Hi,

I am having problems with my YS110. It runs well at all throttle settings except idle (2500 to 3000 RPM). At this RPM, it runs for about 10 seconds and then quits. It does not speed up or slow down before dying - it just quits. I have leaned and richened the idle mixture and the regulator but can still not get it to work. It was sent in to YS for servicing and had a number of things changed including the piston ring but I am still having the same problem. The fuel system is not leaking as far as I can tell and I have tried 2 new OS Type F glowplugs. The engine is mounted inverted and has never been in a crash. It was running perfectly in the same airplane for 2 years until the past couple of months.

Any ideas?

Thanks.