Posted by Bob M on December 26, 2008 at 20:09:57 from (74.74.136.142):
In Reply to: jump starter posted by cris on December 26, 2008 at 19:22:05:
Reason to make the last connection to a grounded member instead of directly to the battery negative post is so any sparking that might occur when the final connection is made happens a distance from the battery. This lessens the chance of a spark igniting H2 gas escaping from the battery and possibly causing it to explode.
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The manual's instructions for jumping a positive ground system ARE correct - you are still connecting pos to pos and neg to neg.
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Theoretically you CAN use a jump box to crank up a 6 volt tractor (I've done it...). But it's not recommended for a couple reasons:
- It may overload and ruin the jump box (I've done that TOO...!).
- If your Craftsman jump box is like my son's it has some internal logic that shuts it down if you try to connect it with the polarity reversed, or if you connect to 6 volt system. It simply won't work.
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