Many engines fail because the mixture of air and fuel is incorrect. At wide open throttle the engine runs strong, without any hesitation, no burps, backfires, or any . I am having this same trouble ,Im going to try new gas with additive to take out the ethanol, I replaced the fuel lines,filter,checked spark,cleaned up carbs but still bogs a 2/3throttle if new gas doesnt work Im gona try a fuel pump cause it just seems like it isnt getting the fuel it needs. Now running hours is 700h before my boat speed is 4000RPM for 29 knots but now my boat speed reduced 4000RPM For 22 knots. We do lot of water sports and skiing. This process takes maybe 30-40 seconds after startup. Any substance that will get in the sparks electrodes will end up preventing it from producing a strong spark that will ignite air and fuel for the engine to start running.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[336,280],'takeocean_com-large-mobile-banner-2','ezslot_7',108,'0','0'])};__ez_fad_position('div-gpt-ad-takeocean_com-large-mobile-banner-2-0'); Fortunately, this is not a significant problem since you can clean the spark plug or consider replacing them, allowing your engine to start functioning as usual. Or there is an air leak or blockage somewhere in the fuel lines running from the fuel tank to the engine.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[728,90],'bornagainboating_com-medrectangle-3','ezslot_6',106,'0','0'])};__ez_fad_position('div-gpt-ad-bornagainboating_com-medrectangle-3-0'); Its important to remember that there are many different types of lift pumps. In case you are using gasoline mixed with ethanol, it will attract moisture as time progresses. How to Go Green with Your Aquarium and Save the Planet. 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. Shop Quick diagnosis showed the problem and was a simple fix. Your outboard engines ignition system is responsible for igniting the gas, firing up the engine, and keeping it running. My name is Kern and Im passionate about boating. Below you will find several factors that can contribute to the problem and corrective actions to think about. All, Anchor & Tune it rich. Un boat engine stalling on acceleration can become a source of stress for its owner. When it is not operating optimally, you may notice the outboard bogging down when you throttle up or at idle. I have noticed over time that I can push it harder (without stalling) if I trim the motor up. Here we are going to focus on trying to figure out why a fuel tank can be full. These increase the air intake, causing a lean fuel mixture and vacuum pressure problems. His professional work experience includes publication with KOMO 4 News Seattle, Fisher Interactive Network, and Demand Studios. Can You Run An Outboard Without A Poppet Valve? It could be fuel, dirt, or oil its just any substance that could get onto the electrodes in your spark plug that would prevent the spark plug from producing a spark that is strong enough to ignite the air & fuel to actually start your engine. With regular maintenance, you will be able to find issues such as this while still onshore, allowing you to take care of it before sailing into the sea, ocean, or lake. Boat Repair, Boat Paint & Fouled spark plugs result in sporadic fuel ignition because of poor sparking and become more evident under load when the cylinder is saturated with fuel. Accessories, Marine DC Power Plugs Protection, Ladders, Steps, & And start the engine to see if the pump is moving fuel. If it revs you have a vacuum leak. link to Accidentally Put Boat In Reverse While Driving? PFDs, Roof Racks, Carriers, And every time you fill up your gas tank, make sure that the gas cap/cover is air-tight. thank you. Without getting too technical, ethanol causes something called phase separation. Over the years, different kinds of pumps have been used across many different manufacturers and engine models. Oars, Wakeboard, Wakesurf & Ive been running boats for 32 years.Ive learned a lot over the years and learn more every day. If your boat is tied up at the dock, well you also wont be going anywhere until you take care of the situation either. We also participate in programs from eBay, CJ, Clickbank, ShareASale, and other sites. Fixing this is not that challenging; all that is required of you is to clean debris that is available in the airbox. The valves are needed to prevent fuel from siphoning out of the fuel tank. You may also notice your engine vibrating excessively, which is a tell-tale sign that the propeller needs to be checked. Usually, most boat engine tends to stall due to incorrect mixture of fuel and air and so is the spark when you fail to receive it at the right time or to receive a very weak spark. If the engine stalls, while idling or driving, the engine may be running out of fuel. Keep in mind this process will depend heavily on how your fuel lines are set up in your boat. If these three vital aspects are missing, you will never start your engine. This Is What A Break In Period For A Brand New Engine Is! Why is your outboard not reaching top speed?Maybe your boat has lost acceleration, top speed, or just seems to be down on power. This helps indicate that cooling water is flowing. But. Fishing Lures, Fishing Rod Holders & The fuel tank pickup itself could also be corroded, or even broken.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'bornagainboating_com-large-mobile-banner-2','ezslot_20',111,'0','0'])};__ez_fad_position('div-gpt-ad-bornagainboating_com-large-mobile-banner-2-0'); If your boat engine continues to stall, we still need to cover the blockages issue. It starts great and idle's fine but right after it goes in gear it cuts off. Drink Holders. This could be from, not receiving enough fuel pressure, to keep it running. And our first reaction is to pull out of gear. There are several boat engine problems that can be rectified by performing constant maintenance. A forum community dedicated to anglers and fishing enthusiasts. Battery Charger, Marine Audio & Kits, Boat Trailer When it comes to stalling in a boat engine, this issue can give one a headache, especially while you are far from land. My Mercury outboard was bogging and stalling at almost full throttle after about 10 mins of runnin. Parts, Inflatable Ive checked and spark seems good on both plugs. Why does my outboard stall? A small engine like that that idles ok but bogs under acceleration is usually one of three things; 1) air leak at the intake boot. There are several reasons your outboard motor may hesitate upon acceleration. Once removed, be sure to look for any signs of damage. Telescopes, Covers and It will run as long as you only go to about 2/3 throttle. This is going to tell us that there is an air leak coming from