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Most outboards are watercooled. As long as the engine is running and the engine is in the water, water is pulled in and pumped out. This implies that if the lower portion of the engine is not in the water, its not being cooled, which clearly is bad.
When storing any motor or engine for extended periods of time, but in particular 2-strokes and very much in particular if you run it in salt water, you want to 'fog' the engine. I don't know the offical term, I've just always called it 'fogging'. But its just storage spray, bought at your local all purpose hardware type store.
Now, to 'fog' an engine it needs to be running for a few minutes, longer then it is safe to run without cooling. So you get a muff system, which is a cheap little gadget that hooks up to your garden hose. Two rubber discs, one with a female hose coupler, attached by a length of flexible aluminum tubing. They look somewhat like a pair of earmuffs, but a little straighter. They slide onto your the lower end of your leg and fit pretty firmly. Then you can turn on the hose as strong as possible without blowing off the muffs, and you can run your engine as long as you need to fog the carbs (your 175 should have 2) untill it stalls out.
I've assumed from that start that we are talking about a regular outboard. Just wanted to confirm that.
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