RE: Evolution engine
You have to remember:
- The Evolution is sold as not requiring adjustment beyond the set screws.
- The problem (for me) was not that the limiter was holding the needle (I did loosen it) from turning, but rather that the collar prevented the needle from moving INWARDS even with the set screw loosened. Only removing the collar altogether finally solved this.
In other words the needle acted as if it had bottomed out because of the collar.
- I spent so much time trying to dial it in because of the previous, as it would always seem that I had bottomed out the idle screw when it wasn't even close.
- There were no problems vis-a-vis tank position with my setup although it was suggested as a possiblity.
- The instructions are normally considered "gospel". Going outside of what they say is often touted as a means to void any warrantees or guarantees. Not that you are wrong or anything, but Evolution makes it out that these engines are preadjusted.
IMHO the limiters are worthless.