H hesitation to shut down

Just to add a note to what Cap has already mentioned, be sure that idle is properly set down low where it belongs.

If the throttle plate is set too far open at idle, even tho you have pushed your hand throttle back, it could still be getting too much fuel adding to that dieseling problem.

Hope this helps some,

Allan

I don"t remember the specifics, but doesn"t that do something to the backpressure in the exhaust manifold, which in turn affects the way the tractor runs? Don"t you stand a much greater chance of burning the valves with a straight pipe because the combustion temperatures are hotter?

It isn't that the combustion temps are higher, it is that the straight pipe gives the cooler outside air more of a straight shot into that combustion area where an exhaust valve may be hanging open.

Red hot valve with no support hit by a blast of cold air under certain conditions equals a warped valve. Rare, but it could happen.

Is this the part you meant?

Allan