The engine starts fine and after runing for a while full. To start and run properly, your marine boat engine needs three things: air, fuel, and a spark to ignite the air and fuel. Next, remove the spark plug with a plug socket and wrench. Winches, Boat Motor Supports & Usually, this is part of the boat that tends to deteriorate as time progresses, and it will cause lots of stalling. It was just serviced and starts and ideals great but when I put it into gear and accelerate it dies. thank you. It could be fuel starvation. I have an 89 Yamaha 50LF , I have rebuilt carbs, several times and then payed 800 too have them rebuilt. Then I turn off the choke. I had same issue with bogging, rebuild carburetors ,new plugs, same issue . Over time, the fuel filter becomes brittle and may even leak gasoline. Ventilation, Interior & Cabin 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 ? Transom If You Accidentally Go Too Far And Put Boat In Reverse While Can I Run My Outboard Without A Poppet Valve? Options. 123 Main Street Outboard engines are popular in small watercraft because of their light weight and wide range of size for both low and high power applications. Tackle Boxes, Fishing Bait & This Is What A Break In Period For A Brand New Engine Is! Same problem, go only 5mph try to go faster it dies . Your outboard motor has poor idle performance. then you feel a little vibration while the rpm fluctuates.. To fix it, youll want to get rid of any debris inside of the air box, usually a wire brush will be good enough to do the trick. Deals, Paint & Maintenance Many engines fail because the mixture of air and fuel is incorrect. My outboard starts but it wont go in gear either forward or reverse. A manifold leak is easily detected by a hissing sound coming from the source of the leak. In an engine a reluctance to accelerate when under load could be caused by a poor spark. Un boat engine stalling on acceleration can become a source of stress for its owner. Video, GPS Chartplotters & While it might seem like bad luck, it may be related to the gas that you are using. Forums, Find The first things you should look at trying when your boat engine keeps stalling are: If these easier fixes dont work, you may want to try some mechanic work and check your: Hey there! In case you are using gasoline mixed with ethanol, it will attract moisture as time progresses. All of these kinds of problems can mean that you may want to take a look at your entire engine system if you start to experience them from time to time. You need to allow it the time to stabilize to . or a short in the ignition system. Acessories, Fishing Outriggers & This problem is often experienced by boat owners who have their boats stored on land and away from water. Re: hesitation/stalling on slow acceleration, CREATE As mentioned in the previous section, the interior liner of the fuel hose is often the source of debris infiltrating your fuel system. We put a brand new carburetor on it and new plugs and it fired up just fine. I took it in to a mechanic and he said he adjusted the carbs and everything seemed fine replaced the impeller and it only runs worse now. Simple And Inexpensive Boat Security While You Are Away, Why Scuba Diving Can Be Bad For Your Body, link to Simple And Inexpensive Boat Security While You Are Away (Experts). Adjust the air gap if needed. And if you would like to support us to continue bringing you great content, please click the link below to Amazon where we get a commission from anything you are already going to buy! Honda 5hp Outboard, Boat Remove the gasket under the carburetor, then remove the screws on the bottom of the carburetor, and pull the bottom off. I have a 1989 Mercury Mariner 25 HP. Happened to me. If your outboard will not throttle up, the impeller is the likely culprit. Be sure to perform this test in the water or attach a freshwater source to prevent overheating your engine. If your outboard motor will not throttle up, the issue may be as simple as a tangle. Even a poppet valve! This leads to a hose barb that feeds the fuel to one of two places. Why or what do you think the problem is? My engine will only idle when I give it the gas , very low idle. MondayFriday: 9:00AM5:00PM This is the same idea as what powers your vehicle on land as well, so you can rely on some experience you have there as well although the systems may not be completely the same. A clogged fuel line inhibits the flow of fuel from the boat's gas tank to the engine. Bilge Pumps, Shop it would stall and bog while trying to get underway. Now, remove the gasket and the diaphragm, and install a new gasket with a new diaphragm. Over the years, different kinds of pumps have been used across many different manufacturers and engine models. If your engine keeps stalling, it is not going to be a great situation no matter what happens. Boat, Sell A This basically means that some sort of substance is causing a problem with the way your spark plug normally works. Breakers, Power Packs & Jump It would be best if you considered staying on top when it comes to low compression in the boats engine to help in preventing it from becoming faulty and stalling with accelerating.