Low night time temps.

[Hachimo]

Courious to see what some of you guys are doin with Your boats with these couple days of cold temps. Last night it hit 29 at my house And my boat still has water in the system. Its gonna get a little colder yet tonight/tomarrow. I really dont want to do a full winterization for two nights of just below freezing but also dont want a catastrophic failure next time I take it. Im thinkin probly  safe if I drain the block and maybe run a gallon of Marine antifreeze trou the raw water pump. When I winterized it before this winter I was a few days late and pulled the lines of the pump and there was ice. Tried to start to flush system with antifreeze and snapped the shaft in raw water pump. Stupid $300 mistake. Luckily that was the only damage. 

[chinook35]

Courious to see what some of you guys are doin with Your boats with these couple days of cold temps. Last night it hit 29 at my house And my boat still has water in the system. Its gonna get a little colder yet tonight/tomarrow. I really dont want to do a full winterization for two nights of just below freezing but also dont want a catastrophic failure next time I take it. Im thinkin probly  safe if I drain the block and maybe run a gallon of Marine antifreeze trou the raw water pump. When I winterized it before this winter I was a few days late and pulled the lines of the pump and there was ice. Tried to start to flush system with antifreeze and snapped the shaft in raw water pump. Stupid $300 mistake. Luckily that was the only damage. 

I don’t worry about my mercruiser sterndrive / engine until it gets below 20 The engine is covered and that provides insulation never had a problem in 30 years. Knock wood. Lol


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[Earl28]

Engine compartment heaters! Check them out.

[thumbburn]

I just throw a drop light in my doghouse just to make me feel warm and cozy


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[windburn]

We had 14 degrees last night. Luckily I haven't run the I/O yet even though closed cooling system.

[chinook35]

We had 14 degrees last night. Luckily I haven't run the I/O yet even though closed cooling system.

Wow. We got down to 28 in Watertown. I’d be concerned at 14


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[Hachimo]

Didnt like the look of the ice so i ran two gallons of marine/rv coolant trou it. Better safe then sorry. My luck i would wait it out till virus cools down, get up to launch to have freeze damage. 
14• I would defined be consernded.  

[jimski2]

Our USCG boats in Alaska had engine antifreeze heaters also. This kept our engines warmed up to prevent freezing, easy starting, lessens cylinder and ring damage and emergency response operation. The sea water which was salty did not crack the pumps, heat exchanger, exhaust manifold cracking and piping. Our larger vessels water sections were filled with oil  but that was outlawed. Today an air compressor pushes the water out of the systems with vent fittings showing a lack of water and closing them up to keep them with air. When the sea chest showed air bubbling out, then things were accepted as ice free.