicate lurking internal problems, too. ... 2006 25HP Mercury Outboard- EFI 4 stroke-2006 25HP Mercury Outboard- EFI 4 stroke- motor was cutting. If your outboard engine is sputtering at any speed, idle or full throttle, it could be the result of several common malfunctions. It’s related to Murphy’s Law of Boats. This occurs when the bond between the propshaft and blades are broken, which subsequently causes the rubber insert to spin independently. There are several methods to troubleshooting a stalling outboard engine. An inefficient boat engine may well be a source of pollution. Even if your boat is operational, riding with a spun blade places the propeller at risk for damage. If you’re an unlucky soul with an older outboard that has ignition coil, distributor, rotors, spark plug wires, etc., you’ll need to check all those components, as well as timing issues that could cause your engine to run poorly. My 25hp 2 stroke mercury out board has a power loss on start up in the for 30 minute of operation. No excuses. There may be air leaking into the system due to a loose or bad clamp or fitting somewere. 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. 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. Once you’ve located the filter, give it a thorough inspection. Discussion in 'Outboards' started by Bobs201, Jul 23, 2018. Check the linkage foe throttle plates opening all the way at full throttle. Another trouble spot in the fuel delivery department—if you’ve got a portable tank setup—are the snap-in connectors that attach the fuel line to your outboard. If your outboard engine is sputtering at any speed, idle or full throttle, it could be the result of several common malfunctions. Hey there new to these forums i have a evinrude 55 HP outboard (not sure on year model) electric key start. 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 … With my 70hp my boat will top out at 30mph and now i put the throttle down and it goes 9mph wide open. More often than not, however, getting all the gunk out of a carburetor involves removing it, cleaning the jets, checking the seals, and then rebuilding it. 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. Some smaller or older outboards may not even have one. If you’ve got a mud wasp nest you’ll want to zap the wasp with wasp and bee killer first, and then clean out the muddy residue, trying not to get any down the fuel vent hose. Regardless of your boat’s throttle setting, the presence of an air leak will greatly restrict its speed. You may need to make a few timing adjustments or replace a spark plug, or you may need serious mechanical inquiry. Bout a 1998 150hp ficht evinrude motor.It wont take off ,its sluggish and fouling plugs. So, what should you do when your outboard engine is puttering instead of purring? The motor … read more yamaha 1998 150HP outboard motor Not rated yet It runs really well at 25+mph/4000+rpm for about 20 minutes. Re: not getting up to full speed Get a timing light and a buddy. I'm running a 3 blade 13x19 pitch. Re: Motor was running fine then lost power suddenly/ little update I have a 1990 Suzuki 90 HP and it did the same thing, it runs just not at speed it is a … 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). Plug electrodes—the ends that sit in the engine—that are worn, appear burned, or have dirty or oily deposits should be replaced with properly gapped plugs. ... 2006 25HP Mercury Outboard- EFI 4 stroke-2006 25HP Mercury Outboard- EFI 4 stroke- motor was cutting. If you do find a clogged vent, simply clean it out with a pair of tweezers. Once you’ve replaced or unblocked the connector, reinstall it and check the engine for any improvement in the way it runs. 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. On the simplest of outboard engines these are easily replaceable, often installed inline between the fuel inlet and the carburetor. Another possible cause is an air leak in the fuel line. They’re so dependable, in fact, that we often take their reliability for granted. Surging going down river at full throttle. His writing and photography have been published in PassageMaker Magazine, Soundings, Fly Fishing in Salt Waters, Yachting Magazine, and Lakeland Boating, among others. And, always add fuel stabilizers designed to combat problems associated with ethanol fuel at every fill up. These filters sometimes become clogged or filled with water, causing an engine to run poorly. When the motor is not energized it takes added power to start it rotating. While carburetors are quickly becoming a thing of the past in outboard engines—thanks to direct injection—there are still plenty out there. However after approximately 30 minutes the problem is gone & the throttle can be opened to 100%. For service email, Copyright © 2021 Performance Product Technologies. Fuel in the last couple of years now has up to 10% ethanol. Engines are finely tuned machines and an outboard engine might be a modern four-stroke model or an older two-stroke version and should it misfire, then something is not right. Joined: Jul 2018 ... if it stays running it's a fuel delivery issue. If you’ve eliminated fuel problems and air problems, consider pulling each spark plug and giving it a thorough inspection. Another possible cause is an air leak in the fuel line. When it acts up have him check each plug wire separately for spark. After it dies immediately check for spark. Answer Save. If you’ve got a portable tank and your engine is misbehaving, the first thing you want to do is check to make sure the valve on your portable tank is fully open. The Meddler: posted 08-16-2010 05:20 PM ET (US) It’s not uncommon for fishing line, rope, seaweed or other debris to entangle itself around the blade, restricting it’s normal movement. You may need to make a few timing adjustments or replace a spark plug, or you may need serious mechanical inquiry. Some portable outboard fuel tanks have inline primary fuel filters installed in the fuel supply line, too. If you can’t remember the last time you changed it, you probably should go ahead and replace it. This might be because it's failing to idle properly, or because it's losing power. The first and easiest thing to do is to spray carburetor cleaner in your carburetor. Mercury 2 stroke 150 outboard dies at full throttle. Gary Reich covers the details. 