I've owned several two cylinder hand starters AND EACH STARTED A BIT DIFFERENT, here is what mostly worked best for me ......
1) Start Impulse timing has to be right at TDC if too fast she kicks back if too slow harder to start
2) Usually I like the throttle set at slow idle, not open much.
3) DEPENDING ON TEMPERATURE I may try full choke but not over a coupe cranks after
which I open it maybe half
4) I like to try to start on number 1 so its only 180 later before 2 fires.......If you start n 2 its longer before 1 tries to fire...
5) I like to get No 1 on top of its exhaust stroke (ready to go down and suck in fuel) ,,,,,,,,,,,spin fairly fast for a good vacuum to draw in gas,,,,,,,not wait for gas to evaporate, dont let flywheel spring roll backwards,,,,,,,lay it over on compression SO SHE STARTS
The carb and mag and start timing have to be in tip top shape,,,,,dont over choke and wet gas foul the plugs,,,,,,,,have good clean carbon free as possible plugs
Im sure different tractors behave different and different folks have other methods, this is ONLY what worked best for MY tractors
John T