2 stroke too much smoke. #1 Feb 16, 2025 · I have a 2007 KTM 250 XC-W.

2 stroke too much smoke Set your desired fuel-to-oil ratio (e. How smokey is your Yamaha 2-stroke? - Moderated Discussion Areas Hop to: A weed wacker, technically labeled as a string trimmer, is a handheld lawn care device. I was just paranoid because of the excessive amount coming from the sled. Black smoke is sign of too rich air-fuel mixture. I bought and completely blown and decided to take on the rebuild. . #1 Feb 16, 2025 · I have a 2007 KTM 250 XC-W. [ 𝐅𝐢𝐧𝐚𝐥 𝐓𝐚𝐤𝐞 ] If you want a clean, convenient, and accurate way to mix small batches Regarding how much two stroke oil to use in vintage sleds, I often see talk regarding the engine running too "lean" with 40:1 or more. Oct 31, 2023 · Hey guys first post on here and need some assistance I’ll give some back ground about the bike. You should see smoke coming out the back. 2000 rm125 fresh weisco piston set and boysen power pro reeds installed by me with about 3-4 hrs on both. Even with the correct mix You may get rough running until all the fuel lines clear. Two-stroke Oct 29, 2021 · Do all 2 stroke dirt bikes smoke? Most 2 strokes will inherently smoke, especially at start-up because they have a mixture of gas and oil that is being burned. This is my first rebuild. Your oil mixture ratio probably isn't the culprit here, so much as the engine temp. I’m an average C rider in hare scrambles so I’m rarely WOT. -Drained gear case oil after sitting for a couple years and only about 200ml of fluid drained. Only enough to notice it a little bit. Aug 11, 2023 · 2-Stroke something’s leaking and too much white smoke Jump to Latest 1. A gallon is about $50, but it the cost is negligible compared to the 50 gallons of fuel it will mix with. These dumbasses here don’t have a clue on what they’re talking about. I rebuilt the bottom and top end, but it smokes excessively. Go to a real boat site for advice. But, with that in mind- I'm guessing what's happened is that when they cleaned the carb the didn't set the mixture or air screw correctly. Think that maybe I have another bad carb? Oct 31, 2006 · Re: Excessive smoke A good two stroke needs to smoke! All two-stroke engines I have had (from lawnmower to dirtbikes and outboards) all of them have been smokin' at engine start, especially when they have been standing a while. You do not want to just add petrol to dilute the mix because if you dilute the mix too much you will risk seizing the engine which is even worse. I usually just use whatever 2 strok oil is cheapest. Your scooter is a 2-stroke. This guide will teach you how to tell the difference and the correct jetting setup for 2 Stroke and 4 Stroke dirt bikes. Oct 29, 2021 · Why does my 2 stroke smoke so much? There are a few reasons a 2 stroke can smoke more than normal: The fuel mixture is too rich. I am at 4000ft elevation and I have a 32:1 ratio fuel mix. There's lots of little adjustments that need to be made after cleaning a carb. The first thing you would want to check with a two-stroke engine is that you have used the correct two-stroke oil at the right mix. If I left it sit for a few weeks it was really bad. If your engine is a 2-stroke, blowing too much black smoke from the exhaust, then you have added to much oil the oil/fuel mixture. Now, what is a rich fuel mixture then? Rich fuel mixture refers to a high proportion of fuel amount with respect to the air present in the air-fuel mixture. Too high? Smoke is more white rather than blue. This will make your 4 stroke harder to start when hot, and can cause black smoke, especially if the pilot jet is too big/rich. Pilot jet rich vs lean The pilot jet is the most important jet circuit for most riders because its controls roughly 0-¼ turn throttle position openings. I do have an old leaf blower that is ran on a strong 40-1 mix and it does smoke a little. With the bike smoking so bad I am fouling plugs. This also brings up a good question. Proper fuel-to-oil ratio is critical for 2-stroke engine performance and longevity. Always May 6, 2013 · Author Topic: Too much smoke? (Read 4709 times) 0 Members and 1 Guest are viewing this topic. Jun 19, 2009 · Re: I know is a 2 stroke and it should smoke Two stokes are self-draining and drain best in the running position; most of the unburned fuel and gas goes out with the exhaust and water at the propeller. Gray smoke can be the most dangerous because it can result in an engine seizure, which cannot be repaired. A STIHL chainsaw is smoking due to increased friction between the bar and chain, too much oil in