I have just noticed a vibration through my ski around 2-3k or just off idle, it has a skatty prop. The ski has lost no top end & the vibration goes away after about 3-4 k

I suspected a pump bearing so removed the pump & found a heap of milk shake behind the pump cone. although the shaft still feels fine to turn

Has anyone else had this issue. Its a 2010 fzs approx 25 hours
Is it just a matter of replacing both bearings & seals?

Cheers Dave