Block Heater – QSB 230 5.9

[carrata]

Hi! Looking for some advice from the experts:

I want to install an immersion style block heater to my QSB 230 5.9L (SN 46930753).

On my boat, the cabin heat exchange seems to be plumbed to the Block Heater port. My assumption is that red circles should be heat exchange and yellow block heater? What is blue for??

This article confuses me a bit:
https://www.sbmar.com/articles/heater-hookup-ports-for-your-b-c-series-cummins/

I think this article correct for my QSB 230?:
https://www.sbmar.com/articles/screw-in-immersion-type-block-heater-ports/

Thanks for the help!

Topic

[carrata]

Thanks Philip, good suggestion. I will go with the pad.

Next question is whether or not I should bother re-porting the heater hose. Any benefit, or leave it alone?

[Philip]

Have you seen this thread?.. pad heater is the way to go… much simpler.

https://www.sbmar.com/community/topic/block-heaters/

[Author]

Replies