Durk: Probably just as well you raised this. I do have all 4 wiring diagrams in the history of the 140, and you caused me to look again. The starting went from pull rod with starter switch on starter, to your type with starter switch in dash, and the key start with solinoid. That solinoid is not on starter. Diagram is not clear but it looks like it's between battery and starter.
Prior to serial number 26800 they were all 6 volt postive ground same as 100 and 130. After that it was 12 volt all the way. 26801 to 45000 is same as yours. 45001 to 57723 has key start with solinoid ( IH are calling it a magnetic switch) Four way flashers were added in these. 57724 and above have alternator, quite a bit of dash change, plus they have a neutral starting switch. I presume tractor has to be in neutral to start, as a wire runs from that switch in the gear shift area to the key start. It's in same harness with rear lights.
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