#1. And yet this engine is a beauty in all other modes of operation. The color of the smoke is a valuable clue in finding the cause of the problem. When compared, the highest reading from each cylinder should be within 10 percent of the readings of every other cylinder. Always check to see that all the gas tank vents are not obstructed in any way. If so, move the tank and replace the fuel. While the motor is running, watch the exhaust cloud. 2 strokes smoke a lot and it seems like its excessive especially if youre doing it on a trailer in a garage or street Rob M MikeinNJ13 Recruit Joined Finally, the problem may come from a leak in the cooling circuit. ProX put together a list of 12 key things to keep your 2-stroke running strong. Have you checked your plugs after running that cleaner through? ive tried cleaning carbs, sparkplugs, found broke fuel lines, and cloged telltale line. If it dissipates quickly, it is condensation. Record the compression each time you crank the engine. Seaboard Marine delivers Guaranteed Better Than Factory Performance, Parts, Design, and Engineering for Cummins and other Marine Diesel applications. This would reoccur after 24-48 hour shut-down and the sequence of this obnoxious white smoke would slowly get worse over the next few hundred hours. Another not-so-funny thing that can cause white smoke from your exhaust pipe is a cracked cylinder head or engine block. Brands have designed boat engines that smoke to protect them! But these are the very reasons that, before the temperature comes up to a certain level, can cause an unacceptable level of white smoke. Check the condition of the glow plugs and air intake heater. When I'm idling, or putt-putting, a lot of smoke comes out with the exhaust. GUIDE: How to fix a stalling boat engine? (all these have help it alot but still having the issue with white smoke and uneven idle) thank for the help. You may also like: Are Scuba Diving Tanks Filled With Regular Air? There is no getting around it and there is no real hardcore fix to change this. Copyright 2019 - 2023 | Captain ocean Since my initial experiences with white smoke in the late eighties, I can honestly say that I havent seen any direct failures of components that have led to any white smoke issues that always seemed to be a concern. Two Stroke engines burn oil. That should be able to get rid of the smoke. Replacing an air filter is very simple - you don't even need a tool on most 2-stroke outboards. White smoke from the exhaust of any internal combustion engine is cause for concern. It is common to see a 2 stroke outboard motor smoking when the engine starts. 6. Turn on the water and start the engine. Finally, the problem may be wear on the scraper rings or carbon buildup on the valves. You will have to put the engine in neutral and clean the propeller. No strings attached. 07-15-2021, 10:12 AM. Keeping a proper gap on a spark plug will ensure you get the hottest spark possible. If the drops evaporate, do not touch the riser; the exhaust manifold requires replacement. Let's take a look at some of the most common reasons why your outboard motor is smoking. So the gaskets have been replaced in the last 3 years. I changed my boat engine recently and it smokes white. That in that makes the oil to be sucked into the crankcase lubricating the engine. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. JavaScript is disabled. The way the motor operates is by mixing oil into the fuel, either at the carburetors or by injecting it into the reed plates; which gets sucked into the crankcase and lubricates the engine. 5. Outdoor Hub, LLC (d/b/a Carbon Media Group), 30800 Telegraph Rd, Suite 1921, Bingham Farms, MI 48025 USA. If the lack of temperature comes from an external element such as the air temperature, then you can heat the engine artificially. Retarded (incorrect) ignition timing. 