Bruce Covey
Member
Been awhile... She just always runs. Plowed garden just fine 2 weeks ago, then suddenly had lack of power running bush-hog which progressed to unusable in about a 2 hour window. Rough low idle and
occasional back fires. Definitely heard and felt an exhaust leak at the manifold on front and rear cylinders. Pulled manifold today and found broken gaskets at front and rear. Valves seem to be opening and
closing by equal amounts, front 3 plugs nice and tan. Rear isn't great, but I know that cylinder has lower compression than the others and usually has a dirtier plug.
Question: I tried to block the manifold intake ports as best I could while blowing into the carb port. It seemed like I was moving air. The two inner exhaust ports share manifold housing with the intake ports.
Do these ever develop pin-hole leaks? Seems like I might be getting some exhaust gases into the intakes, thus the lack of power.
Thanks as always...
occasional back fires. Definitely heard and felt an exhaust leak at the manifold on front and rear cylinders. Pulled manifold today and found broken gaskets at front and rear. Valves seem to be opening and
closing by equal amounts, front 3 plugs nice and tan. Rear isn't great, but I know that cylinder has lower compression than the others and usually has a dirtier plug.
Question: I tried to block the manifold intake ports as best I could while blowing into the carb port. It seemed like I was moving air. The two inner exhaust ports share manifold housing with the intake ports.
Do these ever develop pin-hole leaks? Seems like I might be getting some exhaust gases into the intakes, thus the lack of power.
Thanks as always...