The choke plate should allow the fresh gas to "slurp" upward with the airstream to get at least some into the engine. The hole in the choke plate helps a lot here. Important is that the valve closes well.
starting procedure:
with choke closed, and ignition on, set throttle trim to fast idle.
flip until engine burps and stops again
choke off
flip until engine starts, then return throttle to normal.
This also should work in inverted engines.