1. What is white smoke? There is no doubt in my mind that within ten years, I will see many of these engines with 20,000+ hours on them and the heads will have never been off. . If you notice a large cloud of blue-tinged smoke pouring out of your exhaust port, then there's a good chance you've got an improper balance of fuel and oil. It achieves the optimum ratio between fuel and air increasing engine efficiency. In the meantime, the owner can mitigate this problem by adding temperature to the engine through a block/coolant heater, oil pan/pad heater, or an air heater. If your 2-stroke boat engine smokes blue, you need to check the oil level in the case of a recent oil change. This is one of the most common reasons why 2-stroke outboard motors smoke. So during a few outings at sea, don't worry if your boat engine smokes white. The engine actually appears to be running smoothly at all RPM's, cruises w/o effort at 4000-42000 RPM. The design limitations of a mechanical fuel injection system limit this optimization somewhat, although do offer some other advantages. There are two scenarios in which an outboard motor smokes white: In 90% of cases, white smoke is a sign that the outboard motor is venting water vapor. The only concerning thing is that it does it at wot more than at idle from what I can tell. A water leak in the gasket or cylinder can also be the reason your boat motor is smoking. If your outboard engine smoke is not its usual colour, it may signal a problem. Whether you sail on a speedboat, an inflatable boat, a semi-rigid, a yacht, a fishing boat, a sailboat or even a dinghy, we are all afraid of an engine failure at the most delicate moment. Boat motors, especially two-strokes, commonly smoke because of an improper fuel to oil ratio or when the motor runs rich on fuel. What Causes a Two Stroke Engine to Smoke? 6 Common Issues This type of smoke is mostly noticed in the morning when it is cold. Cummins released the 6BTA 250 around 1987 and this was an upgrade of the 6BT 210. Should water coming out of outboard be hot? What causes EXCESSIVE smoking of a 2 stroke? 5. dbracci. We will discuss this later in more detail. If you dont have a gap gauge, then you can check at your local automotive store. Even if the leak can come from any duct, there is a good chance that the problem lies with the cylinder head gasket. Problem- white smoke, maybe steam (didnt know the difference before reading on here) coming out the exhaust. That means the outboard will tear and wear more when compared to other types of engines.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'takeocean_com-large-mobile-banner-1','ezslot_2',108,'0','0'])};__ez_fad_position('div-gpt-ad-takeocean_com-large-mobile-banner-1-0');if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'takeocean_com-large-mobile-banner-1','ezslot_3',108,'0','1'])};__ez_fad_position('div-gpt-ad-takeocean_com-large-mobile-banner-1-0_1');.large-mobile-banner-1-multi-108{border:none!important;display:block!important;float:none!important;line-height:0;margin-bottom:7px!important;margin-left:auto!important;margin-right:auto!important;margin-top:7px!important;max-width:100%!important;min-height:250px;padding:0;text-align:center!important}. How to fix a boat engine that smokes white? If a seal is no longer tight then water will seep into the cylinder of the marine engine. You can also use synthetic oils that smoke less. 12 Tips to Help Keep Your 2-Stroke Running Strong - ProX Racing Parts The engine starts up OK and IDLES AND RUNS AT . Tilting can cause the oil to build up in the cylinders, and then when you start it up, you will see smoke from boat motor.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[320,50],'takeocean_com-leader-1','ezslot_5',106,'0','0'])};__ez_fad_position('div-gpt-ad-takeocean_com-leader-1-0'); To fix the tilting problem, trim the engine up to a 45-degree angle and then let it sit there for a little while. During winter, when boats are in storage, rodents can build nests in exhaust outlets, hence blocking airflow, leading to the engine not starting. An outboard motor mechanic should be your next call. If the smoke does not dissipate after warming up the 2-stroke outboard motor, you have a problem. If your 2-stroke boat engine smokes black, you need: If your 2-stroke boat engine continues to smoke black after checking everything, then contact a mechanic. #1 my 50hp mercury is blowing white smoke, it has a bog sometimes in high idle, and the telltale stream is hot not steaming but hot. Low inlet air temperature. You should also check if there is any blockage to the pumps as that can also cause damage. Ensure that you get rid of all the old fuel that has ethanol when you keep your motor for a season. Technically, the white color is caused by the light-scattering characteristics of the re-condensed droplets of fuel (un-burned or partially burned) larger than one micron. And finally, we share the solutions to implement to repair your 2-stroke boat engine depending on the causes.if(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[728,90],'captain_ocean_com-box-3','ezslot_2',108,'0','0'])};__ez_fad_position('div-gpt-ad-captain_ocean_com-box-3-0'); Analyzing