the fuel mixture, water in the fuel system, or a plugged air filter. Oct 29, 2021 · Why is my 2 cycle engine smoking? There are a few reasons a 2 stroke can smoke more than normal: The fuel mixture is too rich. -32:1 fuel mixture. These two are mixed at a proportion as indicated by the manufacturer’s specifications. Mar 18, 2024 · A motorcycle can smoke blue/gray due to worn out piston rings that causes oil leakage into the combustion chamber. Set the idle mixture as lean as possible without sneezing or stalling. As far as freshwater storing goes I’d put it on some sort of Too Much Oil in the Fuel Mixture for a 2-Cycle Chainsaw 2-cycle chainsaws require a gas and oil fuel mixture. With e-tec oil it barely produced noticeable smoke once warmed up. ) As long as your bike is running right, I bet it's a warmup issue and not an engine problem. It’s the normal light blue smoke so it’s not burning coolant. Also, the smoke will be objectionable if the wrong kind of oil was used (ie crankcase 10W-30 oil instead of two-stroke formulation). The lean mixture seem to help. The only problem is that the exhaust smokes clouds the neighborhood. Steps to troubleshoot and fix: Check the fuel mixture in the tank. Up to 40% of the fuel pulled into the cylinder is dumped out the exhaust when operating at idle speeds in old tech 2 strokes. There’s no oil in the motor other than the gear oil, therefore there’s no oil to leak past the rings. I have a 2002 Maskito 2t scooter that I premix. Get your machine running smoothly again with these simple steps. Could this be a side effect of the solution? Or something is wrong? Nov 22, 2024 · Two-stroke engines rely on a precise mix of gasoline and oil. But is very rich and smokes too much. I did use oil while assembling everything, but that should have burned off after about 10-15 min's running and I have close to an hour on it now. Would a leaking water pump seal cause this? 1997 sportsman 400L 4x4 May 21, 2017 · Also, dead engine start = cold engine temps = more smoke. The engine likes to be running at high rpms and a warm temp. (Yamalube R is a little smoky sometimes, too. And too little air. Neglecting synthetic oils: Synthetic 2-cycle oils provide better lubrication, reduce carbon buildup, and perform better in extreme Most 2 stroke skis are built for high power output and don’t like being at idle. Mar 3, 2014 · Re: Low smoke outboard 2 stroke engine oil 25:1 is for racing full throttle as if you were stealling that boat/engine combo running for hours, 50:1 is your best fuel/oil mix with half the smoke. It's almost as if your engine is trying to tell you how it's feeling. This means that there is too much fuel in the mix, leading to incomplete combustion. Yamaha 250 OX66 Excessive Smoking - Moderated Discussion Areas Hop to: Aug 24, 2013 · Whats up fellas. Once you realize the smoke is coming from the wrong fuel mixture, remove the fuel and fill it with fresh fuel with the correct gas-to-oil mix. Here is a good example of bad cranckshaft seal! THis is the reason why bike smoked so much. Excessive Carbon Buildup: The primary issue is increased carbon deposits within the combustion chamber and exhaust system. could all the smoke mean im running to rich? i think it means im running it perfect, because absolutely all the oil/fuel is getting burned up, making perfect plumes of smoke out the rear. Two-strokes do put out a more noticeable amount of smoke due to their design, but across the range of two-stroke oils, some create much more smoke than others. head gasket going out, if you start the bike with no cap on the radiator and you get bubbles and smoke that pretty much confirms it. You price seems good though. A number of things can go wrong within the workings of a 2-stroke engine. Aug 8, 2009 · Just rebuilt the entire motor on my 98 RM250 and am curious just how much everyone else's 2 stroke smokes? I realize there are a lot of factors, namely premix ratios, but what is the norm? I'm running 32:1 and mine seems to smoke constantly. The added hydrocarbons in oil are larger than in gasoline and require more air to burn. I know that a 2 stroke can smoke. may need to make sure all of the oil system is in good shape ( some have check valves) and adjusted properly like the Yamaha service manual calls for Mar 18, 2002 · Never really thought of how to limit the smoke. I am running a 32:1 ration. But what happens if you put too much oil in it? For 2-stroke outboard motors, nothing significant will happen aside from how the engine will end up producing more smoke than usual while the excess oil gums