Man I sure hope someone can help! I got a used Enya 45 CX Model 6201 that the man said ran perfect 6 months ago before he stored it in a bag. Anyway, it was completely clogged and would not take prime. I spent a couple hours with a turkey baster and fuel tubing to open the needle valve and I took out the idle mixture screw. I've got good priming and it'll start right up. It has a nice low idle for as long as I want, has great top end with high speed needle out 1 1/4 turn, but dies when going from idle to high speed quickly. I'm thinking maybe I should have left the idle mixture screw alone but it's too late. The engine is on a test stand and I am letting it cool down and just backed the idle mix screw out 1/2 turn thinking it might be too lean. I don't know?
I'm running 10% CoolPower and an OS #8plug with 11 x 6 MAS.
THIS CRAP ENDS TODAY!!!!!!
Any ideas are greatly appreciated
Glow two-strokes that are tuned to be powerful at high speed are often stumblers when the throttle barrel is jammed open. Everyone used to know that, but that was back before 3D and Fun Flying were popular. One of the reasons that four-strokes became so popular was their ability to accelerate rapidly without stumbling, when compared to the average two-stroke glow engine.
So, what am I saying? Your expectations are out of line and your prop is too big. The Enya .45CX will pull 11x6, 12x5-6 props easily, but its true nature won't be realized until you drop down to a 10x6 prop and tune it up for max rpm, minus a couple of hundred rpm off the top. In fact, being an AAC piston/liner equipped engine, it likes to run a tad leaner than ABC or ABN engines. Don't be afraid to let it spin up. That is what it was designed to do. Not only that, but instead of fading (sagging) from going lean in the climb, this little rascal is designed to keep on chugging uphill without overheating.
As you may have gathered, the Enya .45CX would not be my first choice for an engine to fly 3D, although it does do well at Fun Flying if you learn to compensate for its characteristics.
If, after all of this, you still do not like this engine, and it happens, put it in a box and send it to me along with your address. I'll send you a brand new, never used, NIB ASP or Magnum .52 two-stroke, or an ASP .61 four-stroke, new, never ran, in return. I love the AAC Enya CX engines that were produced in the mid eighties. I have close to a dozen now.