I have a toro lawn tractor with 17 horsepower engine when I engage mover deck oil leaks from small breather hole on fuel pump
disconnected breather hose from fuel pump and still oil leak from hose ,is head gasket blown.
What doses it have for a engine and what style fuel pump pulse or mechanical. If pulse style check for over filled with oil or if mechanical you need s new fuel pump. There was a thread on this just a few days ago.