2001 Polaris SLH, Virage PWC Factory Service Manual, Page 52Get this manual
Maintenance Final DrivePropulsion Sacrificial Anode
A zinc sacrificial anode is in place on all models on the pump housingThe purpose of these anodes is to prevent corrosion of metal parts due to electrolysisThe mounting surfaces must be clean and the mounting bolt tight to maintain good connection between the pump and anode1Periodically inspect anode for excessive wear2Check bolt to be sure it is tightIf the bolt is loose, remove anode and clean mounting surfaces on pump and anode