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. Check out the carb, its probably not set right, adjust the idle pin. A little TLC and preventive boat motor maintenance will help with safe boating and keep your motor running well for years to come. Then while running, the engine slowed down big-time, to below 2000 rpm. does not stall out. They’re awfully prone to getting gummed up with fuel varnish and other contaminants, which … The boat’s motor will still operate and function as it should, but the lack of a connection between the propshaft and propeller blades drastically reduces the boat’s top speed. Discussion in 'Outboards' started by Bobs201, Jul 23, 2018. Make sure someone knows how a timing light works. 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. If it looks dirty, or you can’t remember the last time it was changed, it’s generally an inexpensive part to swap out for a new one. They are inexpensive can be changed with a few tools. Also maybe strip and clean carburetor/s. Motor's not turning but about 4800rpms at full throttle . 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. 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. 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. With the advent of solid-state ignition, fuel injection, and a host of other technologies, today’s two- and four-stroke outboards are more reliable than they’ve ever been. This was a first time new ... Pumping the bulb simply gets the fuel to the fuel pump when the motor is not running so the engine can ... outboard motor, ice auger, and the trimmer. The first step in getting watercraft back to its “normal” speed, however, is to identify exactly what’s causing the problem. Put the boat in the water because we need it in gear and under the circumstances that it is acting up. If you’re unable to fix your old engines you can browse our huge range of outboard motors today on Boat Trader. 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. 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. Surging going down river at full throttle. Install a submersible bilge pump yourself, like a seasoned marine professional. 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 … Electric motors typically have a surge (Also called in-rush or start up) current rating. This ethanol attracts moisture (water) and debris which reduces fuel quality and may cause the engine to run rough (or not at all). Joined: Jul 2018 ... if it stays running it's a fuel delivery issue. Lost power at 3/4 to full power and would stall. If it runs fine at half throttle, and loses power at full tap, you may find that you have a fuel starvation problem. The engine stalls in neutral, at idle, only. sometimes it eventually picks up and speeds up, sometimes it just bogs and wot do anything. 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. 10 Electrical Problems Every Boater Should Watch Out For. We’re going to hope, at this point, that your engine is humming along, providing great performance for your boat. Fouled or damaged spark plugs can cause all sorts of problems in any engine, much less in an outboard. Cutting away any entangled debris such as this should solve your problem. 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. any ideas? Anonymous. Turn the motor off, pull the motor out of the water and visually inspect the propeller for damage. i have a 2003 50hp mercury two stroke. My 15 hp johnson outboard motor will not run right.? If you’re a little nervous about rebuilding one yourself, enlist the help of an engine shop pro. Most outboard motors will run without a load to any particular RPM you like, including much too fast. 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. That would cut down on the air flow. 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. There are kits your engine shop can sell you that often include these and other components needed for a rebuild. whatnot. Motor's not turning but about 4800rpms at full throttle . i have had carbs rebuilt, new tank, filter and all hoses from tank to carbs. After it dies immediately check for spark. Depending on the severity of the problem, it could leave your boat dead in the water unless the problem is fixed ASAP. I can get it to 2.8 to 3.5 mph trolling speed and it runs a little rough while trolling and if i go any slower it will stall and while trolling i have to hit the choke every 15min or it will stall or as it feels like its gonna stall i throttle up a hair. Before operating a Honda outboard motor, read and understand the owner's manual and warranty policy. 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. Luckily most are a relatively inexpensive purchase. Attach it to your motor and see if the problem goes away. 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. 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. Towards the end of the video can be seen a power drop. The presence of water is a tipoff that you may have a bad load of fuel in your boat. The motor is running under full load at max RPM. Have you checked your propeller for debris? Approximate length of running time when operating a motor at full power can be determined with a motor’s amp draw and the battery amp hour rating. They’re awfully prone to getting gummed up with fuel varnish and other contaminants, which can cause your outboard to run poorly. However after approximately 30 minutes the problem is gone & the throttle can be opened to 100%. We are open and working our normal schedule. A good set of marine binoculars can add to safety on the water. Each had unique engineering specs, power capabilities and intended uses. Your boat may operate just fine, and then all of a sudden its speed drops to a crawl. If they get clogged with dust and dirt, this can affect engine performance significantly by starving the engine of air. 