remwines
Senior Member
- Joined
- Aug 22, 2011
- Messages
- 122
- Location
- USA
- Vessel Name
- Down East Yankee
- Vessel Make
- Defever 40 by Down East
One problem you may run into is that the heater system may cool the engine system more than normal.
To avoid over-cooling from auxiliary heater systems, Cummins supplies a restricted hose fitting, PN 3916256. Here is a link to the Cummins B and C Series engine installation (2015) courtesy of Seaboard Marine. Go to page 35 for Auxiliary Heating Circuits.
http://www.sbmar.com/wp-content/uploads/2015/01/B-C-Installation-Directions.pdf
I'm preparing a 6B5.9M that will be going in my boat next month, and I am using that fitting. I thought about using a regular NPT/hose barb fitting and an inline valve to control the flow, but the Cummins part just makes it simple.