6-volt check

Your battery may seem to be okay sitting and not in use showing 6.3V. The real test is when you put a load to it with a load tester. You could purchase one at an auto parts store for 6 & 12 volt battery testing, or go to a local gas station that does repair work and they could probably do a load test on it for you. A good fully charged 6V battery shouldn't drop more than 1-1.5 volts with around a 10 amp draw or so. If she starts to dump quick, the battery is probably getting weak, and eventually will need replacing. Always make sure the battery is fully charged before testing. A battery that doesn't have full reserve could give you a false reading. You wouldn't want to throw out a perfectly good battery.... Steve

A good 6 volt will show something more than 6 volts, but I'm not sure of the reading. Usually the old 6 volt generators were set up to charge the battery to 7.2 to 7.3 volts - much like a 12 volt system today charges at 14.4 volts or so. Run the tractor for a while and then check the voltage - if it's at the 6.3 volt figure you mention while running then the battery obviously won't show any more than that.