I have a Vintage Mercury KG4 flywheel that needs to be cleaned up on the outside but the taper and the key way are in good shape. This is a light racing flywheel and would be good for a KG7, Mk20 ignition conversion. A lot of racers this flywheel on 20H, MK28, MK25 power heads after they have the taper and key way machined to fit the larger crank. Happy Bidding. Check out my other auctions