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Car Forum / Driving, Maintenance, Tuning / Maintenance and Repair / May 2006mower white smoke
I just started the mower and it runs on and off with a lot of smoke. I did drain off the mower engine oil last winter and refilled that with 5w30 after checking up with this newsgroup. My guess is that I put in some gas that has been around over 6 months. What other option do I have? The mower has been in use only for 3 years. Daniel Toronto > I just started the mower and it runs on and off with a lot of smoke. > I did drain off the mower engine oil last winter and refilled that with > 5w30 after checking up with this newsgroup. > My guess is that I put in some gas that has been around over 6 months. > What other option do I have? > The mower has been in use only for 3 years. You sure it isn't from the oil-soaked air filter? My Honda engine'd lawnmower does that. No crankcase oil burned as the level never changes, but when I take off the air cleaner it stops belching smoke. B~ The dtong22@yahoo.com entity posted thusly: >I just started the mower and it runs on and off with a lot of smoke. >I did drain off the mower engine oil last winter and refilled that with >5w30 after checking up with this newsgroup. >My guess is that I put in some gas that has been around over 6 months. >What other option do I have? >The mower has been in use only for 3 years. Did you put in some gas-oil mixture by mistake? Perhaps a jerry can meant for your snowmobile, chain saw, or outboard? > I just started the mower and it runs on and off with a lot of smoke. Are you saying the mower will only run periodically and when it does it is with a lot of smoke. Or are you saying that sometimes when the mower runs it smokes, but not always. > I did drain off the mower engine oil last winter and refilled that with > 5w30 after checking up with this newsgroup. Did you overfill it. Also has the mower been tipped on it's side with the carburetor on the down side. > My guess is that I put in some gas that has been around over 6 months. Does the gas have two cycle oil in it. > What other option do I have? Check the above. > The mower has been in use only for 3 years. > > Daniel > Toronto I did put in pure gas no mixture. I am to check the air filter and spark plug later this evening. I will also get some fresh gas to see if stale gas was the problem (idle for 6 months) The mower runs steadily but with a lot of white smoke on and off. I will double check if I put in too much oil - which I doubt as I did check the dip stick. Thanks a lot from your guys advice. Daniel > > I just started the mower and it runs on and off with a lot of smoke. > [quoted text clipped - 22 lines] > > Daniel > > Toronto white smoke, if it is truly white, is caused by *water* - so say the experts. as long as the engine runs normally, I'd use it, chances are the source for the water will be eliminated through use. >mho >ve >D r i v e / E a t L e s s - $ a v e M o n e y The fiveiron@webtv.net entity posted thusly: >white smoke, if it is truly white, is caused by *water* - so say the >experts. Don't think so. Water causes water vapour. It looks entirely different than smoke, though I guess there's an outside chance that someone could mistake it for smoke. White smoke, or at least 'quite white' has poured out of my rear-tine cultivator when a friend filled the tank from a jerry can meant for my chain saw. > The fiveiron@webtv.net entity posted thusly: > [quoted text clipped - 8 lines] > cultivator when a friend filled the tank from a jerry can meant for my > chain saw. When diagnosing automobile exhaust smoke, technicians usually refer to the vapor from water condensation as white smoke. Oil burning produces a blue gray smoke that might be mistakenly called white smoke until you see the difference. Black smoke is due to excessively rich fuel mixture. Lawn mowers and other air cooled engines cannot produce the so called white smoke caused by water vapor because there is no coolant to leak into the combustion chamber and the muffler is too hot to allow water vapor condensation. Any "white" or blue gray smoke from the exhaust on an air cooled engine is from burning oil.  