It seems each of these engines has their own starting quirks! Here is my starting procedure..starting from cold;
1) full choke, ign off
2) flip prop CCW about 10X
3) ign on, starts on first flip
4) as soon as it starts, slowly open the choke
5) advance throttle and see how it transitions...generally no problems.
6) good to go!

I found that it was hard to start the 2nd time if I killed it with choke, so now I kill it w/ ign and repeat the same procedure as above, except I flip the prop about 4-5X rather than 10.
Works for my engine