2002 merc 50hp 4S not charging

wi

Cadet
Joined
Jul 17, 2011
Messages
8
Would like to run diagnostics to determine cause of problem. Need to know which wires to test.
 

wi

Cadet
Joined
Jul 17, 2011
Messages
8
Re: 2002 merc 50hp 4S not charging

This motor was just purchased 1 month ago on a 21 foot pontoon. After running for a period of time the volt meter shows decreasing voltage and the motor starts to beep 3 times every few minutes. After putting the battery on a charger everything works fine but the battery begins to get weak again with continued running of the motor and accesories.
 
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