up the plugs. And no you won't wear it out. Check the oil level and drain some oil if the oil level is above the max. A properly tuned 2 stroke doesn't smoke!Skip the cable setup & start watching YouTube TV today for free. However, with the proper maintenance and diagnostic ability, many of these issues can be prevented. This can happen if you fill it with too much engine oil. Its a If the outboard is a two-stroke, don’t worry too much here, this is actually a really good thing! This is what you want to see because it is letting you know that the engine is being lubricated and you don’t have to worry about any issues there! If we are talking about a four-stroke, then there are a couple of reasons. Apr 13, 2023 · What Happens If You Put Too Much Oil in a 2 Stroke Outboard? If you overfill the oil reservoir on a two-stroke outboard engine, it will cause the engine to smoke excessively. I do not remember the bike smoking this much (after rev) before I replaced it. Mar 13, 2025 · Conclusion In summary, while oil is essential for the proper functioning of a 2-stroke engine, too much of it can lead to a host of problems, including incomplete combustion, carbon buildup, fouled spark plugs, increased smoke emissions, and overheating. Aug 4, 2006 · I've been a 2-stroke guy all my life (I'm 22) and I know it's good to see an amount of blue smoke. Aside from this, there should be no other smoke coming from any other parts of your motorcycle. Bike has power. Check for Dirt Build-up: Examine the air filter for any excessive dirt or debris accumulation as this can allow too much air into the carburetor, leading to a lean condition. The air-fuel mixture that the engine receives has too much fuel. Sep 26, 2012 · Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. Some older two cycle engines (read 1960s-70s) specified 20:1 You may have another problem or you are much worse than 20:1 If you just randomly poured you may be closer to 10:1 or worse. I noticed that there was a black sludge coming out of the exhaust 3 days ago · Using a ratio with too little oil can cause overheating and premature wear. It looks like the carb needs a rebuild and adjustment. it smokes but i know that is normal but how do i know if its too much? it seems to me that it is smoking too much, but i dont know. However, too much oil can also cause some problems. Oil that is coating the crankcase, crank, cylinder walls, and the bottom of the pistons makes it's way to the bottom of the crank. You can't get it "too lean" on idle. I explain what to do if you see white, blue or black smoke. The optimal oil-to-fuel ratio is crucial for engine performance and longevity. Reply reply MatthewBushen-Online • Reply reply More repliesMore replies Asleep_Salamander367 • Sep 4, 2011 · Re: 91' Yam 70hp 2-stroke, too much exhaust smoke. It smokes a lot at idle, very little at speed. After that and changing the gas the bike started right up. If you put fuel into a 4-stroke mower that has oil and gas mixed into it, your lawn mower will be billowing bluish or white smoke. While collecting it, it was stored vertically and with empty fuel tank, possibly for a few weeks. Weed wackers use a rotating string to cut grass instead of blades. How can I cure this problem? and still maintain a 16-1 mix? I have been using Lawnboy oil and Sthil oil. I tend to have some paranoia about little things like this. my spark plug whent bad and i put a knew one in and now its smoking in 1st gear not giving it that much gas still like the popping sound theres a lot of smoke does that mean i Jun 18, 2009 · Got an 02 yz125, havent had it too long so i dont know much about the history of the bike. 2T engines exhaust smells different than a 4T due the combustion being less efficient, so it will smell like gasoline. This is why jetting is so critical. If you end up with too much oil in the mix, then the engine will burn off this excess oil and produce a cloud of blue smoke. The oil that doesn’t get fully burned comes out of the exhaust as smoke. If you are premixing the fuel and oil yourself, it’s easy to make a slight mistake with the ratio. 