We have a Cub 1650 that's been in the family since brand new in 1975. I use it mainly for throwing/blowing snow with a QA36A in the winter here in Western NY. This spring I've been hauling soil and sand as I level our lawn. I change the oil at least once a year and usually just before winter as that's when the 16 HP Kohler gets it's heaviest workout throwing snow at 3600ish rpm. So just drained the oil. Have a David Kirk (sponsor) magnetic oil drain plug (Along with several other of his wonderful upgrades) and just found these engine pieces (ring pieces?) stuck to the magnetic plug along with the usual amount of sludge stuck to the plug. Hopefully the pics post and show the 2 pieces well. Any idea what they might be and is my 45 year old, never rebuilt engine on it's last legs? It still runs absolutely perfectly with no issues.