X2 on the Alan Tani suggestion! There are also some links there to Youtube videos of breakdown , re-assembly and general maintenance for quite a few models there as well. Skrilla is absolutely right about the Yamaha marine grease as well, it's been a life saver for mine especially as mine have taken more than their fair share of dunks in the salt thanks to my less than stellar landings in the surf!
I use one of those pill boxes that are laid out for a week to help me keep track of the screws and their order.
Just my .02 cents