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[336,280],'takeocean_com-mobile-leaderboard-2','ezslot_19',113,'0','0'])};__ez_fad_position('div-gpt-ad-takeocean_com-mobile-leaderboard-2-0'); You may also like: Simple And Inexpensive Boat Security While You Are Away. If the troubleshooting guide above provided no results, consult a mechanic. 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. I have mercury seapro 150hp x2 I have a 50 hr yamaha outboard motor ,start great idle well,clean filter and all other part check and replace if needed .. but i put in water give some throttle work great and all off a sudden die down the only thing i didnt replace was hose and gas tank it a 2005 , could it be that hose or gas worn out please help frustrated lol, i forgot to mention when i squeeze the bulb it work again for a bit. Deals, Dealer How To Pressure Test A Gear Case! If not rectified within time, it will end up causing engine failure if it goes bad.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[336,280],'takeocean_com-mobile-leaderboard-1','ezslot_18',125,'0','0'])};__ez_fad_position('div-gpt-ad-takeocean_com-mobile-leaderboard-1-0'); When your boat engine starts stalling when accelerating, you should consider looking at include; When you give these easy fixes a try and fail to work, you might consider performing some mechanic check and working on it. This should not be adjusted until the engine is warmed up and in forward gear, after being run at full throttle for 2-3 minutes. Problems with the delivery of any of these combustion components can cause an engine to stall while under acceleration. If I push the throttle up more quickly, the initial hesitation is very slight and it never stalls. When it comes to your boat engine running out of fuel, there are three big issues that can be causing the problem. A stalling boat engine is likely caused by: A bad spark plug Clogged air box Bad fuel Low compression Bad airflow sensor Bad carburetor Damaged fuel line Basically, you're going to have to isolate the problem and try to figure out what is giving you this massive headache. Pumps, Livewell Aerator Pumps 3. One problem that more boats are having these days is a bad airflow sensor. & Circuit A good tip to keep in mind: Always check to see if you have extra fuel hose at whichever station you are checking next. It idles fairly well but a bit rough at times. I've changed out all the gas, gas filter, spark plugs, fuel line, took off the prop to see if there was anything wrapped around the shaft and changed the lower unit oil, but still doesn't work. 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. Application is as simple as pouring the allotted dosage into your fuel tank based on the capacity of fuel. Finally, if you think your engine is having problems with fuel getting to it, you may want to check inside of your fuel hose. First, look at the telltale hole, which emits a small, visible stream of water from the outboard motor. Covers, Boat Cover Parts, Sacrificial Anodes & And are only required if the fuel lines from the top of the tank go below the top of the tank. Caulking, Marine Engine Once there it will stay running smooth and properly. If you check this area before you use your boat; you should be able to combat the effects of an engine that is stalling due to poor air flow through the air box. I have a 140hp nissan outboard everything runs fine until I get to about 3/4 throttle then an alarm goes off and no power and backfires and help would be awesome. Seats, Fishing Boat Rails, Marine Tools & Tool And this is most likely caused by the ethanol content of the gas. Troubleshooting an electric low-pressure pump can be as simple as turning the key switch to the on position. & Aug 2, 2013 I have a 2000 Johnson 70 hp oil injected outboard. My symptom is that the motor stall when I try to accelerate. He is a current Pre-Med student at Walla Walla University. Instruments, VHF Radios & Dock, Cabin and 90 outboard mercury 2 stroke bogs down and runs rough when air/carb cover on . I bypass the safety neutral switch and now it idles but want go high speed. 1983 Mercury 115 HP outboard stalls/dies after revving up to about 1200 RPM - but only when trying to accelerate in forward or reverse gear. Because of the isolated nature of operating a boat; you definitely want to stay on top of this part of your engine to prevent it from stalling out at a bad time. Why wont my boat motor go full throttle? A loss of vacuum pressure can also be detected, during acceleration, with a vacuum gauge attached. Causing the stall under load. . I adjusted the idel screws and throttle cable. Furniture, Boat Seat Pedestals & Basically, this means that there is something creating an issue with the way in which the spark plug operates normally. & Rings, Prop Nut Kits & Simple And Inexpensive Boat Security While You Are Away (Experts). Covers, Boat Wiring & Tables, Minn Kota The main difference is that there are usually fewer cylinders, operating in either a two-stage or four-stage cycle. Guide, Boat such a great article thanks If you have a good spark, make sure that the air gap is within specification. Another issue that may