[eherlihy]

To winterize the outboard;

1. connect a fresh water supply to the engine. Some engines have a hose connector, with some you use "ear muffs," and some you run in a trash barrel filled with water.
2. start the engine, and let it warm up
3. disconnect the fuel supply
4. when the engine starts to sputter from lack of fuel, spray fogging oil into the carburetor and let it die.
5. turn off the water if you used a hose to flush the engine
6. change the engine oil (assuming that you have a 4-stroke)
7. remove the sparkplug, and give a shot of fogging oil in each cylinder.
8. replace the sparkplug, but do not reconnect the sparkplug wire (do that in the spring)
9. crank the engine over 1 or 2 revolutions to spread the oil
10. change the lower unit oil
11. cover the engine, and put it away

 

[eherlihy]

The best that you can do at this point is treat it right from now on... or buy a new motor...