I have a relatively "new" engine (run only about a gallon 'till now" that was resting in a box for app. 3 years.
Trying to bench-run it I found out that the engine will start only at WOT position, and will cut-off immediately when lowering the throttle below WOT.
Main needle valve was set to 4 full turns, and the mixture control valve was opened 2.5 to 3 turns.
Fuel level was at carb centerline and fuel was 15% Omega 4 cycle fuel

Help!

Any response will be more than appreciated

Thanks in advance

Yaron