75 tracker/mercury voltage problem please help

Jones35

Cadet
Joined
Jul 15, 2013
Messages
6
I have pro team 175 with 75 tracker motor. Boat runs great but when I plain out the voltage on the gauge spike past 18 volts and after a couple of mins pops the main fuse on the motor. Also when it's cooler outside the voltage is still around the 16-18 volts and takes longer to blow the fuse any one have any ideas? Thanks in advance Kyle
 
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