Ibrake....... Hmmmmm you got problems...... but simple problems.... Since the engine is not actually all the way broke in, that may cause problems, but not in a distinctive way.... the third question you answered yes to tells a lot, if it Allways seems to die out at a certain part or time in flight, ( in a usual pattern style fly) then its probably a setting problem, probably coupled by a pressure , or tank location problem.
Some more questions......
Is your plane a kit or a arf ........?
Have you made any custom modifications to make things fit, engine, fuel tank ect.....?
Is your engine side mounted or inverted or straight up......?
Are you running a stock muffler with a pressure fitting.....?
You are just running two lines from the tank arent you...?
Is there about the same amount of fuel in your tank when you deadstick in..?
How much fuel do you have in your tank when it dies...?
Have you tried filling the tank 1/4 full and starting and running it...?
Do you have excessive vibration or seem to...?
Is this one too many questions..?????? Captain Crash...