4 Stroke Winterizing

Add a good healty dose of Sea Foam to the gasoline running the motor to make sure the mix is up into the injectors/carbs, top off the tank as full as you can get it (no dead air space means no place for condensation to add H2O to your fuel in storage), change the oil, change the lower unit lube, fully charge the batteries and if possible pull them and put them somewhere they won't freeze, cover the boat and forget about it until spring.

A fuel injected 4 stroke is pretty simple. Just change the lower unit oil, the engine oil, and grease the the various spots that are listed in the manual(the propeller shaft is the more important)
Then remove the spark plugs and spray seafoam or fogging oil in each cylinder. Also make sure the fuel is stabilized and full, or empty the tank the best you can, either method is fine, in between is not.

what would you do to your car if you were going to park it for 5 or 6 months.  It's as simple as that.  I would never spray fogging oil in the cylinders of a direct injected outboard.  that stuff can and will plug injectors.  it's not necessary on four strokes.  If your concerned about moisture in the cylinders remove the spark plugs and install desicant plugs in and reinstall spark plugs in the spring.  but that is really not necessary. 

eyexer Said:
what would you do to your car if you were going to park it for 5 or 6 months.  It's as simple as that.  I would never spray fogging oil in the cylinders of a direct injected outboard.  that stuff can and will plug injectors.  it's not necessary on four strokes.  If your concerned about moisture in the cylinders remove the spark plugs and install desicant plugs in and reinstall spark plugs in the spring.  but that is really not necessary. 

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