Posted by John T on January 20, 2010 at 06:42:17 from (71.52.15.52):
In Reply to: 8 volt battery posted by 53dc on January 20, 2010 at 05:18:39:
First of all a small M should start and work fine at 6 volts if it has a good heavy battery and 0 or 00 Gauge battery n starter n ground cables.
Next, it wont do much harm other then the points will burn up a bit sooner,,,,,,,the lights will be plenty bright but likewise may burn up a bit sooner,,,,,,,the coil will run slightly warmer (unless you add some external ballast)
CHARGING ISSUES: The M originally DID NOT USE A VOLTAGE REGULATOR.....but a 2 wire (Bat Gen) Cutout Relay soooooooooo theres no Voltage Regulator to adjust... But yours may have been modified????????????????
The M originally regulated the rate of charge (via the light switch) by adjusting the gennys Field current by adding a small resistance to the Field windings when in Low charge but dead grounded the Field when in High charge or lights were on.
A genny dont necessarily know what its voltage is supposed to be, its increased if you turn it faster or increase its field current. You can charge an 8 volt battery with your existing genny but it may not charge at a real high rate.
I would make sure to install it at the same polarity which was originaly POSITIVE GROUND and for safety Id polarize the genny then see what happens???????? If she charges positive at higher RPM Id just run it a while n see how she does WITH NO CUTOUT RELAY OR GENNY CHANGES. However if she doesnt charge satisfactorily it may be possible to make some minor modifications such as but not limited to adjusting the third brush for a higher charge IFFFFFFFFFFFFFF it has a 3 brush genny.
Hook it up at the correct polarity (original Positive ground) Polarize the genny,,,,,,,,,see what happens is what I would do and then if necessary look into any third brush adjustemtns (if its a 3 brush genny) or other tweaks IFFFFFFFFFFF necessary.
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