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Old 08-07-2008, 07:58 PM
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Acnas Acnas is offline
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Join Date: May 2005
Location: Epping, NH
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Default 2005 Merc outboard High Temp
Friend has a 2005 Merc 150 outboard on a 19 Trophy CC. At 2000-2500 rpm temp gauge climbs to 200-240 within 5 min. Water shoots out of the hose and feels hot. Has steam showing at the back of motor. We never ran hot to get buzzer to sound. At other rpms temp is fine. New thermostats and pop valves. Water pump is new as well and installed correctly. These are trolling rpms so we are hurting. Any help would be great.
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