This is the first year I tried to winterize my sons boat motor it is an 350 i/o. please let me know if I did it right or if I missed something. Sprayed some fogging stuff in the carb. Then removed both exhaust manifolds drain bolts. Removed both drain bolts on the sides of the motor let all the water drain out (Ihope).Reinstalled all plugs. Took off thermostat cover and filled motor with almost 4 gal. of antifreeze water mix 1gal antifreeze to 3/4 gal of water.Then filled all hoses. Anything else I should do.