Here is my plans. I live in Maryland and the winter here is never that bad. I bought 2 600 W Xtreme Heaters. One for each engine. Last year I had the BS heater 700 W, but it was so big I could only put it on the far side of the bilge.
I just didn’t feel good about the BS heater. But these Xtreme heaters are so small I put a 600 w under each engine. That should keep the bilge nice and toasty. Maybe a little overkill, but I like overkill.
– Gripit offshoreonly.com