Just thought I would share this link from the Moomba chat rooms. It took me awhile to find it, but it one of the best posts I have found regarding winterizing an Indmar engine. Really helped me out a lot since I had never winterized my engine myself until this year.

Stongly recommend checking this out if you have any questions about winterizing.

http://www.moomba.com/msgboard/showthread.php?t=6925