Many times it just means that the mower has been leaned over on it's side too far and oil has gotten into the breather. It will burn this off after a while. If it persists then you have an internal problem in the engine and are getting alot of blowby into the breather.
If its black smoke you are burning oil possibly due to oil getting in your exhaust by tilting the lawnmower on its side or your rings are allowing oil by.
your fuel mixture is too rich it may be time to change your spark plug and/or air filter. a bad spark plug will not burn all the fuel correctly and a clogged air filter will not provide enough air for a good air/fuel mixture. Actually it depends on what color smoke is coming from it. Black smoke is fuel, however, blue smoke is oil, broken ring and such
its burning oil :(
Bad piston rings, oil level is too high, check the oil level and adjust
The smoke from your muffler has a smell because what is coming out of the muffler is the products of the incomplete combustion of your fuel. Some of those products are gases and vapors that have color and some are dark but small particles - that is what you call smoke. But some of what comes out are various chemicals that your nose detects as odors.
blown head gasket much?
its probably burning oil, if the smoke is white. if the smoke is black, it means its running rich. if the smoke is white, you have serious internal engine problems
It depends if the smoke is blueish it is burning oil .I it is black it is usually over fueled.
white smoke comes out when you use wrong gAS, Like if itsays only UNLEADED and you put diesel,,then you will see white clouds.
no... for there to be white smoke there is water in your combustion chamber if there was too much oil it would be black smoke Black smoke is usually to much fuel and blueish white is oil. So yes it is possible that it is oil in the combustion chamber.
There are three types of smoke that will exhust from your gasoline engine: White smoke, actually is steam from condensation of water within the muffler and exhust system. Number two is Black smoke, this is from unburned fuel. The engine is running far richer that it needs to be. Number three is blue smoke. This is usually associated with oil comsumption.
You have described the classic symptoms of a blown head gasket or cracked cylinder head or both. In either case, there is a loss compression and "get up and go". Also, coolant leaks into the combustion chamber (also affects "get up and go" and the steam comes out of the muffler/tail pipe as "white" smoke.