2 stroke outboard gas

Okay so this is the first season I've owned a boat, little 12ft aluminum I picked up off another member. I was able to score a 7.5 2 stroke evinrude off a buddy for a good price and she runs mint.

I figure I'm still gonna have about 3 gallons of pre-mixed gas in the tank when I'm done . Will it go bad over winter? If so I can get it disposed of and get fresh stuff for winter, otherwise it will be stored in my garage until I use the motor again.

Now when it comes to storing the boat for the winter, it will be stored outside flipped upside-down at my place and I've traded a favour to a neighbour and he's offered to store the motor in the heated part of his shop whenever I'm done for the season. What's the best course of action for winterizing?...or do I have to with it going into heated storage? Is it worth it/suggested I spray some fogging oil down the plugs?


Mike

Go buy yourself some Johnson/Evinrude 2+4 fuel stabilizer.
I mix this with all my gas regardless if it sits.
It would be good to run the engine with some stabilizer in your gas before storing. There’s always a bit of gas that stays in engine, this would treat it.
Good luck

Personally I like sea foam works as a stabilizer and a carb cleaner. My boss even uses it in his $100,000.00 corvette when storing for the winter.
You might also want to check the oil in the shaft that there is no water in it, usually I change the shaft oil each fall before storage.

In addition to above, drain the tank fuel hose. I find the fuel left in the hose goes bad way before the gas in the tank. Fuel stabilizer is your friend....

I've run sta-bil Marine 360 in the tank since I filled it in the spring. Thanks for the heads up on draining the fuel hose Redbull. And Greatwhite, don't know when the lower oil was last changed so probably doing that before storage aswell

Quote:

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Originally Posted by m1k3_88

And Greatwhite, don't know when the lower oil was last changed so probably doing that before storage aswell

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That is an excellent bit of advice! The only way to tell if the seal is leaking is to drain the oil. Could save the bottom end?

Also my first year with an outboard so thanks for this!

All excellent advice and I will add some more….

Instead of storing that fuel - get out there and use it up! Fall fishing is excellent

I’d advise against storing gas for 7+ months, regardless of the brand or type of fuel conditioner you’re using. Start next season with fresh fuel, preferably ethanol free premium. For storage i’d run stabilized gas through the motor and kill it with the carb full. Spray storage seal or oil in the cylinders, and drain and refill the lower unit gear oil. Bleed your fuel line completely to get rid of the old fuel. Remove prop to make sure no fishing line is wrapped on your prop shaft. Grease shaft and spacers when you put back on and use a new cotter pin. Lube any grease nipples.

I always disconnect the fuel line with the engine idling and let it run until it quits, rather than leaving gas in the carb for several months, even if it is treated.