Went to change the oil on the 4000 today and knew it wouldn't be a normal oil change. Had to use a 3/4" drive breaker bar with a 28" cheater and 1 5/16" 6 point socket to break the drain plug loose! Ok, I blew that off as someone showing their muscle or just trying to stop a drip. But then....after I bent my filter wrench trying to get the filter off, someone was just being too over zealous about tightening things. Had to break out the mega channel locks. Also saw they painted the oil return galley. Have to clean all that paint off. Here's the questions. Is that screen in the pan normal or should I pull the pan? My 861 had the circular screen on the plug. Couldn't find anything like this type in the shop manual or FO-20. Also, why would someone go thru the trouble of welding a bolt head on the drain plug? Looks like a normal old 172 pan plug and I could use the spare one off my 861 and get rid of the rounded off welded one.