View Full Version : Pressure cap for cooling system

04-30-2009, 07:15 PM
"I have an MD-11C with "factory" freshwater cooling from Sabre (Sabre 34). It is based on a double Johnson pump, one stacked on the other, in case this helps identify the system.

It looks like at some point in recent history the pressure cap was replaced by a Stant 4 psi cap. This seems like a very low rating, but I don't know for sure. Anyone have a good idea of what pressure these systems should run?


05-16-2009, 09:08 AM
"Partial answer to myself:

The freshwater cooling system is a Sen-Dure unit. Sen-Dure offers two pressure caps in their catalog, a 7 psi and a 13 psi. I have an email into them for specs, but I haven't heard back yet,

http://www.sen-dure.com/Marine.htm ("")