great site. I have had the boat since 5/2002 i didn't know you guys were out there , i put in a rebuilt 7.4liter 2.5 seasons ago , and added a merc. 1/2 freshwater cooling system, my prob is the over flow tank will fill up But not drain back into the heat exchanger , untill you crack the cap on the heat exchanger. ANY IDEAS . the tank is mounted on the wall above the gas tank. i had the exchanger neck replaced, along w another merc 16 lb cap....
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