Now that I have gotten use to the quirks of the PP SR, I am liking it more and more, EXCEPT... the oil cap keeps coming loose and getting pulled out when trimming under the pine trees I have to do in one yard. I have about an hr of trimming around pine trees, owner likes the grass cut under the trees, but does not want the branches that are just above the ground cut. Every time I do this yard.. somewhere along the way the branches knock the oil cap loose and it then gets yanked out. Friday I didn't catch it in time and ended up running over the cap... end of day for that mower. Anybody else having these issues with this mower? Short of duct tape to hold cap from turning.. does anybody have any idea's on how to keep the cap from coming loose?