5K views 1 reply 2 participants last post by jaguar Aug 17, 2023 karthy Discussion starter Oct 30, 2012 · Yes, smoke is too much even after running for 30 minutes. Meanwhile, it can be different for 4-stroke outboard motors because of how too much oil can actually cause the engine to seize up. If smoke really is bothering you, consider running 100% synthetic TC-W3 oil. if you put too much oil, it is, sometimes people just dont measure well the mixture between oil and gasoline in a 2 stroke, but if its a 4 stroke you have blown a headgasket Mar 5, 2013 · I have a 1996 Sportsman 400 2 stroke that a previous owner converted to pre-mix. No cheap or Spray the inside of the carburetor with carburetor cleaner and use a soft bristle brush on the inside to clean out any oil residue. You can check . Aug 8, 2011 · Recently started having this issue as well It's a two stroke so I count on smoke but I'm noticing oil coming from the mid point connection on the exhaust And seeing the tail pipe looks oily too What became of yours? 1990 Trailboss 250 4x4 2 Stroke magic! We would like to show you a description here but the site won’t allow us. Shake well before pouring into your machine. lean signs and optimize performance effortlessly! Sep 30, 2020 · today i use a smokeless 2 stroke oil i get at tractor supply that is syntec based and see less smoke ,another is use up all the mix before you make a new batch, always start with a bone dry gas can Oct 22, 2014 · A thick cloud of blue smoke is an indication of an oil rich mix, or incomplete combustion of the fuel/oil mix, which happens at lower rpms. I mean, its not a plume or anything, but its noticeable Apr 27, 2023 · If a lawn mower emits blue or white smoke, there is probably too much oil in the tank and has spilled over. Jul 18, 2017 · Pilot jet was clogged and float was on wrong. Using car motor oil: Only use oils formulated for 2-cycle engines. Jun 19, 2025 · To reduce smoke output in your two-stroke dirt bike, consider adjusting the fuel mixture by leaning it out for ideal combustion efficiency. 2 days ago · If the 2-stroke mix is too rich, it means that there is too much oil in relation to the amount of gasoline. On colder months the exhaust will be much more noticeable because of the cold temperatures. However, like any mechanical piece of equipment, there might be problems … Mercury 40 HP 2 Stroke Problems 2 cycle engine trouble shooting guide2 cycle engine trouble shooting guide 2-strokes and smoke - Moderated Discussion AreasHop to: Jul 31, 2008 · i got lots of blue smoke, but no absolutely no splodge coming out the pipe/silencer. My 2000 cr250 seems to smoke more than it should. The majority of the time coolant in the transmission oil means a bad water pump seal. Transmission oil seems to be leaking because it is getting lower and is not coming out of the bike anywhere. But once out on the water you don't notice it much. It won't seriously damage the machine, though. Feb 28, 2024 · Is Your 2-Stroke Over-Oiled? Watch This! 👉 2-Stroke Oil Check 👉 Learn how to identify if your 2-stroke engine has too much oil by looking for smoke, leaks, and performance issues. Aug 15, 2022 · Bought an 02 RM 250. Smoke often affects gas lawn mowers, but it can also happen to electric models. If there’s too much oil in the mixture, it can lead to excessive smoke as the oil burns in the engine. This Spring I took it out to the lake and fired the motor up and it was 2 stroke smoking like I had never seen before. Aug 2, 2011 · i just got a 2001 cr250r this is my first two stroke bike, it has a full pro circuit exhaust race piston and v force 3 reed. Using 32:1 Pro Honda HP2. Feb 5, 2006 · Hey guys, Was able to take my blaster out on the 1st real ride since i got it last monthand was wondering about the smoke from the exaust, I know its suppose to, but the more i rode it the thicker the smoke was getting. The motor stayed running for a min or so then it quit. Nov 2, 2012 · Post ReplyForum -> Not-So-Modern Jul 31, 2007 · I have a '98 YZ250. If you are smoking out the woods, look at your jetting, and insure that a clutch side oil deal is not leaking a little. You will notice extra smoke and it may have poor throttle response. … It’s a 2 stroke. It smells like premix so I think it’s either too rich or wrong premix ratio. I've got a boat with a 135 Force outboard which seems to run pretty well but is pretty smoky. Jun 26, 2024 · Hello ALL New to the site and posting. If the oil mix is too heavy then it will cause the engine to smoke. Sep 15, 2010 · Re: Mercury 2 stroke 90HP Smoking badly The smoke could be that your motor is injecting too much oil. So what do you do to fix this situation? It’s pretty simple; you just take out any excess oil and let your generator idle until the white smoke Feb 14, 2020 · Can you add too much 2 stroke oil? It’s important to get your fuel-to-oil ratios right when mixing two-stroke fuel. It can also cause by incorrect fuel mixture or if oil gets mixed with the fuel. But what makes me know it's too lean? I saw a thread here on TT saying that too Feb 20, 2025 · Mixing too much oil in a 2-stroke outboard motor’s fuel can lead to several problems. i apologize for the newbie questions, bu Dec 16, 2017 · In modern two-stroke-power-cycle engines the oil used is generally much improved over the older TCW3 oils. This is Too much smoke? Hey guys do you think this is too much smoke for a 2 stroke? The bike is a Dx100 which shares an engine with a yb100. My popo smokes a LOT. This causes white smoke when the engine burns the mixture. 