Fogging Oil - how and when to use it?
I have a Yamaha F4A outboard that sits in a somewhat damp shed near the river when not in use.
It is not yet one year old.
It has been used sporadically over the summer and autumn, for a total of about 20 hours.
In November, it refused to start. Upon stripping the engine, it was found to have;
a) jammed throttle valve shaft (corrosion)
b) seized exhaust valve (corrosion)
c) dirty carb due to corrosion
I have now cleaned all these parts up, deseized them, changed the engine oil (no sign of water here) and the motor runs like a dream again. The corrosion was in fact relatively minor - quite easy to clean up, but enough to seize the parts in question solid.
So my question is, who uses fogging oil, and what technique do you employ, as clearly I need some for the future! I will henceforth keep this engine well away from the damp shed. Also, has anyone else experienced these kind of corrosion problems? I also have a Yamaha 60 and 100hp sitting in my garage, which is not really damp, but I am concerned about leaving them overwinter.