Dave,
8 volt batteries are/were fairly common on older farm tractors. The 6
volt batteries just didn't get the engines to turn over very fast and
had a weak spark, probably from lack of maintenance of the electrical
system. When I bought my 1952 Farmall Super C, it had an 8 volt battery
in it. It worked fine until the battery died. Rather than put in another
8 volt battery (still very available here in farm country), I replaced
the coil and generator with 12 volt parts. It has worked fine ever
since. I have some lights to get working on it, but there is no rush, I
don't use it after dark and have higher priority use of my time.
Peace,
Pat
Thusly spake David C.:
> And yet another somewhat unrelated data point....
>
> Back in the late '70s I had a '51 (or so) GMC half ton pickup. 6 volt
> system, starter via a pedal on the floor. Ignition switch was a toggle
> on the dash. Manual choke. Pull the choke out, step on the starter
> pedal, after it turned over once or twice, flip the toggle; started
> right up. It had an EIGHT volt battery in it, no other changes. I
> understand the regulator had been adjusted for enough output to keep it
> charged. Lights and everything else worked as normal. The electrical
> system was one of the few things on that truck I DIDN'T have problems
> with.
>
> Dave C
>
> Arvid Jedlicka wrote:
>
>> Note that this does not condone the practice. It simply represents my
>> experience.
>>
>> When growing up we had a '40 Ford flathead v8 dump truck that we would use
>> for snow removal. When it would not start on the 6 volt system - often in
>> the winter - we would disconnect one of the 6 volt battery cables and jump
>> it with a 12 volt battery. The starter would spin - I believe the technical
>> term is VERY FAST - and there was plenty of spark so it started very
>> quickly. Once started we would quickly move the battery cable back to the 6
>> volt system.
>>
>> We eventually got a snow blower but the truck was still running when it was
>> replaced.
>>
>> Arvid
>>
>>
>>
>>> alternatively, can I jump the starter with 12v without fritzing the
>>> rest of the electrical system?
>>>
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--
Pat Horne, Owner, Horne Systems
(512) 797-7501 Voice 5026 FM 2001
Pat@HorneSystemsTx.com Lockhart, TX 78644-4443
www.hornesystemstx.com
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