AKCub
Registered User
Anchorage, Alaska
Been trying to track down a fuel leak for a few months on and off with my 160 hp cub.
It all started when I replaced my old carb with one from UNIVAIR. When running, fuel ends up on the gear and belly in little drops. I took the carb off and had a local shop look at it and they replaced the needle and seat and bench checked it and pronounced it OK. Now if I go out and fly for a couple of hours sightseeing I don't notice any fuel. If I go out and do touch and go's for even a little bit (3 or 4 trips round the patch at lake hood) I end up with dried gas on the belly. There isn't any fuel leaking static.
I can see where the gas is coming out of the carb air box and all the external connections to the carb are clean and dry so I "know" the bonus gas is coming from inside the carb. The only thing I can figure out is the fuel level in the float bowls is set too high and when the plane is pitched up on takeoff and landing the fuel ends up coming out of the carb. I haven't noticed any change in the engine temps or roughness during any of this....
Anybody ever run into this before? Any ideas about what is causing it? Can you recommend a great carb person in the Anchorage area?
Thanks in advance,
Scott
It all started when I replaced my old carb with one from UNIVAIR. When running, fuel ends up on the gear and belly in little drops. I took the carb off and had a local shop look at it and they replaced the needle and seat and bench checked it and pronounced it OK. Now if I go out and fly for a couple of hours sightseeing I don't notice any fuel. If I go out and do touch and go's for even a little bit (3 or 4 trips round the patch at lake hood) I end up with dried gas on the belly. There isn't any fuel leaking static.
I can see where the gas is coming out of the carb air box and all the external connections to the carb are clean and dry so I "know" the bonus gas is coming from inside the carb. The only thing I can figure out is the fuel level in the float bowls is set too high and when the plane is pitched up on takeoff and landing the fuel ends up coming out of the carb. I haven't noticed any change in the engine temps or roughness during any of this....
Anybody ever run into this before? Any ideas about what is causing it? Can you recommend a great carb person in the Anchorage area?
Thanks in advance,
Scott