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If it were mine I would be making sure it was properly flushed out with fresh water and maybe a mild additive such as 'Mac's' and well covered with an old blanket or something that can breathe. When it is time to use it again I would take out the plugs and squirt in some oil and turn the motor over by hand ( by the prop) just to lubricate the cylinders. Then kick her in the guts.
Hi fisho,
I have found that when I store Petrol /oil mix engines for an extended time the oil seems to build up to a sludge in the carby and the motor is impossible to start.
Now I flush the motor with fresh water and then disconnect the fuel line and leave running until the engine stops.
When next I want to use it I put in fresh mix and it starts easily.
I agree with the others; good water flush, either no fuel line and run it dry/drop the fuel drain plugs if available, use some engine fogging oil; finally coat engine with inox. Take the fuel with you to use in Car/lawn mower/etc.
3 monthly add 100:1 metho to tank to rid water (car and boat)
2 monthly add Mooreys Upper cyl lube (car and boat)
Yearly decarbon treatment (boat only)