Thread: 1994 Mercury 200 2.5 offshore overheat alarm at higher speed.
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Unread 11-02-2016, 06:02 PM
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phatdaddy phatdaddy is offline
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Join Date: Mar 2003
Location: south of I-10
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like ferm said, get a water pressure gauge. i'd rather have that than a tach. a new water pump will deliver about 12-14 psi at 4000 rpm's. when mine would fall between 8-10psi, i knew it was time for a new pump.
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