Hi Dave
I was just reading the messages concerning the YS-110 and have noticed that my problem seems to be somehow well known.

Last year I bought a Synergy 110 from Braeckmann, my selected engine is the YS-110, prop is 15x8, fuel is 20/25. I went through your setting instructions several times, but I did not manage to adjust the engine correctly. High speed settings are ok. The transition from low to high speed seems to be ok, however I have difficulties to notice if the engine runs too lean or to rich. But my main problem is the idle and low speed behavour: Letting run the engine for about 20 seconds in idle or low speed, the engine just dies. Sometimes I can keep it running when "playing" a liitle with the throttle stick. During the last 8 months I was facing this problem all the tie. I have been trying to adjust the settings for hours, beginning again at the original settings several times, but I never managed to get a good running engine. Whenever I fly (with a quite uncomfortable feeling), the engine generally dies latest during landing approach, because then it needs to run on idle for some time. Aerobatic manoevres with idle over some time are not possible.

Can you give me some advice what I might have to change? Whats about the new plunger? I read several times that people with similar problems had to install a new, modified plunger.

Thanks for your help

Pascal