Re: winterizing outboard

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Posted by Ken Denman ( on November 01, 2005 at 12:13:44:

In Reply to: winterizing outboard posted by wayne on October 31, 2005 at 21:25:14:

There's 5 key items when winterizing:
1) Lower unit oil - drain and replace. Keep an eye out for water in the oil. If the oil is a milky color, then it has water emulsified in it. Either case is sufficient to start looking at seal replacement.
2) Fuel system - drain or stabilize. Either add stabilizer to the fuel tank and run for 10-15 minutes, or unplug the fuel line and run the engine dry.
3) Fogging - pull the plugs and spray engine storage spray in the holes - turn the motor over several times to distribute. While this step is not strictly necessary for over-winter storage, I've seen many locked up engines where the owner put it away with intentions of using it the following season. When overtaken by events, the motors have sat for 5-10 years and locked up.
4) Flush with fresh water and drain - no antifreeze is necessary. If you run your motor in salt or brackish water - you must flush. Make sure all the tiny drain holes in the lower castings run freely.
5) Store the motor upright on a stand or on the boat. Many lower units have been damaged by the weight of the motor on the casting. Storing the engine on it's side may allow residual moisture in the lower seals or cylinders.

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