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i HAVE A .46 MECOA HELI ENGINE , APPEARS TO BE BRAND NEW WILL START NO PROBLEM ON BENCH, BUT WON'T START IN MY RAVEN 50. ANY INSIGHT OR HAVE DEALT WITH THIS PROBLEM ?
If it starts on the test stand and not in the heli then something must be wrong withthe fuel system in the heli. try hooking up the test stand tank to the engine while it is in the heli.