Re: Best way to preserve/"fog") motors?

[jerry-ahrens]

Fogging is very necessary on any outboard with roller bearings in the crankcase. My favorite method is to have a can of fogging oil and using the red extension tube spray directly into the carb throat while the engine is running. While I’m fogging the motor, I already have the fuel line disconnected… I like to treat the fuel with stabilizer as well. If you know what to listen for, you can hear when the engine has consumed the remaining fuel in the carb bowl, as it will speed up slighty. Continue to fog the motor a few seconds more, then let it die. I don’t worry about removing any spark plugs to squirt oil into the cylinders, because in my opinion, you have already accomplished that. Here on Lake of the Ozarks, it is very rare to see someone fogging an outboard, say on a bass boat, etc. I can’t tell you how many motor’s have come through my shop with rust in the cylinders! Not fogging a modern roller bearing motor will promote crankshaft and bearing rust as well… a good way to ruin your motor. Of course outboards with brass bushings need to be fogged too, IMO.
As far as what fogging oil to use, I think any would work. My preference is Quicksilver which is very good stuff, or I use CRC brand, my personal favorite