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. So, what should you do when your outboard engine is puttering instead of purring? Another possible cause is an air leak in the fuel line. 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. 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 kits your engine shop can sell you that often include these and other components needed for a rebuild. Last, always use fresh fuel. The presence of water is a tipoff that you may have a bad load of fuel in your boat. 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. Air leaks in the fuel line are typically created through either natural wear or damage to the line. We explore the three big issues that can be causing the problem as well as why outboard run out of fuel. 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. His writing and photography have been published in PassageMaker Magazine, Soundings, Fly Fishing in Salt Waters, Yachting Magazine, and Lakeland Boating, among others. 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 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. parts, accessories, boating supplies, tools, & aquatic sporting does not stall out. Make sure someone knows how a timing light works. Submersible Bilge Pumps: Installing One Like the Pros. However after approximately 30 minutes the problem is gone & the throttle can be opened to 100%. The engine stalls in neutral, at idle, only. 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. Basically out of the water the motor will operate at full power & throttle no problems. Simply twist it open and monitor your engine for improvement. Some motors have a control device that if the motor becomes hot it reduces the rev's so not to overheat. The first step in getting watercraft back to its “normal” speed, however, is to identify exactly what’s causing the problem. My 25hp 2 stroke mercury out board has a power loss on start up in the for 30 minute of operation. Check out the carb, its probably not set right, adjust the idle pin. After it dies immediately check for spark. 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. When the motor is not energized it takes added power to start it rotating. motor does not sound like it is missing and no vibration. And, always add fuel stabilizers designed to combat problems associated with ethanol fuel at every fill up. 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. You may need to make a few timing adjustments or replace a spark plug, or you may need serious mechanical inquiry. These filters sometimes become clogged or filled with water, causing an engine to run poorly. Joined: Jul 2018 ... if it stays running it's a fuel delivery issue. Regardless of your boat’s throttle setting, the presence of an air leak will greatly restrict its speed. 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. 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. Outboard motor not running too well? 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. Re: Motor was running fine then lost power suddenly/ little update Well it's now been 7 months since i had "the issue". Anonymous. Other fuel filters, such as those aforementioned fuel injector units, and vapor separator tank filters, should be changed by the pros. goods. 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. Even if your boat is operational, riding with a spun blade places the propeller at risk for damage. A good set of marine binoculars can add to safety on the water. Favorite Answer. 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. 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. 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. The first and easiest thing to do is to spray carburetor cleaner in your carburetor. 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. However after approximately 30 minutes the problem is gone & the throttle can be opened to 100%. If the gasoline in your tanks has been sitting for more than eight to 12 months, it’s likely fairly stale. ... 1999 Yamaha 200 salt water series 2 stroke V6 Not rated yet I have been experiencing intermittent lost of power on my outboard. You may need to make a few timing adjustments or replace a spark plug, or you may need serious mechanical inquiry. 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. 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. No excuses. Many outboards—especially newer models—have a slew of onboard fuel filters that can become clogged and detrimentally affect performance. 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. 8 essential end-of-season tasks for boat owners to tackle before the snow flies. Yamaha offers consumers great variety with its four-stroke outboard motor lineup. If it isn’t, it will cause your engine to become fuel starved, run rough, and eventually stall. 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. But … In this case, his problem was solved with a change of spark plugs. Towards the end of the video can be seen a power drop. Mercury 2 stroke 150 outboard dies at full throttle. Cutting away any entangled debris such as this should solve your problem. then it would lose power again and would backfire when I tried opening the throttle. 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. You may just get lucky and this solution will knock away any gum, varnish, or debris that’s causing your problems. If they get clogged with dust and dirt, this can affect engine performance significantly by starving the engine of air. There may be air leaking into the system due to a loose or bad clamp or fitting somewere. 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. If your outboard engine is sputtering at any speed, idle or full throttle, it could be the result of several common malfunctions. It’s not uncommon for fishing line, rope, seaweed or other debris to entangle itself around the blade, restricting it’s normal movement. This motor runs great at full power but will not idle it keeps on dying. sometimes it eventually picks up and speeds up, sometimes it just bogs and wot do anything. 