2004 Polaris Freedom, Virage, Genesis and MSX-140 Service Manual., Page 207Get this manual
PROPULSION Sacrificial Anode
A zinc sacrificial anode is in place on all models on the pump housingThe purpose of the anode 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 anode3Apply dielectric grease to bolt threads and contact surfaces4Tighten bolt securelyNOTE: During preventative maintenance, verify that the anode is tightened securely to the pump housingReplace sacrificial anode whenever anode shows signs of erosion