Hi Mars

Sorry to hear you crashed you Roo! Air is normally the major cause of flame-outs. Check all the fuel pipes and as a few have said, some sort of air trap is required in your installation. Obviously it is puzzleingt that you had 50 trouble free flights before that. Pump voltage, interference, etc are really low possibilities.

Remember that your pump is sucking big time at full throttle and any little air leak will be disaterous. Sometime filler valves can also cause air in the system.

Good luck

Zane