A buddy at work recently picked up a nice Power King tractor of the '78 vintage. He tells me it's an 18hp Kohler which I believe may be a K361? Not too sure or familiar with the older cast Kohlers. Anyway, even though this machine was well maintained, he was talking to another fella who sold these models, and was informed about how these engines would lose the valve guides and push the valves up through the head.
He is a bit worried about the possibility of this happening, but I gave him some PM measures to go through including starting the use of Marvel Mystery oil in his fuel. Can anyone give me some details or info about this problem?