Update on Ignition Switch
The switch finally got bad enough to need to change it. It was causing the starter solenoid to just click or not work at all and the tractor would not stay running unless you got the key just right. I did not like the idea of cutting the harness but was tired of replacing swithces because of broken tumblers or melted parts in the NH plastic switch. So I purchased a NAPA KS6180 ($23) Ignition switch and then crimped, soldered, shrank wrapped and taped all splices and connections. See attached pictures.
I spliced a red #10 wire to the two NH red #14(NH connecter # B & D) and connected it to the Battery terminal on the new Switch(the 2 NH Red # 14 run back to a common positive battery splice per the wiring diagram). I spliced a White #10(I didn't have an Orange) to the NH #10 orange (NH Connector C) to the Ignition Terminal on the new switch and finally I spliced a white # 14 to the NH white #18 (NH connector #A) to the starter terminal on the new switch.
The tractor is running fine now hopefully with no other ignition switch problems. Terminal C was melted this time on the NH plastic switch along with a real loose tumblers(key would jamb), last time I think it was one of the two battery terminals #B I think don't remember for sure. The terminal looks real small for a #10 wire which probably caused it to heat up. Since the last switch was installed last May very little assessory usage was going on as we haven't needed lights or the heater during the summer months. The switch might be the cause of the problems others are having with electrical no start/hard start problems.
jml755: I was being conservative when I said "Started sometimes 2 or more times daily" the tractor is used daily in the day to day operation of taking care of 25 +/- horses and 47 +/- acres, to spread manure, mow, building and maintaining trails and jumps, snow removal etc. It is used more than the other three Fords (F6640, F5000, and F2110) we own. Sometimes it could be started as many as 20 to 30 times daily.
