Hi all
A friend of mine recently bought a slightly used 140 DZ. After being a little fuzzy to start initially, it finally came to life. Ran it a couple of tanks with 15%nitro before we changed fuel to 20% for a little more power.
The engine seemed to work ok, but today it started to act up. It will idle fine, but when you advance the throttle it sounds like it is loading up, and it stops with a bang. Same thing happens regardless of needle settings. We do not have very much experience with the YS engines, so a little help on this one would be most appreciated.



Steinar