Melting around the battery terminal is a dead giveaway for a poor connection. If the cables themselves are hot, they're way too small. Being positive or negative ground has nothing to do with it, but being 6 volt does. Warm engines are tighter than cold ones and typically harder to turn over if the battery is marginal or the cables are too small.
6 volt starters draw twice the current than equivalent size 12 volt starters do, plus a lot of automotive type cables are designed for small car engines which use relatively small starters & don't draw a lot of current.
6 volt starter cables should be at least 1/0 or 2/0 wire size. What you typically find at the corner auto parts store is #4, which is three or four sizes too small for a 6 volt system.
Any place that deals with heavy equipment or over the road trucks can make you cables. Just give them the length and the size of the lug(s) on the end. NAPA can order them, but they're expensive. I've also made my own using welding cable and crimp/solder terminals.
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Today's Featured Article - On the Road with Dave Gohl: Auction Musings - by Dave Gohl. I was thinking the other day about all the auctions I've been to in the last few years. There've been many. Some have been very good, some have been well, disappointing to say the least. But no matter how good or bad auctions may be, we always seem to stay until the item we've come for or are interested in is on the block. I've been to some auctions near and far. I think the furthest has been the Two Cylinder 7 in the Amana Colonies last year. Lots of stuff, lots of people. I've also atten
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