I have a new OS 120 III with pump mounted inverted on new GP Ryan STA. Engine cranks/runs well on ground in the air any sudden movement causing G force; snap roll, spin etc. it dies and smokes like it rich after clearing it throat back to running normal. Last Sunday it happened. Just after take off I banked and pulled a hard right turn; total shut down! Got her back to the runway at the cost of 2 smashed wheel pants and bent axle. This engine has 2 tanks break-in per instructions and about 10 flights. HELP! I hate to destroy my Ryan because of a new engine flame out. I am running Sig 10%, 20% oil, OS F type plug, Fuel filter, vented tank, 90 degree OS header, 6 inch extention with 45 degree turn down. I tuned 1/4 turn rich from max setting because of cowled engine, don't want to over heat. Any suggestions? This thing has about got my goat! How do you set this engine up?

Thanks guys,

BobHH