Re: Jump Starting 6 volt with 12 volts

Posted by Bob M on January 16, 2004 at 13:33:25 from (165.170.128.65):

In Reply to: Jump Starting 6 volt with 12 volts posted by Ronald Vogt on January 16, 2004 at 12:25:02:

So long as you don't let the motor on the 6 volt tractor run up fast enough to cause the generator to try to charge the battery after the engine fires, jumping with 12 volts will cause no harm. Been doing it myself for years.

However as the others warn BE CAREFUL!! Make the final jumper cable connection to a frame ground as far as possible from both batteries. (Hasn't happened to me but I know others who've had a battery explode when jumping...) Employ an assistant to keep jumper the connection as brief as possible - make the connection just before you begin to crank and disconnect the instant the engine fires (or the instant you quit cranking). Don't crank too long! If the motor doesn't fire in a few seconds STOP, and determine why. A 6 volt starter will not survive a long grind on 12 volts!

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