why does my 18 hps' moter spark plug has black soot on it
Make: briggs straton
replaced valve piston cleaned carb.new coils
Hello and thanks for using this service,That happens when the engine is running too rich. Typically the air filter is plugged up and dirty. WHat can also cause this is the carburetor settings. If it is not adjusted correct and running too rich of a fuel/air mix...like when you have it on choke. Check the air filter first before anything.PLEASE READ BELOW BEFORE LEAVING...Thanks
Over 20yrs of experience in small engine repair.