Join Date: Jan 2007
Location: Alta Loma, Ca.
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I had a similar problem with the Universal 25 on my Catalina 30. I started at the impeller and worked toward the heat exchanger. Disconnect a hose and turn the engine over with the kill switch on, to see if I had any flow. In my case the impeller was ok, but i had rock like deposits built up in the o/p from the impeller housing. I cleared those and thought I was home free and when I pulled the hose going into the heat exchaner, good flow. When I pulled the hose going out of the exchanger, hardly any flow. My Heat Exchanger was bad. I could not boil it out and ended up installing a new exchanger. Problem fixed. Good luck.
Long Beach, Ca.
s/v Namaste - 86 Catalina 30 , Tall Rig
The optimist expects the wind. The pessimist complains about the wind. The realist adjusts the sails.