I bought a PC-9 about 12 months ago, today I went to the airport to fly it. It has an O.S. LA .40, new 15% fuel, A3 O.S. glowplug, 25 ft. above sea level. I did some taxing, after about 2 or 3 minutes the engine would die out. This process continued for an hour. Is there something abnormal I need to know about this Seagull design, maybe something with the fuel tank location? I did eveything according to the manual.

Thanks for any help!