Hi,
There is a lot of articles describing how to time a motor on this site and other sites. I think all the motors are timed in the same manner.
The best one I've stumbled on at:
http://www.rcgroups.com/
There is an article there by Peter Khor called:
Timing GWS 370 motor - step-bystep tutorial.
I would suggest you do a search on this site first, then explore the above site for both the under water break in and timing.
Hope this helps.
Wayne Miller