Re: hub
It means the hub inside the prop is spinning (not catching, kinda like a clutch slipping in a car) which makes the motor rev high. Think if you where to have a car floored, going down the road, and all of a sudden the clutch slips. The motor is going to rev very high, and your not going to go anywhere. Same thing on an outboard.
Many prop shops can press a new hub in there for cheaper than a new prop. Or, you can buy a new prop.
Either way, its not too expensive.
