Tad:- I managed to start the engine and rev up above 50%. It was about to take off until when the tail rudder about to spin to the right. I think there's still some zeroing i need to do. Just play with the throttle to run-up the engine.

I shut the engine by closing the throttle fully thru the trim and i understand that i should let the engine cool of a bit for refuelling. After refuelling, i couldn't start the engine as per normal. Even when it managed to start, it just goes dead..about a couple of times. I reckon that the fuel was too rich, but i took out the plug to de-flood it....but its still the same. Should i open the throttle needle fully just like the first time? Cos i did some tuning to the needle and throttle adjustment valve.