2. Jetting is 170 main, 5 Apr 10, 2008 · Kris is right. This makes them put out quite a bit of smoke especially when the engine is cold and foul plugs like crazy. Aug 15, 2016 · Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. Drain the tank and add the correct ratio of oil and fuel to burn. Yes 2 stroke supposed to be smoking, but everything got it's limi Low-Quality Air-fuel Mixture A typical and straightforward cause that may make a leaf blower smoke is improperly blended fuel. The same is true if the smoke gets excessive to the point where you’re coughing and your sledding buddies are as well. Check if there’s too much Engine Oil, or Incorrect Fuel Mixture: White smoke can emit from your mower if you have too much oil in the crankcase reservoir. So, incomplete combustion is the primary cause of smoke in such an engine. May 15, 2005 · I got white smoke comming out of just one side, I checked compression and there both the same, Its a new top end and I know you have to wait for the rings to seat, but how long? What are some other things it could be? May 27, 2020 · White smoke from the tailpipe looks serious, but usually, it’s a simple problem, easily fixed. How do I get it to stop? Is my 2 stroke kawasaki smoking too much? Context: my 2021 kx100 had a fouled plug, so I replaced it. This type of machine is used to trim weeds and areas of the yard that can’t be reached with a lawnmower. Oct 9, 2014 · I read some threads saying white smoke is a possible sign of a head gasket leaking coolant into the cylinder which can be really really bad, but I know a general amount of smoke is normal for a 2-stroke, so I'm simply wondering - is this normal, or is something wrong? It's not significantly less smoky after the engine's warmed up a bit. Was wondering where i should start in the engine in looking for the leak. I am running Mobil 2 Cycle synthetic oil so it shouldn't hardly smoke at all after start up. But didn't cure the probl Too much oil makes you run rich. If you’re sitting on your snowmobile ready to go or you’ve just taken a break and the sled produces so much smoke that you’ve lost visibility, that’s too much. Automotive oils lack the proper additives for air-cooled engines. im guessing i should just rejet to a more lean mixture just wondering if anyone knows the jetting for my bike 2001 ktm 250mxc. How do you fix a two cycle engine that ran straight gas? Knowing how to read exhaust smoke can tell much about your ATV engine's health. Is there a certain brand that would reduce smoke? And fuel/engine additives? Thanks. Jun 4, 2023 · The world of outboard engines is vast and filled with numerous brands and models, but one that notably stands out is the Mercury 40 HP 2-stroke engine. Sep 7, 2007 · ALmost like I have about 2-3 times as much oil in the gas. Merc in-lines / “tower of power” are great motors BTW. 1990 ktm 300mx smokes when hot or cold. White sweet smelling smoke and higher temps also suggest it's burning coolant ie. Hope that helps Dec 11, 2006 · still to new to snowmobiles to know for sure but how much smoke should be comin out 97 skidoo summit 670 has not been run in 4-5 yrs but starts good and idels around 2000 maybe alittle under sounds good doesnt overheat just 2 stroke smoke Jul 26, 2025 · When evaluating the performance of your 2-stroke dirt bike, an essential aspect to inspect is the examination of the air filter to guarantee peak engine function. My 2-stroke lawn equipment does not smoke much at all and they are mixed at 40-50 to 1. To calculate the required oil volume, you must divide the total volume of gasoline by the first number of the ratio. How much smoke is 'too much' smoke for 2 stroke 4hp auxiliary? Howdy folks! I recently bought a 1990's vintage Suzuki DT4 outboard that the seller says 'runs well, but smokes A LOT', possibly from being stored on it's side at some point. Jun 14, 2025 · Master chainsaw tuning with our guide on 2-stroke engine symptoms. Jun 14, 2023 · Seeing your weed eater smoking can be alarming! But there’s usually a simple explanation (+ fix). Apr 29, 2016 · Hey