What is best additive for Long Term Storage?

[bobgritz]

I have some older outboards (and other motors, too) that I hope to 'someday get running' but that day will likely not be for a year or two. I use Seafoam occasionally in my everyday motors but wondered if something like Mystery Oil would be better for long term storage. The motors in question are not running and my best guess is to basically load up the cylinders (with ???) and then rotate the crankshaft to lube the cylinders. I guess I need something to prevent sticking, moisture buildup, etc.

Another thought ... perhaps the spark plugs should be pulled and an oil soaked rag inserted to prevent condensation?

 

[kbait]

Re: What is best additive for Long Term Storage?

Drain carbs/tanks and add lube of your choice to cylinders and spin it around. Shouldn't need to remove plugs if oiled-up inside.

 

[Capt Ken]

Re: What is best additive for Long Term Storage?

Run the engine on high idle, spray fogging oil lightly into the carb for maybe 10 seconds then spray a heavy dose and stall it out. remove the drain screw from the carb, disconnect the incoming fuel line from the filter, blow air lightly through to the carb to get all the fuel out, reinstall the drain screw. Spray the remaining fogging oil over the outside of the engine.

 

[HighTrim]

Re: What is best additive for Long Term Storage?

I have alot of motors I dont get a chance to even get out of my basement to run for a few years at a time.

You dont even need to run them to fog them. Spray the fogging oil into the carb throat while pulling over and the vaccuum created in the intake manifold will pull the fogging oil into the powerhead. I then pull the plugs spray a bit more into cylinders, rotate flywheel by hand a couple turns, then reinstall plugs.

I do this about once a year for my stored motors.

I use WD40 to mist the powerhead to prevent corrosion as well.