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post #4 of Old 09-28-2012
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Re: Universal 5411 Cooling

My 5411 raw water cooling system is exactly as described in the manual, and I get a temperature range from around 100 to 136 degrees F. I get the same amount of water through the exhaust port as you described in your case. A few years ago, the 5411 was always running too cold (around 100 deg F max) so I reduced the 5/8 inch line from the bottom of the thermostat housing to around 3/8 inch using a home-made brass insert. That resulted in up to 136 deg F, which I believe is much better for the engine. just my 2 cents.
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