guys Newbie to 2 stroke scooters. Top 4 reasons for white smoke from an air-cooled ATV include: Too much oil Wrong oil type Contaminated gas Condensation By the end of this post, you’ll understand the root causes of white smoke from an air-cooled ATV and what you can do to fix them. I'm not diagnosing his problem since there is no way to know the situation without being there, but it ain't right to say that there is too much oil in the gas because the two-smoke is smoking. Enter the amount of fuel you need to mix (in liters or gallons). However, excessive smoke after warm up can be an indicator of a couple problems. Too little oil can cause engine damage, while too much can cause fouled spark plugs and excess smoke. Sounds normal and since it’s premix the guy could be running a higher oil ratio. When I look at pre-2004 Supercross races, I don't seem to see any smoke at all when the bikes are on the line. I recommend using E-Tec two stroke oil for significantly reduced smoke. It runs great with lots of power, it's just a stink bomb. They can answer questions for any Yamaha outboard model or horsepower. Then save $23/month for 2 mos. 2 stroke running rich and how to tell - 2 stroke smoking blue how to tell if your 2 stroke running rich and how to tell by those 3 signs, thank you for sti Running rich – what does it mean Running rich simply refers to the motorcycle engine running on a rich fuel mixture. This can cause a range of problems, including decreased engine performance, increased emissions, and reduced fuel efficiency. Its blue smoke, not white so I Mar 31, 2007 · Spring is right there and temperature is changing a lot. Since the engine is burning pre-mix oil we have to be careful here, because blueish-white smoke is a normal occurrence of two-stroke engine operation. Using a better grade of oil will reduce smoke and also reduce carbon deposits. Sep 3, 2006 · Is there drool "spooge" running down your silencer at the end of a ride? Does your bike smoke at operating temperature? Do you foul plugs on a regular basis? Is your throttle-response poor and boggy? If you answered "yes" to any, or all of these, your problem likely lies in your carburetor jettin Jul 21, 2021 · If your dirt bike feels like it’s running at a sub optimal level there’s a good chance that you might be running too rich or too lean. [ 𝐖𝐡𝐲 𝐢𝐭 𝐦𝐚𝐭𝐭𝐞𝐫𝐬 ] Too little oil = poor lubrication engine damage Too much oil = excess smoke, carbon buildup dirty spark plugs, poor performance . Oct 2, 2007 · how much smoke should a perfectly running 2stroke put out with castor? All two strokes smoke some when first started, but that should subside a lot when warmed and being ridden. , 50:1 means 50 parts fuel to 1 part oil). Sep 21, 2023 · Excessive smoke – Too rich If your engine is producing excessive smoke, it is a sign that the mixture is too rich. Are the 2-stroke oils we use today "smokeless" or is that just a term put on the bottles to calm the enviros?? Aug 11, 2025 · Lower fuel economy Floods more easily Harder to start when hot As you can see, there's a lot of potential problems if you run your 2 stroke dirt bike too rich. Too little oil. Jun 20, 2011 · Your 2 stroke scooter burns a mixture of gas and oil , that is how it operates and it will have smoke in the exhaust from the oil combusting . Aug 20, 2025 · What Causes a 2 Stroke Engine To Smoke Why an engine emits smoke? A 2-stroke engine smokes because it has oil mixed into the fuel. When my bike smoke (blue) even when hot and have spooge coming out everywhere, I know it's time to lean the mixture. Jul 3, 2017 · All two strokes smoke. You don't want to lean it out too much because then you can sacrifice your engine just to lessen the smoke a little. The smoke color gives you an idea of the cause and how to resolve it. The exhaust may also emit excessive smoke and have a sour smell. I put the boat and motor away for the winter and everything was working great. Blueish-white smoke in a four-stroke ATV indicates engine oil has somehow entered the combustion chamber. When i noticed it was too much smoke i found out i had a leak in the front exhaust pipe where it goes into the engine. On the other hand, too much smoke from a 4-stroke machine means that the fuel supply is higher than can be burned inside its combustion chamber. I know two stroke is suppose to smoke a little bit but mines smokes too much. If you have a 2 stroke outboard boat engine and wonder why it smokes, I explain it all in under 6 minutes! I also go over what it means, and why newer motors Boat motors, especially two-strokes, commonly