Anyone know where I could locate a detailed service manual for a 2001 Yamaha XL800 Waverunner? I have the owner's manual, but need something that will help me tear into my ski and check some items out. I may have an issue with my impeller and wear ring (whatever that is), but don't know the first thing about checking those items out! I consider myself pretty handy and would like to tackle these things myself. Thanks.