Ken, there are couple of things that you need to do. First, when pulling the boat out at the end of the day lower the motor right down like you said. Then, if you have an electric start hit the key for a second or two, pull the kill switch so as not to start the motor up but even if it fires up there is no harm as long as you don't let it run for more than a few seconds. This procedure clears any water droplets sticking to the impeller blades and the housing which would freeze and possible break off one of the vanes when you strat it up the next day. Second, if you are running an oil injection system you should premix a bit of oil with your fuel, the reasoning here is that the oil pump will not flow enough oil to the motor in extreme cold weather and if you run at WOT you could end up with engine damage. Thirdly, because you may not be using the motor for the remainder of the winter after that particular trip you should make it a practice of using a fuel stabilizer with every fill up. If you follow these easy steps you should not have any problems. Oh, and one more thing, when the temps drop to below freezing the water in the peehole could freeze. Make sure that when you start up the motor in the morning that you check for a water stream. Hope this helps.
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