This is just a little FYI. I have a Mintor 22 that I bought a year ago and flew on a RedwingRC profile. By the end of the summer the engine started having some issues. It would run part of a flight and then just quit, eventually it wouldn't start and continue to run. In the fall, I sent the engine to Top Dawg for a checkup and service and they returned it saying that it started & ran great. I mounted the engine and found it still wouldn't run for me. It would fire (pop) but not continue to run.

A 10 hour drive to Toledo and back gave me a chance to think about why the engine would run for TopDawg but not for me and the answer had to be the ignition battery. When I got home, I replaced the 4 cell NiCd pack measuring 5.1 volts with a 5 cell pack and the engine immediately became friendly again The Mintor 22 starts, runs and transitions good, and I'm now a happy customer again.

Since the ignition unit says 4.8 to 8.4 volts, I just had not considered the possibility that 5.1 volts was not enough to make it run.