Fore and aft crankshaft play is the engine's thrust bearing clearance and
play is normal. It may seem like 1/4 inch but actually is less.

Kent Felkins
Tulsa



"Doug" wrote in message
ups.com...
My Aviat Husky' Lycoming 0-360 with a Hartzell constant speed prop
always has 1/8"-1/4" play front to back coming from the crankshaft I
think. It always seem a little excessive, compared to others, but never
was a problem. Engine and prop is beyond TBO and still going strong....



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