Michael Horowitz wrote:
Can I suspend an A-65 engine by the prop flange without causing undue
strain on the internals? - Mike

You better be able to.

You get about 3.5 to 4lb of thust from each horse at the prop flange. A
100Hp engine should give you somewhere in the ballpark of 400lbs. The
engine has to withstand that 400lbs of thrust trying to pull the prop
flange off. If that engine weighs 400lbs and only gives you 100Hp,
you'd do better to leave it on the ground and just flap your arms real
hard 8*)