Pump impeller fail can happen in a couple of ways. 1st would be from wear & tear. The 2nd is from damage to the impeller & wear ring from objects and debris being sucked up into the jet pump system. 3rd reason to switch out your stock impeller is for better performance out of your PWC or boat. Replacing stock impellers to get the maximum power from your jet ski or boat especially for watercraft racers is a plus.
Do you have power loss/ performance loss? Are you having cavitation issue?
Look from the back of your ski or boat forward through exit nozzle and if you see dings are on your impeller? If So, Then that blade could be knocked out of degree and it is probably best you switch it out.
The Impeller PROS
Jet Ski News & Jet Boat
Jet Ski news & Jet Boat info for Yamaha Waverunner Sea Doo Polaris Jet Ski Honda pwc & Boats. Including: events, racing clubs, models manufactures Impellers props and boating. A watercraft PWC Jetski Magazine.