I'm new to the seadoo line. I can take a Kawa apart in no time but I just picked up a used GTX-RFI. It seems the engine is locked. The woman I bought it from did not maintain anything and the Doo has been sitting for over a year...maybe more. My question is should I try to turn the crankcase (if yes, which part should i try to turn?) and free up the engine or just suck it up and take it to seadoo for a engine rebuild? Does anyone know ball part what that would cost?