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When fogging the outboard engine for winter storage, why is it suggested to remove the spark plugs, and squirt the fogging oil into the cylinders ? The fogging oil has already gone completely through the entire combustion chamber (coating it) when it was introduced to it via the carburators. Seem's like a wasted step to me, any opinions ?
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It was my understanding when I used to spray fogging oil into the carbs (before I had an engine with the input port by the choke) that the front end fogging was mainly to keep the reed box protected during storage. The engine is still running when either method of charge of fogging oil is introduced, and combustion may inhibit quality distribution in the cylinders. The other thought is that compared to gas, fogging oil is thicker and heavier and I'm not sure how well the carb is able to atomize and distribute the mix to the upper end of the cylinder walls. It is a pain to pull the plugs and fog manually, but I've always done it anyway for "cheap" insurance as any resultant problems from not having fogged it completely would be significantly more of a hassle.
