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Old 11-17-2019, 11:47 PM   #37
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City: Seattle
Country: USA
Vessel Name: Rendezvous
Vessel Model: Ocean Alexander 420 Sundeck
Join Date: Sep 2018
Posts: 315
Originally Posted by Ken E. View Post
Steve, an alternative to the Wolverine-type pan heaters are the immersion type with a heating element in the engine's internal coolant, installed in a block port with pipe threads. I have these, made by Kim, called Hot Starts. I only use them before winter starts or during sub-freezing weather. They are 500 watt and I run them on timers, 2 hours on, 2 hours off, alternating between engines. The engine room stays about 25 degrees above ambient. I've done this through 15 winters with both Detroits and Cummins with no ill effects.
Yeah I would very much prefer to do something like this, but I am having a difficult time finding the correct block port that I can use. The Volvo Penta manuals don't really call them out, although I have found a number of things that look like one. Even searches on and elsewhere have not resulted in a definitive answer.

I'd most likely have to drain the coolant and start experimenting before I could find the right solution...
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1988 Ocean Alexander 420 Sundeck
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