Jim: I have a Super A 6 volt and 130 and 140 both 12 volt. All three tractors have alternators. Also on all three tractors I have a push button type switch for energizing the alternator. Everyone of my tractors had an extra wire in the harness that wasn't going to be used for anything, when I changed them from generators to alternators. I drilled a hole on dash just under the fuse holder for lights, and that hole is for push buttom switch. Sometimes my tractors energize the alternator on their own, if they don't it is one quick push of the button. I have 12 volt coils on 130 and 140. I don't have to bother with diodes, resistors, lights, etc. The Super A on 6 volt is now into its 11th year with the same battery, alternator, etc. I live in Canada and see lots of cold weather starts. These setups are just about as trouble free as they come. I can also tell you if it weren't for a couple of 12 volt motors I have, these tractors would all have 6 volt alternators. If 3 guys went in my shop at -20F temp, and each one started a tractor, the guy on the Super A would be going first.
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