SignatureKevin Mouton Automotive Technology Instructor "If women don't find you handsome, they should at least find you handy" Red Green The Kevin entity posted thusly: >> The fiveiron@webtv.net entity posted thusly: > Black smoke is due to excessively rich fuel mixture. Lawn >mowers and other air cooled engines cannot produce the so called white smoke >caused by water vapor because there is no coolant to leak into the >combustion chamber and the muffler is too hot to allow water vapor >condensation. All correct. > Any "white" or blue gray smoke from the exhaust on an air >cooled engine is from burning oil. It was most definitely white, or at least whiter than what I would call blue grey, or even light blue grey, that was coming out of my cultivator. The cause was 30:1 gas-oil mixture in the tank. Hi guys. I got it fixed with a package from Sears with a new spark plug, oil , gas purifier+ air filter. Both the air filter and plug were found to be greasy. Likely I was tipping the mower last fall the wrong side resulting in oil stuck in the plug and the filter. My fault: I should have taken those apart before posting. Now I am spoilt with posting questions before doing the most obvious. Anyway I have changed everything and it started with just one pull with no smoke at all. Thanks for all your guys' info and valuable inputs\. Daniel Toronto dtong22@yahoo.com wrote in article <1147467222.693774.172280@g10g2000cwb.googlegroups.com>... > Hi guys. > [quoted text clipped - 10 lines] > Daniel > Toronto Gas purifier?????? >Gas purifier?????? sorry stabilizer some kind of gas additive it is a package of oil, filter, plug + gas stabilizer at can$17 - a ripof daniel >When diagnosing automobile exhaust smoke, technicians usually refer to the >vapor from water condensation as white smoke. Oil burning produces a blue [quoted text clipped - 5 lines] >condensation. Any "white" or blue gray smoke from the exhaust on an air >cooled engine is from burning oil. Kevin, Most convincing argument and right on. Thanks. Daniel Yet another technically-barren post from fiveiron..... .....the Internet poster who is unencumbered by the thought process >>> fiveiron@webtv.net wrote in article <7693-44621681-10@storefull-3316.bay.webtv.net>... >>> white smoke, if it is truly white, is caused by *water* - so say the experts. .....water leaking into the cylinder from the cooling system. If there was enough water in the fuel to create steam (white smoke), the engine would not run on that fuel... >>> as long as the engine runs normally, I'd use it, chances are the source for the water will be eliminated through use. The "source" for water-caused white smoke was eliminated when the engineers decided to go with an air-cooled engine for lawn mowers. > The "source" for water-caused white smoke was eliminated when the > engineers decided to go with an air-cooled engine for lawn mowers. Maybe the mower's mini-computer is leaking water into the combustion chamber. ShazWozza <shaz_wozza@elementspring.com> wrote in article <newscache$mqu3zi$7or1$1@elise.onthenet.com.au>... > > > The "source" for water-caused white smoke was eliminated when the > > engineers decided to go with an air-cooled engine for lawn mowers. > > Maybe the mower's mini-computer is leaking water into the combustion > chamber. Or, maybe the hole in his head is allowing water to leak into fiveiron's brain....... > white smoke, if it is truly white, is caused by *water* - so say the > experts. I'm sure that "expert" opinion comes as a big shock to the people who fly old airplanes with radial engines- which emit MASSIVE clouds of very white smoke on startup. Especially since they are AIR COOLED engines! Examples: http://www.silverstatenews.com/newssections/Sports/sportssections/airracing/rare bear061803/images/Image029.jpg http://www.airrace.de/video/CriticalMassStart.wmv Sounds like you need better experts. Yes, in water-cooled engines a sudden cloud of white out the exhaust can certainly be due to water from a blown head gasket. White smoke can also be a result of heavy oil contamination, and that's always what causes it on air-cooled engine. It happens in those aircraft radials because about 1/3 of the cylinders are "upside down" and tend to fill with oil leaking past the rings after the engine is shut down. It happens in lawnmowers because they've either been over-filled or tipped so that the crankcase breather spits a big slug of oil into the carburetor. >I just started the mower and it runs on and off with a lot of smoke. >I did drain off the mower engine oil last winter and refilled that with >5w30 after checking up with this newsgroup. >My guess is that I put in some gas that has been around over 6 months. >What other option do I have? >The mower has been in use only for 3 years. White smoke? White? On an air-cooled engine? Did you drain the gas also? This sounds like it could be bad gas more than anything else. --scott Signature"C'est un Nagra. C'est suisse, et tres, tres precis." >>I just started the mower and it runs on and off with a lot of smoke. >>I did drain off the mower engine oil last winter and refilled that with [quoted text clipped - 4 lines] > > White smoke? White? On an air-cooled engine? Oil. Been there, done that. THICK white smoke that practically looks liquid. Mosquitoes hated it. :-) Assuming its not over filled with oil (check that first) I'll bet you tipped the mower on its side to change the oil. I'll bet the oil breather filled with oil, and the breather is connected to the air inlet for emissions control. Fire it up, let it run for a while, and I'll bet the smoke clears up in a few minutes.. |
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