I bought old 98 challenger twin rotax. one engine has some trust but not much, other lot of caviltation no forword motion. after a lot of reading I took the impellers housing out and one has original wear ring and all plastic gone lots of gap and impeller dinged and lots of ware. will get new the other has all plastic houseing no metal thinking not original. not sure if its ok or wronge one and I will need to replace it. it has a white wear ring that looks like good gap. but I pulled wear ring out by hand. is this ok.
cavitation on 98 c
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Posted 06 May 2012 - 10:47 PM
All the new Seadoo jet pumps are all plastic you can only get a brass/plastic pump used. The white wear ring is a cheap aftermarket mark one that ususally doen't fit that well thats why it pulls out so easy.The OEM wear rings are best. All OEM wear rings are fiberglass with plastic over them. When you do the wear rings and impller fixes and you still have cavitation look at replacing the boot and carbone ring. The one engine that with all the cavitation sounds like the carbone ring assembly.
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