Hi Troy, thanks for your last answer.

The other day I had two dead sticks with my 160 DZ, after two successfull flights. In the morning the engine was running ok but very rich, mixture setting was 2 - 2 1/4 turns from fully closed. The two dead sticks happened in the afternoon when the temperature was higher, when engine was running at middle throttle it was ok as I pushed the stick at full throttle I noticed lots of smoke and a significant drop in RPM, then I had the flame out. Anyway, I was suggested to run it leaner about 1 3/4 from full closed. What do you think? The engine has about 5-6 tanks, I still try to break it in. The only issue I face is that even I run the engine very rich when I land is hot I can touch it but not for very long as with my other YS engines. I have checked the cowl openings both for inflow and outflow and the seem to be ok, their area analogy is about 1 to 3.

Final question, I have put a non return valve to the air vent of the tank and have attached some fuel tube to it. Both the NRV and the tube are inside the fuselage. Is that ok or I should open a hole on the fuselage and pass the fuel tube outside so that it "breathes" better?

Looking forward to your answers,

Thanks and regards,

Nikos