the fumes coming out of your marine engine is a good thing. Follow your motor manufacturers specifications when setting the gap. While it is expensive, it is a small price to pay for a more pleasant day on the water. A quick test can help decide if you have an excessive smoke problem or if it is simply water vapor. The causes of a 2-stroke boat engine that smokes black are multiple: If your white smoked 2 stroke boat engine, you need :if(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[300,250],'captain_ocean_com-large-mobile-banner-1','ezslot_12',112,'0','0'])};__ez_fad_position('div-gpt-ad-captain_ocean_com-large-mobile-banner-1-0'); If none of these solutions work, stop the marine engine immediately and contact a mechanic. Of course, during the first few minutes of running, the operator wished it wasnt running, as clouds of white smoke would billow from the exhaust. We and our partners use cookies to Store and/or access information on a device. The engine would start to suffer from slow start-up with one or two cylinders initially firing. Since this is a boat and marine diesel forum, and, white smoke seems to come with the territory, Ill first start by giving you about twenty years of personal experience with white smoke. 2 Stroke Outboard - Excessive smoking? - Winnipesaukee Forum How to Fix a Boat Engine That Stalls at Idle, Repairing an outboard motor that stalls on acceleration, I have a very old boat engine that smokes white, I have white smoke coming out of my outboard motor on start up. If the oil pressure and temperature remain within the normal operating range, reduce your speed and proceed to the nearest dock or marina by the shortest route possible. Our top pick for the best 2-stroke oil is the Lucas Oil Semi-Synthetic 2-Cycle Oil. The diffraction of light transforms drops of more than one micron into white smoke. Re: Cause of excessive smoke from 2 strokes. After the engine is warm, pick up a few drops of water with your hand and drop them onto the engine's exhaust riser. All rights reserved. How can I make my 2 stroke more powerful? Once the motor gets warmed up, less smoke will be made. The reason the problem went away after five to ten minutes was that sufficient temperature within the engine itself allowed enough (complete) combustion to make the problem go away. That is just a fact of life. It is mainly due to exhaust buildup, which causes fuel to burn and produce smoke. On the new Cummins engines that I install, like the 350 C, white smoke at start-up can be of concern in many circumstance. A stuck open injector will give out a bad smell with smoke; a dead one, on the other hand, will make the engine start when cold but not when warm. A two-stroke engine mower can emit blue or white smoke during mowing. Do not worry: it is only water vapor that forms at low pressure when the outboard motor is idling! I've tried to adjust the oil linkage rod (I have the Mikuni oil pump). Other than the fuel system, its the temperature again that is the common denominator. Part of regular maintenance should include inspecting the plugs. Have it inspected promptly before starting or using it again. Maintaining the batteries of your boat is vital as it affects both the performance and increases service life. We also participate in programs from eBay, CJ, Clickbank, ShareASale, and other sites. You dont have to worry about the smoke with that type of engine as it happens to all outboard motorboats. White smoke occurs as a result of combustion temperature being so low that only partial combustion occurs and the partially burned fuel that exits the exhaust is in the form of a white vapory smoke. Finally, after what seemed like an eternity (actually, about thirty seconds or so) all six cylinders would finally catch and the engine was running. Is it a four-stroke or a two-stroke type of machine? At that point I started to wonder, why does my boat motor smoke and what can I do to fix it? We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. That will help the engine cool down as it will heat the water and then pump it back into the lake. To fix overheating, use the water you are on and pour it into the engine cooling passageway. The oil injection has now been bypassed. A common mix ratio is 50:1. The Fora platform includes forum software by XenForo. Test the cylinder head gasket first. To test whether it is a big problem or just water vapor, you will