Most (90% plus) spun hubs occur under one of two scenarios:
1. Full-throttle accelleration from idle or full-stop. the sudden application of maximum torque causes the hub to slip, either at its vulcanization point; or at the point of maximum centrifigal effect, which is the corners of the squared insert. OR
2. At mid-torque throttle settings, the vessel buries it's bow into the backside of a wave, and the operator does not momentarily retard the throttle to reduce the application of torque while waiting for the bow to rise.
Most of us don't "mash the gas" on our wheeled vehicles from a stop, nor should we do it on our boats.
Steady accelleration will avoid the hassle and expense of a spun hub.
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Common Sense is learning from your mistakes. Wisdom is learning from the other guy's mistakes.
Fr. Frank says:
Jesus liked fishing, too. He even walked on water to get to the boat!
Currently without a SeaCraft 
(2) Pompano 12' fishing kayaks
'73 Cobia 18' prototype "Casting Skiff", 70hp Mercury
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