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Snapped Prop Shaft on OX66 1999 250HP - WHY?

S

still_bill

Contributing Member
1999 OX66 Yamaha 250HP. I'm pretty sure (but not positive) that I hit something while cruising at 4300rpm (30 knots). Anyhow, I stopped and then tried to go again and thought I had spun the hub. Actually, the prop shaft was snapped-off just inside the seal. Assuming I did hit a log, why would this happen instead of just spinning the hub? Or, could it be a long-term stress fatigue failure? I've never seen this happen to anyone else. The shaft is really beefy, over an inch diameter! Common failure or fluke?
 
Re: Snapped Prop Shaft on OX66 250HP - WHY?

They are meant to snap to protect the rest of the system. But when they do you can usually count on a new lower unit, at least that was my experience. I'm assuming your prop(s) is toast as well?

I had the same thing happen, and the hub did not spin like I thought it would. Snapped the prop shaft instead.
 
Re: Snapped Prop Shaft on OX66 250HP - WHY?

Don't know about the prop. It's at the bottom of the Gulf of Mexico. Maybe I can blame BP?
 
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