have to run the motor and then watch the exhaust cloud. They all can suffer the same, and YES, some individual engines are worse than others. Came home and changed impeller and gaskets (the gaskets were bad) and both thermostats. These piston cooling nozzles have many advantages such as significant fuel economy, much longer engine life (thanks to more efficient temperature control), and much lower NOx emissions ( therefore a much less polluting boat engine). What makes a 2-cycle outboard smoke? - Lake-Link Why Does My Boat Motor Smoke Fishing Duo A proper gap on the spark plug will ensure that you get the hottest spark possible. how much smoke is normal for a 2 stroke? If you have tried to repair the gap, but there is no success, you should buy a new one.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[320,50],'takeocean_com-leader-2','ezslot_8',125,'0','0'])};__ez_fad_position('div-gpt-ad-takeocean_com-leader-2-0'); If your boat motor is producing a lot of smoke, there is always a reason to worry. 1 2 Next dylans503 Posted July 2, 2008 i have a 1994 kx 250, most likely needs a top end, and ive heard that when rings are bad it pushes oil up and burns the oil and cause bikes to smoke, ive also heard its cause by bad jetting and ive also heard its caused by a bad crank seal whats the dealio? This temporary over-greasing is necessary so as not to damage the cylinders of the outboard. We hope that you have found this article beneficial and that we have answered the question; Troubleshooting a Smoking Boat Motor: 8 Causes And Fixes. If a seal is no longer tight then water will seep into the cylinder of the marine engine. Another possible cause is a problem with the injection pump. The root of this problem is typically a leaking cylinder . Excessive engine smoke on startup - Yamaha Outboard Parts Forum Check if there is a leak in the cooling circuit. link to How To Choose And Install a High-Performing Boat Battery Charger? Thanks for taking the time. Boat motors, especially two-strokes, commonly smoke because of an improper fuel to oil ratio or when the motor runs rich on fuel. A forum community dedicated to Small Skiff owners and enthusiasts. A retired ship captain, Charpentier holds a doctorate in applied ocean science and engineering. I always have them serviced by a professional mechanic each fall. The causes of a 2-stroke boat engine that smokes white are multiple: A blue smoking 2 stroke boat engine is a sign of a lot of oil in the combustion chamber. if(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[250,250],'captain_ocean_com-leader-4','ezslot_19',141,'0','0'])};__ez_fad_position('div-gpt-ad-captain_ocean_com-leader-4-0');Finally, know that you just have to change the model to forget white smoking boat engine problems. White smoke may mean water or vapor. Two stroke motors stay lubricated by forcing oil directly into the combustion chamber. Many outboards have two idle adjustment screws that are used in combination to achieve the proper mix of air and fuel. However, it produces a very large puff of white smoke (not steam) on a cold start that seems excessive. For those problems that you cannot resolve on your own, ensure that you contact a professional for help.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[120,600],'takeocean_com-banner-1','ezslot_15',104,'0','0'])};__ez_fad_position('div-gpt-ad-takeocean_com-banner-1-0');if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[120,600],'takeocean_com-banner-1','ezslot_16',104,'0','1'])};__ez_fad_position('div-gpt-ad-takeocean_com-banner-1-0_1');.banner-1-multi-104{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:600px;padding:0;text-align:center!important}. To do this, you have to start your 2-stroke engine and wait for it to warm up. This is 50 parts fuel to 1 part oil. Use a small wire brush to clean the plug and follow up with a gap check. We have listed all the 'normal' situations below: If you inherited a 2-stroke boat engine from 1990 or older, then it's normal for it to smoke. (You will find many spare parts on, A 2-stroke boat engine that smokes white = water in the engine, A 2-stroke boat engine that smokes blue = oil in the engine, A 2-stroke boat engine that smokes black = adjustment problem (overheating). What's the best 2 cycle oil to use? You should know that the causes of a white smoking outboard motor are the same regardless of its power: 6hp, 15hp, 25hp, 30hp, 50hp, 60hp, 75hp, 100hp, 150hp, 250hp, etc. By heating, the marine engine converts