Just found this site . A lot of good info here, My question is on my lawn mower there is oil coming from the fuel pump. After surfing around on here i think the head gasket is blown . I checked the hose that goes into the crank case and blew out oil so from what i have read that confirms a B H Gasket correct . Know how hard is it to change . I am not that good of a mechanic oil changes fuel pump replacement that kind of mechanic simple stuff. Will i have to readjust the vales ?