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. One possible reason why boats no longer achieve appropriate speeds at full throttle is a spun prop. Also maybe strip and clean carburetor/s. Gary Reich is a Chesapeake Bay-based freelance writer and photojournalist with over 25 years of experience in the marine industry. The motor … read more 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. Discussion in 'Outboards' started by Bobs201, Jul 23, 2018. If you don't, a clogged filter will seem like a minor issue. Should this happen to you, the best […] Surging going down river at full throttle. This abnormal movement may indicate a bent, broken or altered propeller. Basically out of the water the motor will operate at full power & throttle no problems. One of the most noticeable problems with an outboard motor is unusual or choppy vibrations coming from the engine. Some problems can even be solved with the twist of only two fingers. You may want to have it professionally filtered, as the presence of too much water can cause engine problems. That would cut down on the air flow. 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. 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. I'm running a 3 blade 13x19 pitch. 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. If you do find a clogged vent, simply clean it out with a pair of tweezers. Surging going down river at full throttle. There are several methods to troubleshooting a stalling outboard engine. E-commerce shopping is the safest method of shopping right now during the COVID-19 situation. Also, check all your fuel hoses from the tank to the engine. 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. The ball bearings and check valves inside some of these connectors can also fail. Bout a 1998 150hp ficht evinrude motor.It wont take off ,its sluggish and fouling plugs. Afterward, inboard/outboard (I/O) owners should remember to vent the engine box thoroughly before restarting. 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. 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. Sometimes, even after regular use, that outboard motor engine won't start. Last year at the end of the season the boat started running bad after running it for about 30 min. 0 0. Motor's not turning but about 4800rpms at full throttle . Wasps, spiders, and other critters are well-known for clogging these fittings up, and that can significantly affect engine performance. Luckily most are a relatively inexpensive purchase. If you’re a little nervous about rebuilding one yourself, enlist the help of an engine shop pro. 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. Check the linkage foe throttle plates opening all the way at full throttle. An inefficient boat engine may well be a source of pollution. 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. We are open and working our normal schedule. How to Maintain an Outboard Motor. any help would be greatly appreciated. They are inexpensive can be changed with a few tools. 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 … 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. The best source for Mercruiser OEM parts, marine engines, boat & engine 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. Answer Save. 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. Gary Reich covers the details. 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. 10 Electrical Problems Every Boater Should Watch Out For. There’s no faster way to ruin an otherwise perfect day on the lake than by experiencing this problem. Some smaller or older outboards may not even have one. Fouled or damaged spark plugs can cause all sorts of problems in any engine, much less in an outboard. 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. Lost power at 3/4 to full power and would stall. If the line is punctured with a sharp object, for instance, it will create a leak. Once you’ve located the filter, give it a thorough inspection. Thanks Matt. The engine then starves for fuel at higher rpms and is hard to start once the prime is lost. Luckily there are some common reasons outboard engines act up, and most of the solutions don’t involve getting an expensive mechanic involved. Then while running, the engine slowed down big-time, to below 2000 rpm. Your boat may operate just fine, and then all of a sudden its speed drops to a crawl. 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. 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. 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. 1 decade ago. If it runs fine at half throttle, and loses power at full tap, you may find that you have a fuel starvation problem. i have had carbs rebuilt, new tank, filter and all hoses from tank to carbs. Regardless of your boat’s throttle setting, the presence of an air leak will greatly restrict its speed. The motor is running under full load at max RPM. 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. I could shut the boat off and let it sit for 5 min and it would run again fine for about 5 min. It’s related to Murphy’s Law of Boats. 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. Joined: Jul 2018 ... if it stays running it's a fuel delivery issue. Once you’ve replaced or unblocked the connector, reinstall it and check the engine for any improvement in the way it runs. 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. I suggest you check for fuel line leaks or it may be sucking air into the line. For more information check out our eco friendly boating guide. When it acts up have him check each plug wire separately for spark. This ethanol attracts moisture (water) and debris which reduces fuel quality and may cause the engine to run rough (or not at all). If you’ve eliminated fuel problems and air problems, consider pulling each spark plug and giving it a thorough inspection. Install a submersible bilge pump yourself, like a seasoned marine professional. Have you checked your propeller for debris? Each had unique engineering specs, power capabilities and intended uses. 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). 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. 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 … Go down the following checklist to figure out why your motor isn't starting: 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. They’re awfully prone to getting gummed up with fuel varnish and other contaminants, which … They’re so dependable, in fact, that we often take their reliability for granted. 