ORIGINAL: terryscustom
Wondering if anyone else has ever had this...... I have a DLE 55 in a plane and have been flying in wonderfully. It has very little burble and runs great. The curious part is that if I find the right spot on the throttle where it has a little burble, then flip the plane inverted, the burble stops completely and it purrrrrs like a kitten.
Any of the pro's care to lend a thought?? My other 55's have no burble at all. Thought maybe the input on this may also help some of the guy's trying to tune their 30's.
Thanks!
It's the lever height adjustment. When the plane is upright the diaphram is up also which means the fuel that is in the cavity is being pulled thru the engine with vaccume from the venturi and assisted by gravity, when inverted the the engine has more work to do to pull the same amount of fuel thru because gravity is now working aginst you-thus the engine will run a little leaner. Adjust the lever height up a little at a time and test it you will see the difference.