The engine that came with the log splitter worked for awhile then quit one day. Took the head off to find the intake valve stuck open. I lapped it and checked it with dye, put it back together and it ran 6-7 more times before it did the same thing. Then I noticed that the valve guide was shot, and the engine was so old the local small enging shop could not pull up the numbers on it.
I need to pull the Brigs 5hp I.C. on the rototiller apart as soon as I'm done with it for the year, it's popping out the exaust once warm like it has a burnt valve. Hopefully it's got some carbon stuck in it and I can lap the valves and be done.
I doubt it, but one can hope, right?