****** Please Note ******
This SBT Housing Insert / Wear Ring will work only with SBT Jet Pump Housings and NOT the Original Yamaha Jet Pump Housing.
The housing insert /wear ring aids in stopping speed-rubbing cavitations in your worn jet pump.
The SBT Delrin wear rings and liners will restore the tight clearance between your impeller and wear ring.
A PWC Wear Ring is a sacrificial ring that is installed into the jet pump to provide a minimal clearance for the impeller to build thrust.
More specifically, SBT has engineered this replacement PWC Wear Ring for reduced friction using one hundred percent Delrin instead of fiberglass filled plastics.
Polyoxymethylene or polyacetal, commonly known as Delrin, is an engineering thermoplastic used in precision parts that require high stiffness, low friction and excellent dimensional stability. The Delrin wear rings have very low water absorption and are chemically resistant because they are acetal based plastics. The SBT wear rings perform better and are more economical, which allows you to replace the wear ring every time you are doing work on the jet pump. T jet pump housings and not OEM jet pump housings.
