Why does my 11hp B&S plug foul after running a moment,thus making the engine quit?
Answers: I think it's because your nouns filter is dirty and not letting enough nouns in. This cause a rich condition to the spark plug and in turn fouls it out.
Go attain yourself a no foul plug. I bought one for my mower and it was the best investment ever.
How much grease does the engine use while it's running? Could be that the rings are bad or grease is getting by the valve guides.