be causing your boat engine to stall is an air box that is dirty. This is normally due to there being an air leak or blockage of some sort located somewhere. Fortunately, the other style of pumps are mechanical fuel pumps. There are several boat engine problems that can be rectified by performing constant maintenance. Inside, you may notice accumulated particles, which may point to what type of material is getting into your fuel lines. Lighting, Marine Teak First, carefully remove anything that may be wrapped around the propeller. This is because a rich fuel mixture is over-saturated with gas, causing ignition problems. Engine just revs. The truth is that when your outboard will not throttle up, theres plenty you can do to fix the most common issues and improve performance once and for all. If it is in bad condition, you will need to swap out the old impeller with a new matching part. (7 Reasons)if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[250,250],'takeocean_com-medrectangle-3','ezslot_13',102,'0','0'])};__ez_fad_position('div-gpt-ad-takeocean_com-medrectangle-3-0');if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[250,250],'takeocean_com-medrectangle-3','ezslot_14',102,'0','1'])};__ez_fad_position('div-gpt-ad-takeocean_com-medrectangle-3-0_1');.medrectangle-3-multi-102{border:none!important;display:block!important;float:none!important;line-height:0;margin-bottom:15px!important;margin-left:auto!important;margin-right:auto!important;margin-top:15px!important;max-width:100%!important;min-height:250px;min-width:250px;padding:0;text-align:center!important}. Kits, Boat Trailer If this screen is obstructed, it restricts the lift pump from being able to pull the fuel from the fuel tank to your engine! Vinyl, Floating Boat Sounds like a bad coil. Sometimes she will stall but not always. Oh each mechanic rebuilt the carbs. A closed or blocked air vent on the fuel tank. Boarding, Paddles & At this point in troubleshooting though. This is going to tell us that there is an air leak coming from somewhere in the boat. This is also due to these filters rusting and (if it hasnt been changed in a year or two). Terminal Biminis, RV & Trailer Using gloves and a small container to catch any spilling gas, carefully remove the cover of the fuel filter. Therefore, you should consider checking your airbox while on shore before you start sailing. thanks. Always do a compression test before and after repairing the fuel pump. It was just serviced and starts and ideals great but when I put it into gear and accelerate it dies. These valves are usually found on older boats built a few years back. Tune it rich. Ropes, Boat We have been working in the marine industry for over a decade and will do what we can to help you enjoy more time on the water on your boat! Well move straight to the fuel tank pick up and see whats going on there. Thread starter BRUSA10; Start date Oct 27, 2014; B. BRUSA10 New member. 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. As it attracts moisture, it will end up mixing with gasoline, which, in turn., will dilute the gas, messing the mixture causing your engine to produce a sound like it is operating while in real sense its not.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[250,250],'takeocean_com-narrow-sky-1','ezslot_20',111,'0','0'])};__ez_fad_position('div-gpt-ad-takeocean_com-narrow-sky-1-0'); To ensure that you are not using old gasoline, you should consider performing regular maintenance on the engine boat. 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. Fortunately, this one can be easy to fix because you may need to simply clean up the airflow sensor or have it replaced to get your boat engine performing at top levels again. I turned around and went back in and the engine stalled when I brought it back to idle while trying to dock. 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. I have the same problem with my 1993 150 hp suzuki. When it is not operating optimally, you may notice the outboard bogging down when you throttle up or at idle. It ended up being the fuel line connector at the motor. If there is any debris wrapped around the impeller, remove it completely and look for any signs of damage (such as scarring, bending, grooving melting). I had this problem 2 yrs ago, went through the whole fuel system but never thought about the primer bulb. I just took off the full pump and the diaphragm seems intact its a lil worn but Im thinking thats not it. To help prevent this from occurring, you should consider maintaining your engine regularly. There is a more complex troubleshooting method where we identify the kind of vacuum the fuel pump has. Axles, Boat Trailer Tie Well start the engine and then you will want to keep an eye out for air bubbles flowing through the clear hose! Is It Ok To Use Ethanol Gas In A Boat? With a stalling boat, maneuverability becomes challenging, which makes this a serious topic. This makes no sense whatsoever. Without getting too technical, ethanol causes something called phase separation. My 5hp 4 stroke mercury will do that at first until the choke gets the fuel flow going good. 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