If it only runs on choke the mixture screw is set to lean try a 1/2 turn
out, counter clock, for a start. Set it by getting it to rev-run as fast
as it will by adjusting the screw, then remove the choke and keep
adjusting till it runs best, then back off a bit. You are probably
flooding it on restart, pull the plug to see. it should run on 32-1
fine.