OS 4 Stroke Engine Cleaning

If it will turn over, pour a bit of Marvel air tool oil into the cylinder thru the glow plug hole... Remove the backplate and pour a bit of the same into the crankcase. remove the valve cover and lube the valve train

Turn it over till it frees up, then replace the valve cover, backplate & plug and fire 'er up....

Bill

Buddy gave me an old ST .40 engine that was completely siezed up - carb too. Filled it with Marvel Mystery Oil and let it sit.. A week or so later I was able to get it to turn, albeit not easily. Another dose of oil and another week and it turns over freely. Carb barrel rotates easily as well.

I don't see why it wont run after I clean all the excess oil out of it...

Flush it out with some clean fuel.

if its gotten sticky from sitting... you need to disassemble an

inspect.

At a minimum pull the backplate and look for rust inside

-- fhhuber50677

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Hey thanks for all of the info. I will try each idea until it starts working again. Thanks Again

Hey thanks for all of the info. I will try each idea until it starts working again. Thanks Again