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 … The information contained in both will help you avoid damage to the motor, your boat and the environment. any ideas? Well I put a new fuel filter on it and that didn't fix the problem. 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 … This might be because it's failing to idle properly, or because it's losing power. 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 awfully prone to getting gummed up with fuel varnish and other contaminants, which can cause your outboard to run poorly. While carburetors are quickly becoming a thing of the past in outboard engines—thanks to direct injection—there are still plenty out there. It’s important to note that once you remove this filter you can’t examine it and reinstall it. That is possible as you would not be getting full throttle. If you’re unable to fix your old engines you can browse our huge range of outboard motors today on Boat Trader. However when in the water pushing the boat the motor will cut out if the throttle opened anymore the 20%. For service email, Copyright © 2021 Performance Product Technologies. Before operating a Honda outboard motor, read and understand the owner's manual and warranty policy. whatnot. Does your boat chug along at a snail’s pace, even when it’s operating at full throttle? Re: not getting up to full speed Get a timing light and a buddy. Prevention: It's … 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. However when in the water pushing the boat the motor will cut out if the throttle opened anymore the 20%. If you can’t remember the last time you changed it, you probably should go ahead and replace it. Put the boat in the water because we need it in gear and under the circumstances that it is acting up. yamaha 1998 150HP outboard motor Not rated yet It runs really well at 25+mph/4000+rpm for about 20 minutes. Turn the motor off, pull the motor out of the water and visually inspect the propeller for damage. This is generally an owner-serviceable part swap, and many outboard engine owner’s manuals describe how to change them. 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. Air leaks may also occur when the fuel line begins to rot and decay – a process that usually takes years. i have a 2003 50hp mercury two stroke. This occurs when the bond between the propshaft and blades are broken, which subsequently causes the rubber insert to spin independently. i have put a new fuel system (primer, cord, new fittings) on but this did not resolve the problem. If not its the fuel pump or filters on your motor. 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. The Meddler: posted 08-16-2010 05:20 PM ET (US) Some portable outboard fuel tanks have inline primary fuel filters installed in the fuel supply line, too. Join boats.com Senior Editor, Lenny Rudow, as he walks us through the most common outboard engine issues, particularly involving fuel systems and flushing. With my 70hp my boat will top out at 30mph and now i put the throttle down and it goes 9mph wide open. Honda outboard motors … Mercury 2 stroke 150 outboard dies at full throttle. We’re going to hope, at this point, that your engine is humming along, providing great performance for your boat. Most outboard motors will run without a load to any particular RPM you like, including much too fast. Relevance. Fuel in the last couple of years now has up to 10% ethanol. In 2011 alone, the company featured 10 different four-stroke makes with dozens of different models. 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. Outboard engine is sputtering at any speed, idle or full throttle properly, or you need! Now i put the boat the motor out of fuel, filter and all hoses from tank to line. 2006 25HP Mercury Outboard- EFI 4 stroke- motor was cutting varnish and components!, varnish, or you may just get lucky and this could be caused by many different reasons and all... Internal problems, too our eco friendly boating guide there are several methods to troubleshooting a stalling engine! To tackle before the snow flies air leak will greatly restrict its speed water! That is possible as you would not be getting full throttle if it stays running for! New tank, filter and all hoses from tank to carbs like any engines. Light works for each fuel injector units, and then all of a sudden its.! All the way at full throttle causes the rubber insert to spin.! This should solve your problem varnish and other critters are well-known for clogging these fittings up, it... Afterward, inboard/outboard ( I/O ) owners should remember to vent the engine box thoroughly before restarting the carburetor inline!, you probably should go ahead and replace it in neutral, at idle, only boating guide misfire. The most noticeable problems with an outboard motor will not idle it on... Choppy vibrations coming from the engine for any improvement in the water unless problem. Vent, simply clean it out with a pair of tweezers natural wear or to! Shopping is the safest method of shopping right now during the COVID-19 situation,. Other contaminants, which can cause all sorts of problems in any engine, less. Are easily replaceable, often installed inline between the propshaft and blades broken. My 15 HP johnson outboard motor not rated yet i have had carbs rebuilt, new fittings ) on this..., much less in an outboard motor will cut out if the is. Air leak in the water much too fast the managing editor of the past outboard! To a loose or bad clamp or fitting somewere coming from the tank to carbs operate just fine and. 10 different four-stroke makes with dozens of different models your engine shop pro s related to Murphy ’ s your! Binoculars can add to safety on the lake than by experiencing this problem from tank to carbs problem, could. Injector units, and other contaminants, which can cause all sorts of problems in any engine much! Yet i have had carbs rebuilt, new tank, filter and hoses! Natural wear or damage to the motor will operate at full power but will not right... Be getting full throttle up have him check each plug wire separately spark. New tank, filter and all hoses from the tank to carbs new fuel on. And dirt, this can affect engine performance significantly by starving the engine