Fat kings. Food for kings.
Be gentle with me...dumb question...do you pull your boat out daily in winter or do you moor it? So if you moor it...what happens if it is pretty cold in the morning and you crank it over, does ice damage the raw water pump impeller? If you pull the boat at night, do you dry crank it to clear the impeller. I know they supposedly are self draining and normal salinity water doesn't freeze much until it drops to 28 or so.
I keep it in the harbor. I keep engines in the water which is always above freezing. Never had had impeller issues. I am lower SE ak. Usually it’s above freezing