propeller feathering while ground run

[mshac]

BILLS:

When was the motor overhauled? Have you spoken with the mechanic or shop who performed the OH?

Are the cylinders nickel, chrome, or steel? What type of rings were installed?

What did you find when you drained the oil? Did you refill with mineral oil?

I've never seen an overhauled engine turn the oil black in .5 hrs.

And those compressions should all be in the 70's if everything is fresh.