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Prop shaft run out

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Peter Reilly

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What is typically allowed for

What is typically allowed for run out? I hit some rocks that destroyed the prop and am indicating .009" - .010" run out at the very ned of the prop shaft.

Thanks
 
"Peter,
I don't have a s


"Peter,
I don't have a spec in my Chrysler book for shaft TIR. I did find some interesting info in another marine manual.
A new shaft on v-blocks should be .0008" TIR (that is eight ten thousants of an inch). This particular book indicates up to a .020" Max TIR (yes thats 20 thousands of an inch)is acceptable. Seems excessive to me.
They do caution to use as such is a judgment call on the owners part.
At .010" TIR I think I'd look for any seal leaks, check the lower end gear lube for evidence of water infiltration, and any cracks in the skeg. If all looked good I'd find and install a new prop, take it out and check for new vibrations that a bent shaft could produce. Recheck for leaks into or out of the gearcase."
 
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