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Hey Glen: Yes, there are many C-85's that end up with an O-200
crankshaft at overhaul. You are correct that the C-85 crankshafts are difficult
and expensive to find because they are no longer available new. However, the
O-200 crankshaft also requires the O-200 connecting rods and pistons. The
cylinders are the same, just the valves/springs are different. So if you have a
C-85 with an O-200 crankshaft, you end up with the same displacement as the
O-200 and, as I understand it, the horsepower is up over 90 but it is still a
C-85. I believe that you can obtain the O-200 crankshaft STC from more than one
place, but I do not know any more than that.
There is an O-200 STC available from Skyport. I
believe it requires the airplane be converted to a D model or later.
(Are you still planning to bring the motorcycle
down next week?)
Lynn
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