Re: will not fogging your outboard really hurt it?
Jay, let me nit-pic even further.
I have owned outboards for nearly 40 years. Fogging oil has not been available that long, so obviously I did not use it. I also never had an issue with rust on the internals of a 2 cycle outboard. I have owned outboards from 5HP to 150HP(24::1, and 50::1 mix), and never used any fogging oil, and never had any issue. My apologies to Chinewalker, who's opinions I respect. I seem to have questioned the cause of the watermarks and chatter he is seeing on the journals.
I first started using fogging oil on my 4 cycle sterndrive, to keep the rust on the inside of the cast iron intake and exhaust manifolds under control. I also mixed some 2 cycle oil into the gasoline (about 300::1) for the same purpose. I felt that some of the oil would settle in the low places where condensation might collect, during normal running, thereby keepting the mannys from rusting out quicker.
I must admit that recently I have been using fogging oil on my 2 cycle outboards, however, I consider it a case of clay feet on my part. Outboards probably have enough residual oil from the fuel mix(like my experiences from the past 40 years), where fogging oil is overkill. However, not using fogging oil is simply accepting a small risk, which is eliminated with the use of fogging oil.
I guess my biggest objection, and the reason I write the nit-pic posting, is that I simply believe one should understand why you are fogging the motor (and other rituals) and what the quantifiable risks are.