i had noise and cavitacion on the right engine off my speedster 200 on his first 10 hours , so we checked the calibration off the engine with the pump and it was perfect so we changed the carbon ring system and lubricated it a lot and ok the noise was nearly gone.
also we installed a new wearring and now the strange thing was that again the new wearring was eaten up and ejected stuff out off the pump at 2000 rpm on land with the landyard conected i have the 15/20R on both sides and only it happens on the right engine. so what more should i check

thanks for any input
ciao jim