1990 90 hp Merc

Bigaceks1

Cadet
Joined
Aug 20, 2011
Messages
14
My Cranking Battery doesn't seem to be charging when on the water trolling or otherwise,,keep getting a "LOW VOLTAGE" Display on my Depth Finder after a couple of hrs on the water with just the Depth Finder on which runs off the Cranking Battery.The Battery is a little over 3 years old and took it in twice to get it tested recently,but tested Good! Replaced the Stador in 08. Is the Stador the Alternator?
 

Barnacle_Bill

Admiral
Joined
Feb 8, 2004
Messages
6,469
Re: 1990 90 hp Merc

Check the voltage at the battery with the motor running. At about 1500 RPM you should see 13-15 volts DC. If you don't test your rectifier/regulator.
 
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