Texasmark1
Well-known Member
Bought a mower in 2005 with a BS engine.....don't know if that has anything to do with it or not as most engines have to do what I am about to say somehow. Recently it has been running rough and I've been chasing a ghost. I've been looking in the wrong places. In short there was nothing wrong with the engine per se. The problem was the rubber hose between the OHV valve cover and the fuel pump. The hose had deteriorated to the point where cracks were in it in several places which allowed ambient air to dilute the pressure pulses from the crankcase to the fuel pump to pump the fuel. New hose and engine runs fine. Most of my problems with gasoline engines the past few years have been with hose degradation, both rubber and on 2 stroker small engine, plastic. Might do you you to have a peek at yours.