Prop with Insert?

[myoldboat2]

I'm used to Mercruiser props with the splined hole in the middle an integral part of the prop. I picked up a rebuilt prop and later found that the splined hole in this prop is part of an insert that can slide out. The outside of the insert is tapered like a cone and has 3 or 4 squared off teeth that mate into the larger hole in the middle of the prop. When the insert is pushed into the hole and turned, it clicks a little--like there is some slop there. Maybe when it's bolted down it will tighten in.

What the heck is this insert kind of prop?

 

[steelespike]

Re: Prop with Insert?

The "insert",actually refered to as a hub, allows a somewhat reduced prop cost after the initial investment.
Also if a prop size is right for a different application with a different spline count
you only have to buy a hub to switch props.I assume your hub, will tighten up when you tighten the prop nut.

 

[sethjon]

Re: Prop with Insert?

It s a hub and is normal. You should not hear any clciking. Make sure the hub is the right one for the prop.