This is what I found in the '75 manual - if it uses screws they're Nr. 3 Philips, undo them and pull the handle out; maybe all it needs is greasing. There's a possibility that the stator plate under the flywheel is stiff/seized only way to find out is to try and rotate it.
I had an old distributor with the same problems so I removed the grommet and dug out the epoxy? and found the terminals - I used a dremel tool with a round tip.
Take the cowling off and check the movement (not running) of the throttle arm from idle stop to full. At idle (N) the arm should be on the stop - at full the arm should hit the throttle stop. Adjust the barrel in the anchor to pull the arm to idle stop.
Maybe you should grease the box if it has...
It's turning over it's just not starting, is this the method you're using?
you have to push and hold the choke button.
A quick check to see if it's getting fuel is to tilt it all the way up and pump ball - gas should run out of the carbs.