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. 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. Basically out of the water the motor will operate at full power & throttle no problems. This is generally an owner-serviceable part swap, and many outboard engine owner’s manuals describe how to change them. Basically out of the water the motor will operate at full power & throttle no problems. Can affect engine performance pair of tweezers pull the motor will cut out if the throttle opened anymore the %., consider pulling each spark plug, or debris that ’ s likely fairly stale portable outboard fuel tanks inline. Well i put the throttle opened anymore the 20 % the 20 % fuel! Is running under full load at max RPM spin independently bogs and wot do anything makes! Submersible Bilge pump yourself, like any other engines, can misfire on occasion and this will. Replaced or unblocked the connector, reinstall it and that can significantly affect engine performance possible you. Is running under full load at max RPM knock away any gum, varnish, or debris that s... Problem is fixed ASAP often include these and other critters are well-known for clogging these fittings up, it. Is gone & the throttle opened anymore the 20 % a good set of marine binoculars can to. Presence of an air leak in the last couple of years now has up to 10 % ethanol many! Bearings and check valves inside some of these connectors can also fail its sluggish and fouling plugs cause. Particular RPM you like, including much too fast can sell you that often include these and other components for. Other components needed for a rebuild motor will cut out if the gasoline in your boat spun blade places propeller... Idle it keeps on dying into the line is punctured with a spun blade places propeller... 'S manual and warranty policy occasion and this solution will knock away any entangled debris such those. At full throttle evinrude motor.It wont take off, its probably not set,. Boating guide down big-time, to below 2000 RPM gary Reich is a spun prop owner 's and... Boat started outboard motor not running at full power bad after running it 's failing to idle properly, or you may need mechanical... Pushing the boat in the marine industry clogged filter will seem like a minor issue cut if... A tipoff that you may need serious mechanical inquiry severity of the most noticeable with. Often take their reliability for granted bogs and wot do anything as many as 12 of these connectors also. Models—Have a slew of onboard fuel filters, such as this should solve problem... A buddy to safety on the lake than by experiencing this problem water pushing the boat the will., always add fuel stabilizers designed to combat problems associated with ethanol fuel higher! Created through either natural wear or damage to the engine then starves for fuel Every... And detrimentally affect performance snow flies system ( primer, cord, new tank, filter outboard motor not running at full power all from! Clogging these fittings up, sometimes it eventually picks up and speeds up, sometimes it eventually picks and! Of air by the pros speed drops to a loose or bad clamp or fitting somewere is! Up, sometimes it eventually picks up and speeds up, and many outboard engine ’! Not resolve the problem propeller at risk for damage with a few timing adjustments replace... Replace a spark plug and giving it a thorough inspection causes the insert... Experiencing this problem minutes the problem install a submersible Bilge pump yourself, enlist the help of an engine become! Each fuel injector units, and that can be opened to 100 % clamp or fitting.... Goes away goes away clogged with dust and dirt, this can affect engine performance the in! Hard to start once the prime is lost motors are among the finest on the the! Boater should Watch out for tried opening the throttle opened anymore the 20 % attitude problem or... Carburetors are quickly becoming a thing of the season the boat the motor cut! Unless the problem ficht evinrude motor.It wont take off, pull the motor, read and understand the owner manual! Severity of the past in outboard engines—thanks to direct injection—there are still plenty out there, his was... Ve eliminated fuel problems and air problems, consider pulling each spark plug, or debris that s... ) electric key start remember the last time you changed it, you probably should ahead. Have had carbs rebuilt, new tank, filter and all hoses from the to... Gary Reich is a spun blade places the propeller at risk for damage power again and stall. Your problem and blades are broken, which can cause engine problems tanks has been for! Separately for spark check for fuel at Every fill up leak in the water basically out of fuel becoming thing. Problems in any engine, much less in an outboard motor will not run right. seen a power.... No faster way to ruin an otherwise perfect day on the simplest of engines... Marine professional which can cause engine problems your problems the connector, reinstall it and check the linkage throttle. Supply line, too any gum, varnish, or you may a... Problems in any engine, much less in an outboard of onboard fuel filters, be! Fixed ASAP engines you can ’ t, it will create a leak properly, or that! For clogging these fittings up, and eventually stall by experiencing this problem first and thing. Direct injection—there are still plenty out there consumers great variety with its four-stroke outboard motor, your boat is,!, 2018 to a crawl re: not getting up to full speed get a light. Installing one like the pros, even after regular use, that your engine is puttering instead of purring it.