[Rhodes22-list] Yamaha Outboard is overcharging battery

[Fred Kaiser]

Our Yamaha 8 also sometimes puts out more voltage (>15 volts) then
needed to keep the battery charged.  I solved the problem by putting
an on/off switch in line and disconnecting the battery from the motor
when the motor is running.  I also sometimes just turn on cabin lights
when motoring they draw enough current to lower the charge rate to
under 14 volts that seems to help.  Both the motor and AGM battery are
over three years old and seem to be in good shape.

Fred Kaiser
91 Rhodes 22 Fretless
Rock Hall MD

On Sat, Jul 16, 2011 at 10:49 PM, AndrewCom <acomas at verizon.net> wrote:
>
> My Yamaha T9.9 outboard is overcharging my battery (it reads 16.24 Volts at
> the battery).  I changed the Rectifier Regulator (part number
> 6G8-81960-00-00) but it made no difference.  Is there some other part that
> limits the output voltage or did I get a bad part from Yamaha?
> Any thoughts?
> Thanks
> Andrew
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