agford4x4
Silver Member
I have a 12hp B&S engine that runs really well. I bought it used, and when i pulled the plug, there is caked on carbon, it hasnt been changed since new in 1992. Anyway, i put a new plug in and pulled it after a few hours of use and noiticed a film of oil on it, why i don't know. The engine was owned by a guy i know who is particular about maintenance. I also have another B&S engine that is essentially brand new and it has the same thing so i dont think its a problem. At any rate, there IS caked on carbon on the valves and on the cylinder that i can see through the spark plug hole. Do you recomend pulling the head and scrubbing that off? I don't think its something that is going to be removed otherwise. I have pulled hte head on other engines to do this so its not a big deal.