You can get a shop manual here if you buy their premium membership. It's not expensive at all, and you get first dibs on all troubleshooting questions.
You have to completely remove the jet pump to take the impeller off. You'll need: A Vise, impeller removal tool, 1/2" breaker bar, blue locktite, seadoo pump oil, torque bar, hacksaw or dremel for wear ring removal, silicone, patience and some beer. Easy to do though. :cheers: