I read the "How to Winterize" article and asks you to rotate flywheel (with key off). How do you do this on a Honda 150?

To manually crank the engine, you need to remove the top plastic cover. With the plugs removed, you can turn the crank by hand with a standard 3/8" ratchet. I can not remember what size socket (I think a 14mm).

Turn it clockwise only.

Mike