<HTML>Pat,
I would stongly urge you to contact Michael Hope at Brineton Engineering in England.
[
www.brineton-eng.co.uk]
Michael made the ten Doble roller bearing crankshafts for me and they were simply perfect. Between the two of you, the weak Stanley crankshafts can be redesigned for much better strength. They do CNC machining, hardening and grinding. Michael can also do the connecting rods and redesign them for much better strength and larger bearing races. You would have to send him a connecting rod and a crankshaft for him to examine.
In fact, why don't all you 10 hp Stanley owners get together and have a run of crankshafts made and eliminate the breakage problem.
I cannot recommend Michael and Brineton Engineering too highly.
Jim</HTML>