Not a lot goes wrong with a carb in general, most cases it is not properly set up and adjusted, the float may be set too high or not high eneough, your fuel/air mix screw may not be correct..black deposits on the plugs signals too rich a mixture, perhaps from being choked but the carb needs to be adjusted and ensure the float is not sticking..you most likely do not need a new carb but you definately need to go through the carb according to your manual..I have a CA Allis manual around here somewhere but it could take some time to find it..hopefully someone here or on the Allis Chalmers board will post some info for you.
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Today's Featured Article - Converting from 6 Volt to 12 Volt - by Chris Pratt. It's a common problem for old machines especially when the weather starts to dip below 40 and the tractor isn't fired up as often. You are probably used to the 12 volt Diehard, charged with 200 amp alternator of your 3/4 ton that always is ready and always starts. It's this type of experience that brings about the many queries we get for 12-volt conversion kits. Since only a few kits are available (we sell kits for the
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