Wear ring worn down to fiberglass? PICS

[JonRusso89]

For the past week or so I have been trouble shooting some carb issues. Just yesterday after a couple hours of testing I began to notice some cavitation and a loss of top speed MPH. I just picked up the ski a couple weeks ago and was planning to change the wear ring anyway. So today I pulled the pump and found that the wear ring was completely worn down to the white fiberglass. Just two rings of the black part were left on either side of the prop. I have changed a few wear rings over the years and have never seen this before. What's most shocking to me is that the cavitation was fairly minor and I was still getting about 50 MPH. Anyway, has anyone ever seen this before?

Here are some shitty cell phone pics, what do you think?

 

[Dr Honda]

Yep... I've see the wear rings with the inner black totally gone. I've even seen them after the fiber glass is gone... and it's not much more than a few hunks of rubber.

 

[JonRusso89]

Yep... I've see the wear rings with the inner black totally gone. I've even seen them after the fiber glass is gone... and it's not much more than a few hunks of rubber.

Wow, I guess it could have been worse then. Thanks!