Thanks Max,
I thought it should swap over without too many issues as long as the stator has the mounting points on the new motor. I don't think it is the valves leaking, it is just so heavy to get it spinning and I am just not strong enough these days to get it spinning fast enough to fire. It runs very well once you get it running. I will see how it works out.
MF,
This motor would need one very big impulse starter 10.5 hp requires big shoulders to get fired up