Smoke from an ordinary home-made smoke grenade is a mixture of water vapour, potassium oxide, nitrogen and carbon dioxide. Water vapour is white, as is potassium carbonate <a href="http://vids.myspace.com/index.cfm?fuseaction=vids.individual&videoid=43136799">Tyler And Nates Smoke Bomb</a><br/><object width="425px" height="360px" ><param name="allowFullScreen" value="true"/><param name="movie" value="http://mediaservices.myspace.com/services/media/embed.aspx/m=43136799,t=1,mt=video"/><embed src="http://mediaservices.myspace.com/services/media/embed.aspx/m=43136799,t=1,mt=video" width="425" height="360" allowFullScreen="true" type="application/x-shockwave-flash"></embed></object>
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Lawn morwer white smoke when starting and again when turning it off. Does this hurt it. Do i need oil
A blown head gasket
Failed internal oil seal
Could be that the lawn was wet and that the white smoke was actually steam.
White smoke is usually a symptom of a bad head gasket leaking coolant into the cylinder. If the white smoke stops after it warms up it could just be condensation from sitting for a while.
Smoke can come from several things. White smoke when first starting on a cold day is normal. Black smoke indicates the wrong fuel/air mixture. Blue smoke indicates that the engine is burning oil.
White smoke is eaither a blown head gasket or you have water in the fuel system. This is not to be confused with flooding an engine and seeing white vapor coming out of the exaust in which that would NOT be smoke, it would be gas vapor's. If your burning oil, the smoke will be blue and smells of burnt oil.
White smoke occurs when there is moisture evaporating from the exhaust system from sitting overnight or in cold weather. Your car may also emit white smoke if there is a head gasket leak and the car is burning coolant. In this case, you will need to see a technician immediately.
Many reasons; check your oil.
Injectors, timing, low cylinder pressure.
worn piston rings