the water in this circuit into white smoke. Whats your thoughts on this. He will be able to carry out a more complete examination of the situation and resolve your white smoke problem. If not, change it by following our guide: '. Once it clears up it's fine and doesn't smoke much at all. If your boat engine smokes white because of the water vapour, you need:if(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[300,250],'captain_ocean_com-leader-3','ezslot_16',113,'0','0'])};__ez_fad_position('div-gpt-ad-captain_ocean_com-leader-3-0'); If your outboard motor smokes white from overcooling, you need: If despite your best efforts none of the above solutions work, stop the marine engine immediately and contact a mechanic. To cool, all boat engines use a water-fed cooling circuit. I just bought a two-stroke fuel-injected boat engine and it smokes white. If not, the engine requires an overhaul. Like any other machine, boats might have a few issues here and there that might require fixing. A single test can differentiate between the two problems. The reasons for a white smoking boat engine due to water vapor are multiple:if(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[300,250],'captain_ocean_com-large-mobile-banner-1','ezslot_12',112,'0','0'])};__ez_fad_position('div-gpt-ad-captain_ocean_com-large-mobile-banner-1-0'); If your problem is not due to water vapour, then your boat engine smokes white due to overcooling. 1. How to choose an antifouling paint for your boat? It doesnt matter if the engines yellow, green,silver-gray, or white. If the drops do not evaporate, touch the riser with your hand. From boating to fishing, from scuba diving to windsurfing, from water tubing to snow tubing. If the boat motor is idle most of the time, it will not get hot enough to burn off exhaust/carbon. If your four stroke smokes more than you think is normal, definitely get some expert advice. So when we see his 2-stroke boat engine smoking blue, white or black, many of us are not serene! How To Choose And Install a High-Performing Boat Battery Charger? The two stroke oil jug will have quick guides that suggest the volume of fuel and oil needed to make the proper mixture, but it is easy to get this wrong. When the motor gets to operating temperature the smoke levels should decrease. The Backback blower I have seems to be blowing alot of white smoke out and i can't seem to adjust the carb right to lessen it. (Ultimate Buyers Guide). There is nothing to worry about. I did a decarb with seafoam and she's running even smoother now, tons of gunk came out. Here is a quick synopsis to help diagnose your issue. It may seem daunting to deal with small motor problems, especially when you would rather be fishing, but with a bit of knowledge and the tips in this article, you can be back on the water with less smoke and a happy motor. Many factors contribute to this unsociable condition and it can be one or more of the following: 1. (Yes, But..). Oct 23, 2014 Asked this in my intro thread but thought maybe its more appropriate here; After raising my mercury 9.9 about 3 inches to make it even with the bottom of my boat I've noticed that my motor is smoking more; I attribute this to 1 verheating? The problem is certainly with the injection and only an expert can calibrate the injectors correctly.if(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[300,250],'captain_ocean_com-leader-3','ezslot_16',113,'0','0'])};__ez_fad_position('div-gpt-ad-captain_ocean_com-leader-3-0'); In summary, all boat owners should be aware of marine engine exhaust fumes. Even w/ cold air, cold oil, or a cold engine, the engineers at Cummins, Detroit, Caterpillar, Volvo, etc., have been able to modify/control this fuel delivery in such a way that these fly by wire diesels have not only increased power and efficiency, they have solved the cold start-up smoke problem to where they will become the engines of choice within the next decade. How do you fix a smoking 2-stroke boat engine? - Captain Ocean Noticed last time out that when coming down off of a plane that a lot of smoke came from the exhaust port on back of motor. Poor fuel quality (low cetane rating) In this case, the 2-stroke or 4-stroke boat engine will have trouble starting or worse, it won't start. If it is no longer tight, replace it. Instead, they utilize an oil sump that splash lubricates the engine parts as the cam shaft rapidly moves through the engine cycles.
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