Originally Posted by jeffie8696

Good advise about the low speed spring on the .45, I will see if I can tweak the control rod to apply some pressure at idle and pull the rotor out some to keep it consistent. I will keep an open mind about it.
I still think the .62 has a main bearing that isn't seated and when the case heats up during flight it causes enough drag to make it die at less than full throttle but not enough to make it die at full throttle. I don't believe it is fuel system related , not when I can install the .45 in its place and it runs perfectly.
I called Horizon but they were unaware of any particular conditions to the .62 that would cause it.