Side issue,

For years it has had an intermittent starter issue. When turning the key you can hear the solenoid but starter won't start. So you keep turning key off and on and it will eventually start. I don't recall it being too bad, but I have burned through 2 ignition switches, to the point I just left the wires hanging out and would twist them together when needed (Idont use the forklift that much) I assumed the starter solenoid was bad

Since I had this fuel issue I decided to replace the starter and ignition switch while I'm at it.

Starter came in and I replaced, Teeth looked fine on the flywheel. It does the same thing. I have messed with the gear selector to make sure I'm in neutral. When its not in Neutral the starter won't even click so I know I am actually in Neutral when this is happening. I have semi traced the start wire down and I don't see it going to any other solenoids, sensors etc. When I jumper the starter right at the starter it seems to be OK.

Any clues? Maybe voltage drop? When I am hot-wiring it and it does it, I can feel the wires getting hotter like its pulling a lot of current?

In my Hot wire scenario I am only using 3 of the 4 wires on the ignition switch harness. Any idea what the 4th wire goes to?