smoke because of an improper fuel to oil ratio or when the motor runs rich on fuel. I measure leanness/richness by looking at the plug, but wondering how much smoke is too much. The oil/fuel mixture is too heavy on oil. The smoke should also be faint white. Too much oil can smoke excessively, while too little can damage the engine. I had a 69 merc 1000 in-line 6. Adding gas into a weed eater isn’t the same as filling up your car. ProX put together a list of 12 key things to keep your 2-stroke running strong. Related Question Why is my motorcycle idling high? Sep 8, 2013 · It's pretty common for all 2-stroke sleds to smoke a lot on startup, especially after sitting for a long time. But running more two stroke oil, then your carbs is set up for, If yours is a newer two-stroke outboard engine, then it should burn fuel 75 percent cleaner compared to a standard two-stroke. I've done the obvious, new head gaskets, new crank seals, lean jetting, mixed 50 to 1 maxima 927, new air filter, float height looks good. They usually have a two-stroke gas-powered engine. 1/4 throttle CAN be a bi As he said, blue means too much oil in the mix, and the oil coming out your exhaust proves that. Apr 12, 2025 · A 2-stroke mower can produce white/blue smoke if there is too much oil mixed into the fuel. Later in the race, no smoke? It's starting to make sense. The power valve (if you have one) is dirty. I'm curious of opinions. Oct 24, 2011 · Re: No smoke from 2 stroke outboard Thanks all, that is good to hear. The Polaris service guys told me to run 32:1 so that's what I've been doing. . I guess the question is did it smoke too much for you? Mine use to smoke. Black smoke means the fuel mixture is too rich or the air filter is clogged. Running too rich or lean for an extended period of time can cause major engine damage. Make sure your air filter is really clean. I went riding yesterday and my dad noticed my bike was making alot more smoke than my friends yz 125. The tranny and crankcase are completely seperate. Nov 14, 2025 · What To Do If You Have Too Much Oil in Your Generator Having too much oil in your generator doesn’t only give you white smoke. Blue smoke isn’t necessarily bad in a two-stroke, but it could be the fuel ratio is incorrect if more smoke than usual is coming out. Of course, my Mikuni needs some attention. If there is way too much oil you will foul a spark plug and he bike won't run anymore. Its jetted to fmfs jetting guide, which called for a 260 main. Just don't mix to much, to much oil is not good either. It has an open air filter and a bigger main jet in the carb, other then that it's stock. -Starts first kick -Doesn't drink radiator fluid. After riding arou Jun 14, 2021 · Effective solutions to fix white smoke issues in your snowblower. The 2strokes useally smoke alot if the mixture is too lean, ( too much oil and not enough fuel. Dispose of the fuel properly following local Jul 2, 2023 · Also, avoid operating your mower at a higher than 15-degree angle on any steep slope. Known for their reliability and performance, these engines have become a popular choice for boating enthusiasts worldwide. Over-filling the tranny of a two-stroke can't make the bike smoke, unless there is a mechanical issue that is allowing oil to enter the crankcase from the tranny, such as a leaking clutch-side crank seal. Dec 28, 2022 · Most 2-stroke motors require a premixed blend of fuel and oil. There is some residue that goes back through the recirculation check valves and some drains back to the air silencer from the crankcase. However, a correctly jetted two-stroke engine should not smoke much when it has reached operating temperature. Nov 10, 2022 · When the fuel screw on a 4 stroke is opened up too much, it will allow too much fuel through. I unhooked the oil injection (didn't use the block off plate) and premixed, and it still smokes way too much. Ideally, you want a good proportion Nov 28, 2023 · Two-stroke engines blowing smoke. When this happens, excessive blue-tinged smoke will come out the exhaust port, indicating too much oil is burning directly in the combustion chamber. Apr 17, 2010 · Hey all. Too much oil, and your engine may struggle to start or run, generate carbon buildup on engine internals, blow clouds of smoke and perform poorly in general. Thanks for Aug 21, 2003 · How much White smoke coming out the exhaust for a 2 Stroke is normal? 