you proberbly need a new wear ring at best !
also check the clearances on your impelor to ring(in manual)
and check impelor for damage ?
it could be other issues but these are the main ones that cause cavitation!
new wear ring is about £40 gbp and new impelor is about £250 gbp
all instructions for fitting and clearaces will be in manuals supplyed on premium subscription.
or just take it to the dealear and hell charge you about £10000000000000
also add your boat to your avatar !
03 speedster what?