Well here's what happened tonight in the backyard: Got to a good high speed mixture with 45 degrees up, got a good reliable idle, smooth acceleration up to full throttle from idle. And the only issue was when I let it idle for a full minute or more, then gave throttle, still tended to die. Methinks in the air, this would not be an issue because you would never fly at idle for over a full minute, and this is the only problem I had. On the other hand, just wondering if it should be fully reliable at any throttle condition. I read the manual I found online for a Magnum
XLS, and it actually stated that after a long a idle a hesitatation or deadstick would be normal if you give it full thrust suddenly. This is actually an older Magnum GPA, not XLS, and I can't find a manual for it online, but I'm wondering if the principles are the same. This engine does not have the remote needle valve.