Frozen Yamaha Jet pump housing

I have a Yamaha GP 1200 and A Yamaha Waveriader 700. Both of these Jetskis had their Yamaha impellers freeze up in the Yamaha jet pump housing. My mechanic said this was the result of salt ( I run these PWC's in salt water) getting behind the impeller housing and causing expansion of housings into impellers. The JetSki mechanic suggested that I hose off the impeller and housing after each use. The Yamaha GP1200 has a Solaris SS impeller while the 700 is stock. Thanks for your assistance.
Buck

Hi Buck, Your mechanic is right and you should wash off salt every time you ride Jetski watercraft in ocean. It will help preserve your jet ski and its jet ski parts. The Yamaha Jet pump housing has this issue of becoming out of round due to a chemical reaction behind the Yamaha wear ring. We offer a solid steel Yamaha pump housing that will solve this problem.
​Watercraft Mechanic PRO