These systems are primarily us
These systems are primarily used whereby the boat is moored in salt water.
It allows the sea water pump "pull" potable water in and through the engine while it is running.
Some systems allow for salt neutralizing agents to be introduced into the cooling system.
These are fine if you allow operating temperatures to open the engine thermostat!
Turn the supply OFF simultaneously with (or just ahead of) shutting the engine down!
DO NOT use this system to winterize a raw water cooled engine unless you know exactly what you are doing!
Some advertise these as a winterizing tool! Be careful!
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Rick ... aka Ricardo..... AQ series Volvo Penta repair
Portland, Oregon
28' SDN F/B w/ twin Volvo Penta 5.7L DP's
Please... no PMs! Post your questions on the forum.