JRemington
New member
1985 Thompson 4.3. Installed the new GPS and Downrigger’s and took it out to test everything. Got the lines down and within 15 minutes the alt was under 12 volts. Had a voltmeter and checked the voltage at the battery and it was 12.37. Shut the motor off and it was 12.37 so I was only measuring stored battery voltage. Started it back up, pulled the pos terminal and she stalled. The local marina wants $300 for a new alternator. Am I to assume based on this information the alternator is bad? The Mercruiser part number is 98555 and the Vendor part number is AR150-AA. Does anyone know where to get one online or where to have it rebuilt in the Watertown NY area? I’m hoping Bondo might know someone local.
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