propeller feathering while ground run

[cessnadriver]

MSHAC.
No I didn't talk with the mechanic that overhauled the engine, due to argument between him and the owner of the airplane that I got the engine from. Don't know the kind of cylinders or rings. Oil had small bits of rtv and fine grit in the oil filter, and I'm using multi-grade oil. After counseling with other A&Ps I've decided to remove the engine and send it to a reputable engine shop and have it disassembled, inspected, and reassembled. Repairing anything that needs repaired. In the mean time I'm re-installing my old engine. It was running fine before removal, just leaked quite a bit of oil, mostly from the push rod tube, I think?
Thanks for your questions.
Regards, BILLS