My fellow shop rat found an interesting piece by the side of the road this morning.
A Briggs, 25 horse, OHV, IC Platinum, Intek. 2001 model.(Just the motor.)
He mounted on a old 22 inch Craftsmen deck (Just too use as a stand), replace a breather line, hit the electric start and fired it right up.
Doesnt smoke.....runs smooth....clean as can be.
Go figure.