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Re: Jump Starting a 6 Volt off a 12 volt


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Posted by John T on June 03, 2014 at 04:57:33 from (216.249.72.121):

In Reply to: Jump Starting a 6 Volt off a 12 volt posted by Dave Cole on June 03, 2014 at 04:33:54:

It may or may not damage the "system" depending on where it was made HOWEVER it can damage your eyes or some other part of you if the battery explodes!!!!!!!!!!! Can happen if 12 volts is jumped to a 6 volt battery especially right at its top where explosive gasses and a spark take place !!!!!!!!!

NEVER NEVER make such a 12 volt jump right at the 6 volt battery which can possibly make the battery explode!!!!!!!!!

If you must make such a jump I would (if possible subject to starter switch or solenoid and location and accessibility) just jump the starter ONLY. If it had a switch or solenoid that has an open easy to get to terminal on the starter side (NOT big cable from battery side) you can jump it there and frame ground. If it does NOT have a switch (like a saddle mount mechanical switch where starter post is underneath and you cant get to it) or solenoid where you can get to the starter post this method IS NOT AVAILABLE. Of course (well DUH) the ignition must be on and the tractor battery have sufficient energy to power its ignition coil so a spark develops.

NEVER make a last connection (makes sparks) right at the battery as that's where explosive gasses are !!!!!!!!! You can make the first ungrounded post connection at the battery but then make the last frame ground connection down away from the battery........

If you do a jump BE SURE TO MATCH THE BATTERY POLARITY + to + and - to -

Sure, Ive jumped a 6 volt tractor off a 12 volt source as have many others but I NEVER made such (last connection) at the battery top but on the frame elsewhere and if possible I jumped the starter ONLY if it had a switch or solenoid that made such possible BUT I JUST CANT GO ON RECORD RECOMMENDING IT so do it at your own risk

John T


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