Andrew - From your description it sounds like you've got an H or an M? If so, the blown fuse in the ammeter box is unrelated to your starting problem. That fuse is for the headlights and nothing else. Instead here's several possibilities for your no start problem: 1 - Bad cable connection(s). Keep in mind even when a cable and terminals looks good from the outside, the wire under the insulation can be badly corroded or broken. 2 - Worn out starter switch. Sometimes you can squeeze a little more life out of the switch by cleaning up the contact bar and the mating terminal buttons inside the switch and on the starter. But for $10 or so it's best just to replace it. 3 - Bad starter - worn out brush, broken winding or an internal conductor strap breaking loose under the power terminal. Time for the starter to visit your local alternator shop. 4 - Starter drive has jammed into the ring gear. (This happens a lot on old Farmalls). Loosen the starter mounting bolts several turns each, then pull the starter away from the engine. If you get a noticable clunk when you first move the starter, retighten the mounting bolts and try the starter again. If the starter now works again figure on replacing the starter drive pinion (and possibly also the flywheel ring gear..) to prevent it from jamming again. Good luck!
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