Hello

my setup : dz160 ,18.1x10 prop, cool power 30% fuel.

Description of the problem:
After a year of not Problems Flights , Yesterday I flew a my Seniors series,
At the end of the series, after about 6- 7 minutes There is a vertical climbing.
Twice I got exactly in this Climb Stop engine.
After landing, I saw that in the fuel tank There are about 1/4 tank fuel (no fuel problem)
I checked the fuel line in the tank and it look good (I use the special ys clunk )
Do you have any ideas for this issue ?

Thanks
kobi

Did you change the hose inside the tank?

Hi apereira
No I'm not switched the hose in the tank
I just checked it and it looks good
I also checked it under pressure and no air leakage

Did you remove the hose and check it? The hose in the tank could have a hole just above the fuel level in a vertical climb. That would result in "sucking" air. It doesn't matter if the tank holds pressure or not. If that looks good maybe a piece of junk made it's way into the fuel regulator or carb causing a slightly lean condition killing the motor?????

Ken

Hi Ken
I checked the hose in the tank under pressure and no air leakage
I checked the all fuel sestem and no junk
I'm thinking to replacing the regulator diaphram

Does it happens after 7 minutes? if you climb like that on the first 5 min does it fails? change the hose and the YS clunk first.

Regards