In Reply to: 8n issues (6V, front mounted distributor) posted by Tony on May 16, 2020 at 08:27:56:
Starters of that vintage used a bushing in the rear. Those had a habit of wearing out and letting the armature drag. Takes a LOT of power to turn a dragging armature. At that time you could buy a new backing plate with brushes installed. Made for an easy repair but they are no longer available as far as I know.
On a 2N and I suspect the 8N also, you can hold a quarter across the terminals of the ballast resistor instead of installing a jumper.
The tractor was designed for 6 volts. Fix the problem and you won't have to go to the expense of converting it.
The very late 8N's came with a tachometer. You would either have to make a hanger or get a dash panel from a late 8N. I don't know where they connected the cable. If you can locate a electronic tach it would be easier to connect.