somewhere in the boat. The motor start and runs fine without issue. User since 6/19/09. Accidentally Put Boat In Reverse While Driving? Harware, Marine Nuts, Bolts, & And into the bilge in the event the hose coming from the pick up is perforated. What can I do ? On the other hand, things change when it comes to inboard boats where the fuel lines do go below the top of the fuel tank by the time it gets to the engine. Maintenance, Fiberglass & Epoxy We and our partners share information on your use of this website to help improve your experience. Typically this should be performed seasonally or when the motor is not in use. This happens when there is a restriction or block on the fuel tank side of the bulb. This in turn leads to the engine overheating, triggering mechanisms that prevent the engine from functioning at high temperatures. My outboard starts but it wont go in gear either forward or reverse. All, Boat Bimini Pumps, Livewell Aerator Pumps The result is poor acceleration, rough idle and stalling. Hardware, Boat If You Accidentally Go Too Far And Put Boat In Reverse While Can I Run My Outboard Without A Poppet Valve? If the propeller itself is cracked or bent, it needs to be replaced with a matching part. Hitches, & 2. Blocks, Marine I can idle (sometimes it's rough) and putt around, but the engine stalls when I accelerate above 5-6 mph. If you are on a fishing boat, a smaller boat like a pontoon boat, or even a speed boat, you dont want to hear the sounds of a stalling engine. Things can pop up in the water in the way at any moment! GPS Chartplotter and Fish Finder Combo, Find Perform an outboard fuel pump test by removing the spark plug wire boot from the spark plug. Holders, Cabin Accessories & More of the interior liner will degrade over time, causing repeated issues. Sometimes she will stall but not always. Tables, Minn Kota This could also be known as a clogged flame arrestor. This, in turn, causes the fuel pump to work harder and puts strain on your motor. It may not display this or other websites correctly. If the fuse isnt blown. hey folks i hope someone has a answer my 4 hp suzuki 4 stroke idles fine throttles up fine but when you turn throttle all way it starts spurttering does not reach full speed any answers. You need to allow it the time to stabilize to . I have the same issue with my Johnson 50. my 2 stroke yamaha will only idle with the engine in gear in non gear idle it cuts out Suggestions ? Why wont my boat motor go full throttle? Lights, Boat Trailer You must log in or register to reply here. Outboard engines, as with any internal combustion engine, require air, fuel and spark to maintain adequate combustion throughout the power band. While clear line may not last as long as rubber hosing (around one year before needing replacement), clear lines benefits outweigh its drawbacks. My 5hp 4 stroke mercury will do that at first until the choke gets the fuel flow going good. However, depending on when this occurs will determine how inconvenient it will be to you. If this screen is obstructed, it restricts the lift pump from being able to pull the fuel from the fuel tank to your engine! That moisture is going to mix into the gasoline and will dilute the gas which will mess up your mixture and cause your engine to sound like its trying; but it just isnt working out. Maintenance, Boat Cleaners & 74. Just my luck. Filling up the tank entirely is a best practice, as this reduces the amount of air in the tank and the possibility for water to be introduced into the fuel system. By doing so, you will be able to notice this engine problem before forcing it to be a non-working system. Plumbing, Fresh Water Boat Waxes, Boat Cleaning Bilge Pump, Tires, Rims, & Hub BigEars it might be your fuel filter had problems similier to yours replaced fuel/water seperater and filter on motor and made a bid difference for me, I had a similar issue with a 70 evinrude carbs on all 3 cylinders..I would put it in gear and give it a few rpms and then punch itthe issue is the accelerator pumps in the carbs. So if your boat engine keeps stalling, here is some of the best information about what may be causing the problem. . Products, Carbon Monoxide & Mixtures that have too much air and not enough fuel are lean and tend to reduce the amount of power available under load and can cause stalling. The purpose of this modification is to give you a clear window on whether air, water, or debris is present in your fuel. Galley, Covers and Systems, Marine Plumbing Theres an easy method to checking and replacing spark plugs in your outboard motor: If you dont have a good spark, the spark plug caps or ignition coil leads could be causing the issue. Covers, Boat Cover Hardware, Boat Seats by 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. if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[580,400],'bornagainboating_com-mobile-leaderboard-1','ezslot_24',114,'0','0'])};__ez_fad_position('div-gpt-ad-bornagainboating_com-mobile-leaderboard-1-0'); Aaron has been working in the Marine Industry for over a decade and holds certifications for Yamaha and Mercury Marine. It ended up being the fuel line connector at the motor. 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.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[728,90],'bornagainboating_com-box-3','ezslot_3',105,'0','0'])};__ez_fad_position('div-gpt-ad-bornagainboating_com-box-3-0'); There are several methods to troubleshooting a stalling outboard engine. To start the season, i replaced Thermostats, Plugs, Rebuild Carbs, New carb bowls. Debris such as fishing line, excessive seaweed, beer can rings, or nearly any other material can wrap around the propeller and its spindle. 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. Deals, Camping & RV However, if you dont have a damaged system, this becomes a relatively easy issue to tackle. This increases the friction and causes the bog, preventing it from rotating to propel your boat through the water. Cable, Marine Batteries & The symptoms that several have described is exactly what is happening on my Merc right now. However, if this doesnt solve the issue, the next step is to check the ECM output peak voltage, as well as the condition of other electrical components like the electric oil pump and oil level sensor. First, carefully remove anything that may be wrapped around the propeller. Spark plugs are responsible for the ignition of fuel in the cylinder but will eventually foul in response to carbon buildup from normal combustion of oil in the cylinder. 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. To stabilize to both plugs outboard was bogging and stalling of runnin do that at first until choke... 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