Rock inside the lower ?
 

Was putting on my new prop and when I looked behind the drive shaft (in the tube) there was a rock. It's very brittle so I tried to break it up and now it's just siting farther back kinda stuck in the tube. It was just to big to come out the tube. Does anyone know what this is ? It must be a build up of something ? Also do I have to worry about it since the drive shaft spins freely i don't believe it's touching it. Thanks

When you say the tube, do you mean the carrier??What drive are we talking about???

Would it possibly be the remnants of an anode ( 2 small bolts holding nothing in the carrier visible by chance)?

It's a bravo 1. Behind the shaft where the prop bolts on to.

no maybe get a small drill and drill it to brake it up and use a shop vac to suck everthing out

It's the 4th of July put a firecracker in there and blow it out!

Any idea what would build up like that ? Is a fresh water boat. Had my fun on the 1st. Back to work today :(

Is it the anode that got corroded and came off?

I think that's what it is. I will try to drill/dremel it and see what happens.