Winterize a Mercury engine
Gray Recommends this one
Below are the steps to winterize a Mercury engine.
(Source: http://seadoosportboats.com/topic/5273-how-to-winterize-mercury/)
Note: I added the comment about not needing to change the engine oil since this is a 2-stroke engine.
Winterizing and De-Winterizing your Boat
Winterizing
Winterizing your boat for the majority of us is the most dreaded day of the year. Warm weather is gone and so starts the wait for spring temperatures so we can hit the water again next season. Take these protective measures to assure your boat will greet you with a happy face when warm weather welcomes you again in a few months.
Standard Winterization
- Run a fogging solution through the boat engine while it is running to protect internal parts
- Spray a protective anti-corrosion film on the external parts of engine
- Drain the engine block and manifolds and fill the engine with anti-freeze (Not necessary with Sea Doo Utopia- it’s self draining)
- Drain the lower unit gear oil and refill with fresh oil (stern drives only)
- Grease all external fillings on stern drives
- Disconnect the battery/batteries and store somewhere warm
- Cover your boat
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Mercury SportJet M2 JetDrive Winterizing/100 Hour Maintenance
(Source: http://articles.richardhartman.net/jetboat/mercurym2winterization.htm)
There are two lube areas on the M2: The front of the impeller shaft (where the driveshaft and impeller shaft are connected via a set of bevel gears) and the rear of the impeller shaft (inside the stator). To do this job you’ll need a metric socket set, large flatblade screwdriver, 1/4 inch Allen wrench, two bottles of Mercury High Performance Gear Lube+, Mercury lube hand pump, oil drain pan, wire brush, thread sealant, antiseize, and blue (medium strength) Loctite.
Adjust the trailer jack so the ride plate on the jetdrive is level.
Remove the center (fill/drain) plug in front of the intake grate. Use a large flatblade so you don’t ding up the screw. Don’t lose the little fiber washer underneath the screw.
Official Mercury Winterization Process for 240EFI Engine
(Source: http://articles.richardhartman.net/jetboat/mercury240efiwinterization.htm)
In a small outboard fuel tank, mix fresh non-alcohol/ethanol gasoline with the recommended amount of fuel stabilizer and Mercury Quickleen. Add twice the normal amount of Mercury Premium Plus 2-stroke oil. (RLH note: Mercury calls this “witch’s brew”.)
Disconnect the main fuel tank hose from the engine’s inline fuel filter and connect the outboard fuel tank hose in its place. Connect water line to flush port and turn on water. Start and idle engine.
Run until smell of exhaust changes, indicating that “witch’s brew” has made it through the entire engine. Stop engine. Disconnect temp fuel tank and drain any remaining contents into main fuel tank.
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