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I HAVE A 1999 YAMAHA 250TURX WITH TWO BATTERY SYSTEM, WHEN ON BATTERY #2 WITH KEY ON VOLTAGE READS 12, WITH ENGINE RUNNING VOLTAGE IS AT 14, WHEN ON BATTERY #1 W/ KEY ON VOLTAGE READS 12, WITH ENGINE RUNNING VOLTAGE ONLY GOES UP TO 12.2, INDICATING NOT CHARGING, BUT BATTERY APPEARS FINE WHEN STARTING, EVEN AFTER RUNNING LIVEWELL, VHF, D/S, GPS, ALL DAY, ALL TERMINALS TIGHT AND CLEAN,,, ANY IDEAS?
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if it aint broke? only sounds like 1 is a bit weaker than 2 ?? -
GB,
Your cranking battery should charge up to 14+ volts after starting the motor, but this may take as much as 10 minutes of running, depending on what condition the battery was in before cranking.
A fully charged battery, at rest, no load, should read about 12.6 volts. A fully discharged battery will read 11.8 volts. This assumes all the battery cells are in good condition.
Sounds like you have a bad cell in battery #1.
Good luck [img]smile.gif[/img] ,
Ken KComment
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THANKS FOR ADVICE, I AM GOING TO SWITCH BATTERIES AND CHECK VOLTAGEComment
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