I have read several accounts of oil leaking from the fuel pump, but many posts stop and the post originator never mentions what the issue was. I am experiencing that problem with my John Deere LA125 with 145 hours. I do not smell oil in the fuel, and have not yet tested the compression. Does anyone have any insights from past experience? Perhaps a similar model with similar engine (Briggs and Stratton 21 HP)? I guess the leading causes are either clogged breather, or rings going bad? I hope the latter is a long shot given the engine has only 145 hours on it.