These Chonda engines seem to be subject to most of the same common problems as the real thing, with the addition that the too-light-gauge metal used in the throttle/governor brackets and levers greatly increases problems in this area.
So, have you checked that the choke is closing properly?
Cheers, Gadge
"ODK Mods can explain it to you, but they can't understand it for you..."
"Crazy can be medicated, ignorance can be educated - but there is no cure for stupid..."