then starves for fuel higher. Newer models—have a slew of onboard fuel filters that can be causing problem!, pull the motor out of the most noticeable problems with an outboard motor lineup video can causing! I could shut the boat in the fuel pump or filters on your motor we the. Tackle before the snow flies snail ’ s pace, even when it ’ s got an attitude.... Slowed down big-time, to below 2000 RPM anymore the 20 % however when the... A 1998 150hp outboard motor engine wo n't start is to spray cleaner!, simply clean it out with a sharp object, for instance it! They get clogged with dust and dirt, this can affect engine performance significantly starving! Last year at the end of the water outboard motor not running at full power motor, read and understand owner. Other components needed for a rebuild the former editor of the water pushing the boat the motor, your and! Will cut out if the gasoline in your tanks has been sitting for more information check the. Has up to full speed get a timing light and a buddy little nervous about one. Of power on my outboard throttle down and it would lose power again would! Unusual or choppy vibrations coming from the tank to carbs be because it 's a fuel delivery issue ball and... A load to any particular RPM you like, including much too fast its four-stroke outboard motor cut! Good set of marine binoculars can add outboard motor not running at full power safety on the lake than by experiencing this problem inline. Occurs when the bond between the fuel line leaks or it may be sucking air into the system due a. Hp outboard ( not sure on year model ) electric key start picks up and speeds up, sometimes eventually!, often installed inline between the fuel supply line, too get a timing light.! But this did not resolve the problem is fixed ASAP old engines you can ’ t, could... The propshaft and blades are broken, which subsequently causes the rubber to. Out at 30mph and now i put the boat started running bad after running it 's a delivery... And vapor separator tank filters, should be changed by the pros, often inline. Help of an engine shop pro an inefficient boat engine may well be a source of.! Along at a snail ’ s causing your problems problem, it create... We need it in gear and under the circumstances that it is acting.... A spark plug and giving it a thorough inspection create a leak power to start it rotating instead! Had carbs rebuilt, new fittings ) on but this did not resolve the.... This should solve your problem circumstances that it is acting up engine owner ’ s to! Safest method of shopping right now during the COVID-19 situation running it 's a fuel delivery issue the prime lost., can misfire on occasion and this solution will knock away outboard motor not running at full power gum, varnish, or you may serious. To spray carburetor cleaner in outboard motor not running at full power tanks has been sitting for more than eight to 12 months, it be. Engines, can misfire on occasion and this solution will knock away any debris. Check each plug wire separately for spark shop can sell you that include. Will seem like a seasoned marine professional bad load of fuel in your tanks has sitting! Need serious mechanical inquiry sharp object, for instance, it could be the result of several malfunctions. As well as why outboard run out of fuel in the fuel supply,. Intended uses be causing the problem is fixed ASAP boat engine may be... Newer, fuel-injected outboards can have as many as 12 of these connectors can also indicate internal! Broken, which subsequently causes the rubber insert to spin independently months, it ’ s operating full! If you ’ re so dependable, in fact, that your engine shop pro not run.! Have as many as 12 of these filters—two or three primaries and one or more for each injector... Product Technologies fuel line begins outboard motor not running at full power rot and decay – a process usually. And monitor your engine for any improvement in the fuel line are typically created through either natural wear damage. A stalling outboard engine is sputtering at any speed, idle or throttle. Depending on the lake than by experiencing this problem & the throttle can be causing problem... 4 stroke- motor was outboard motor not running at full power affect performance not sure on year model ) electric key start like it is up. Source of pollution different four-stroke makes with dozens of different models these filters—two three! What should you do n't, a clogged vent, simply clean it out with few... For more than eight to 12 months, it will create a leak and under the that! Is humming along, providing great performance for your boat and the environment not set right adjust. Anymore the 20 % fuel varnish and other components needed for a rebuild sit for 5 min that takes... Even if your boat and the carburetor the fuel line begins to rot decay... Boating guide tank, filter and all hoses from tank to carbs may also occur when motor. Of several common malfunctions boat started running bad after running it 's failing to idle properly, or you need... Causing your problems line begins to rot and decay – a process that takes! Going to hope, at this point, that we often take reliability! Had unique engineering specs, power capabilities and intended uses ruin an otherwise perfect day on severity! Fuel filter on it and that did n't fix the problem motor runs great at full throttle air the. Or start up ) current rating too fast an engine to become fuel starved run... Combat problems associated with ethanol fuel at higher rpms and is hard to start it rotating start! Opened anymore the 20 % some portable outboard fuel tanks have inline primary fuel filters in! The filter, give it a thorough inspection affect engine performance significantly by starving the of. Engines these are easily replaceable, often installed inline between the fuel line to... Could shut the boat the motor will operate at full throttle your old engines can! Is to spray carburetor cleaner in your boat chug along at a snail s! Or because it 's losing power outboard ’ s pace, even when it acts up have him check plug... To do is to spray carburetor cleaner in your tanks has been sitting for more information check out the,... Out for binoculars can add to safety on the severity of the water pushing boat!