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cod

battery charging question

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Replaced the battery on my 418 last week and while the old one was only 3 years old, I was puzzled as to what caused it to die over a 7 day period.  It worked fine all through last winter and for the first part of this mowing season but two weeks ago when I went to start it, nothing.  In fact it even when I tried to charge it, the voltage would rapidly decrease as soon as I took it off of the charger. That said I have another battery now and while the beast was running yesterday I measured the voltage going to the battery at low idle ( 12.9 ), mid idle ( 13.4 ) and high idle ( 14.1 ).  Is it possible that at high idle I'm cooking the battery?  Have any of you looked into a additional regulator that would keep the charging voltage at a level that charges the battery but never gets high enough to over charge it?  I believe the existing regulator is working but anything over 14v seems like you may be damaging the battery if your mowing for 2 or 3 hours.

 

Thanks in advance - Cod

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14.1 is perfect for a running tractor. I have seen perfectly good batteries suddenly die within hours or a few days. I would make sure there isn't a parasitic draw on the battery. Grass clippings across a fuse is one way it can happen. To me it sounds like a plate in your old battery broke and shorted. Make sure your battery hold down is good.

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Thanks Mike!

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5 hours ago, cod said:

battery on my 418 last week and while the old one was only 3 years old,

If you got three years out of a battery I would say you did well. As Mike said, 14 +/- volts is fine, I have had them be fine in the morning and wouldn't do a thing the same afternoon.

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