Is it dangerous? Well breathing burning oil can't be good for you....besides that, why is the mower smoking? You have an engine problem, bad rings or whatever that requires immediate attention or you will destroy the engine. Get it looked after before you mow any more.
Most likely you have too much oil in the engine or the piston rings could be going bad. Check and make sure your oil level is correct. If its the rings you need to let a professional mechanic diagnose the proper repair.
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
Oil burning
white smoke comes out when you use wrong gAS, Like if itsays only UNLEADED and you put diesel,,then you will see white clouds.
my mower intermitling smokes a white smoke and fouls the plug over time. is the rings stuck?? will marvel mystery oil in the gas and oil eventually free up the rings??? thanks ,porbet @ aol.com
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.
to much oil in unit or it was tilted and oilleaked out of the case and the extra is being burned off
Probably to much oil in the crank case. Otherwise mixture control on carb. is off
hydrogen
Bad piston rings, oil level is too high, check the oil level and adjust
If it is a push mower there are only a couple things that will cause the mower to smoke. 1) The rings are worn and need replaced. This lets oil seep past the rings and burns the oil in the cylinder. This will cause a white smoke. (this is probably the most common cause for engines smoking) 2) The carburetor is putting too much gas in the engine. This will cause the engine to run rich and make a black smoke. 3) There is an external oil or gas leak that is leaking onto the motor and burning from the heat of the engine. If it is a riding mower there are many more things that could cause it to smoke.
I am assuming that the mower doesn't start.... My first guess would be that you are not getting spark to ignite the gas in the engine. Check to see if you have spark at the spark plug.
In most cases I've seen, the white smoke is caused by oil on the exhaust. And as far as the idle speed, a simple adjustment on the carburetor should fix that. Or bad rings , bad valve seals or crank case is over full and pushing oil into the carb. threw the breather tube. Hope this helps