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Thanks for the suggestions! This is my first time taking this (any) engine apart. I'll figure out how to get the piston out and check the rings.

Wouldn’t the positive compression test suggest the the rings, piston and head gasket are good?

The outside ring was banged up in a similar fashion, center was fine. Cylinder walls have no damage.

My fuel pump is leaking oil. Motor is a 17.5 Briggs and Stratton (31F707 0112 E1) on a 17 year old JD L100 Motor sounds and runs great. I just replaced the head gasket last night as I thought that was the problem. Checked the oil level, tube from dipstick to fuel pump, hose from crankcase to...