Oh, seems I'm not the only one lucky with the evo 46 here
Yes, I got exactly the same problem. Drove me crazy[>:]
I bought a brand new evo 46 with all rc stuff and being a beginner, I spent several weeks between posting threats here, checking all sort of things in my plane even based on the evo customes service suggestions (tank, lines, needles, glow plug, fuel type, you name it) and going to the field to see my plane with the same problem, over and over, dead stick, until I get sick tired of this engine and send it back to Horizon Hobbies for repair or my money back.
I just got the engine back from then today. Didn't test it yet, but as far as I know, they said they replaced the carb.
Will test it probably next weeked. Hope it works good.

Dispite many say this engine is the better ever, I didn't approve their quality control process and wouldn't buy another.

If yours is still under awarranty, sent it to then.

Nilo