Craftsman Briggs Stratton Rotary Lawn Mower?
Mine is emitting a black sooty type substance, only just noticed it today. It’s mainly on the handles and along the sides of the mower…It is running fine – no issues apart from this…Does anyone have any ideas what could be causing this problem?
Replace Air filter, check oil level, and or change. Do nt tip mower towards Air filter side. This will soak air filter with oil, and it will not work propperly. Depends how old lawnmower is. Does it smoke all the time? The burning or combustion of fuel is not clean. carbon is emmited, but not to that extent!
For some reason you have a rich fuel mixture. It could be that the air filter is dirty and needs changing or it could be that the carburetor needs cleaning.