the factory setting might be off a little. or the settings in the manual might be wrong.
i had the same with my pro 12 engine. wouldnt start with factory/manual setting.
first close the hsn fully, then open it 3 turns. (this is the point where most engines wil start) try to start it. it if it does, open the needle more. so you wil be running a little rich for break in.
and again also check your glow starter. you can do this by manually plug in a glow plug. if it lights up then its ago.