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I have a seadoo spi and was going to check my wear ring when i took off the housing the impeller was a little loose so i pulled and it just fell off. From what I understood u need a tool to get the impeller off what am I missing for it to just pull off like that is it something on the shaft or something on the impeller that keeps it on.
 

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impeller

impeller simply threads on tightening clockwise,on the yamaha there reverse threads check with your service manual,when changing impellers put on a coat of ANTI SIEZE on the threads.The impeller must tighten to torque specs.How the impeller was so loose is anyones guess.There are usally 2 tools for impeller change , one is to hold and cover the driveshaft spline so driveshaft stays still and the other is to go over nut part of the impeller so when you tighten your not crimping the impeller itself, it easily slides off. Check with SD to see which exact tools you need,i hope this helps:)
 
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