"Glenn,
Stablize the gas an
"Glenn,
Stablize the gas and then run the motor for a bit to get it through the system (helps prevent gumming), then disconnect the fuel source and let the carb(s) run out of gas. Or better yet, remove and drain them.
If you use fogging oil it can be sprayed through the carb while you are running the stablizer through. Otherwise, pull the plugs and spray fogging oil (or WD40 or the like) right into the cylinders.
A shot of fogging oil over the rest of the powerhead, wiring etc sure doesn't hurt either.
Change your lower unit oil. If there is any water in it (and in northern climates it is far more likely to have water in it), you will get it out preventing any freeze issues.
If your impeller is due to be changed, do it now, ditto the spark plugs, that way you will be ready in the spring instead of scrambling at the last minute when the ice goes out early.
Store the motor in it's normal upright position - if on the boat, trimmed all the way down - DO NOT leave it tilted - gravity will take care of the rest as far as draining any residual water in the motor.
If not parked inside or otherwise under cover - cover the motor up. In fact covering it anytime is a good thing. More impellers fail from being baked by the sun hitting a outboard "out of water" than probably most other factors.
Wrap it up with a tarp, completely, if stored outside...."