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. Discover rich vs. I changed the spark plugs, charged the battery; it starts/runs fine, (it's fast!) but it smokes big time. When the fuel mixture is too rich, it can lead to incomplete combustion, causing smoke. If it is too much smoke, any help keeping the smoke down would be appreciated! This video cannot be played. If you suspect the ratio is off, drain the tank completely. It is quite embarrasing for us to cut the lawn. To address this issue, you will need to adjust the carburetor needle to allow for a leaner mixture. My understanding is these get worse over time so the smoke you see today may be just the beginning. If you pre-mixed the fuel and oil yourself, it’s easy to end up with too much oil in the mix, which the motor will burn off and thus produce a cloud of blue smoke. I have tried different jetting settings and also purchased a thicker Suzuki needle in hopes that it was simply runni Jul 18, 2003 · It seems to smoke more when you run it at low rpm's with alot of throttle. while we're on the subject, does anyone know how much oil is too much? what will a 2 stroke outboard successfully burn without problems? Spark plugs come cheap, powerheads do not! Mar 24, 2022 · The reason a two-stroke engine smokes is because the lubricating oil is mixed with the fuel/air and burnt in the combustion chamber, producing a lot of smoke. Gas-powered leaf blowers utilize a pre-blended fuel that brings gas to the two-stroke motor oil. That doesn’t mean you won’t see smoke at all, just at a much more reduced rate. 4-Stroke Engines: For 4-stroke engines, white smoke usually indicates an oil leak into the combustion chamber. Conversely, too little lubrication can cause gray smoke to come from your engine, and this usually means that your weed eater is overheating. Both two-stroke and four-stroke marine engines, including outboard, inboard, and sterndrive engines, can experience excessive smoke due to worn piston rings. g. Jul 31, 2025 · White smoke in a 2-stroke bike often means the fuel has too much oil. As the engine runs, the extra oil will get burned off with the gas. I am wondering if this is excessive smoke or if this looks normal. I would make sure your motor is still in good shape (compression) if there was a chance that it did not receive proper oil because of water in tank. Using too much oil significantly deviates from this ideal, resulting in negative consequences. I'll drop to idle, and then depending on the wind, i'll choke myself out with all the smoke and have to turn into the wind so it blows away from me. My smoker smokes like c Why does your chainsaw keep smoking? Depending on where the smoke is coming from will tell you a lot about why it is smoking. It might also choke the engine and may cause permanent engine damage. Sep 23, 2019 · In the first place, you shouldn't be tuning for smoke. Worn or damaged piston rings can allow engine oil to seep into the combustion chamber, where it burns and produces smoke. Filled up last night. What valves are you speaking of ? so out of the 4 months ive riden i know when my bike isnt warmed up good it will smoke if you give it gase even on idle . I have a 1991 150 Johnson Fast Strike. Won't let me upload vi Nov 27, 2023 · A clogged exhaust in a 2-stroke engine can cause symptoms like loss of power and running rough. I rode it for 30 km yesterday and when I got home and put it in neutral it kept producing visible amounts of smoke when I was revving it. bike smoked a good bit and had low compression so I did a rebuild all went smooth very little s May 1, 2007 · Please tell me, do 2 strokes normally smoke? (white smoke) It's a '97 Waverunner 760. At 50:1 ratio. These substances are combined in a specific ratio, commonly 50:1 (50 parts fuel to 1 part oil). This is my first 2 stroke so I am very unfamiliar with some things. I run an entire quart in my 250 tranny, always have. Reasons for excess smoke Poor engine oil However most saws should run with 20:1 just with much smoke. Sep 7, 2012 · Two-strokes on YouTube maintained by amateur mechanics smoke quite a bit. Using more oil than this can cause the engine to begin smoking. Anybody have these issues. it is blowing a substantial amount of blue smoke at all ranges of throttle. Jun 23, 2014 · Hi: My 1971 Lawnboy requires a 16-1 mix. Conversely, using too much oil can lead to poor performance, excessive smoke, and spark plug fouling. Also, the idle screw is probably too low. It used to produce much smoke when the engine was cold but stop doing it after 1 minute of riding (and rarely producing visible "clouds" of smoke), but now it produces smoke even when hot. mfluhe ikhvnf iwfyzae fjyfku aen xxis ilzod tpsweug kasq riim bngurc vht ykrw rzto ulqa