Starting my 1956 John Deere 420c, I didnt have the light switch set correctly and that is what I turned to get it to fire. To me it sounds as if it is only running on one cylinder. I have to go through the carb again, it still isn't idling correctly. Batteries went out and camera shut off when I tried to idle it.
John Deere, 420c, antique tractor, crawler, dozer, bulldozer, johnny popper, startup, old iron, engine start