My Dad purchased an older mid-40 (?) Allis Chalmers Model C. The last owner's dad had it garaged for several decades. He got it running just to sell it. Supposedly the seller put all new points, plugs, rotor, etc into it. I've looked at them and they all do look new. The generator doesn't work anymore, so he put a 12 volt battery (instead of 6 volt) on the tractor and ran a line from the positive post through a voltage reducer and then to the coil. The tractor ran fine; my dad liked it and bought it. The line to the voltage reducer (which is shoved into the positive post clamp) and the negative battery cable are always taken off when it is not running. Dad got it home and it sat for several weeks; now it won't start. It seemed to have lots of spark at all the plugs. I squirted WD-40 into the cylinders but it still would not start. Still thinking it was a fuel issue, I removed, cleaned and reinstalled the carb-taking care to 'lube' the float valve needle really good so it won't stick. Still nothing. Anyone got any ideas? Did the last owner screw something up for us by putting the voltage reducer on? Also is there anywhere online a person can download good manuals for free or reasonable purchase? Thanks. I'm lost for ideas now. :?