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Old 10-23-2019, 09:31 PM   #20
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City: Seattle
Country: USA
Vessel Name: Rendezvous
Vessel Model: Ocean Alexander 420 Sundeck
Join Date: Sep 2018
Posts: 316
Originally Posted by Retriever View Post
Steve, I put a 250w oil pan heater on my 5.9 liter Cummins several years ago and I like it better than the block heater that preceded it (and failed).

The oil pan heater uses a lot less power (the block heater was 1500w IIRC.), so I leave it on all winter. The big block heater seemed large to leave running 24/7, and it simply wasnít practical to leave running on a 30 amp connection while living aboard the boat (although you might solve that with automated load shedding or a modern inverter thatís can supplement the 30 amp shore power). I also feel better about leaving the boat unattended with a lower draw ER heater.

With the oil pan heater running 24/7, the engine starts instantly with very little smoke at all temperatures we experience in the PNW. Without the oil heater, starting is noticeably smokier and slower, especially with a cold soaked engine room in winter.
Thanks Sam! The coolant heater will likely help more, but it is a much bigger install and huge cost in my case.

I think I will try a couple of 250W oil pan heaters to start, as they would replace the 500W air heater I leave in the room anyhow.

I don't live aboard technically, but I am on the boat almost every day, and with 30 amps as well, having more than that would be problematic, even with the fancy Victron system I have now.
Steve Mitchell - Editor
m/v Rendezvous
1988 Ocean Alexander 420 Sundeck
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