Rotax 582 and 532 CARBURETOR
AIR VENT TUBE
Kitfox™ Owners Equipped with Rotax 582 and 532
Denney Aerocraft Company
have been several incidents reported to Denney Aerocraft, where the
above mentioned two-cycle engines have “seized” during normal
operation. Our investigations revealed that the carburetor Air Vent
Lines were ‘T’d” together into a longer tube and vented out the
bottom of the cowling. The longer tube, especially when vented out into
the prop-wash changes the air pressure inside the carburetor causing it
to run excessively lean. This can cause the engine to seize.
Aerocraft recommends that you leave these vent tubes as they come from
the Rotax Factory. We have not experienced any fuel dripping or leaking
from these factory supplied vent lines. These Vent Lines are not fuel
overflow tubes. If fuel is leaking out through them, then there is a
NOTE: IF YOUR FAA INSPECTOR REQUIRES YOU TO VENT THESE LINES TO THE OUTSIDE. PLEASE HAVE THE INSPECTOR CALL DENNEY AEROCRAFT’S TECHNICAL SERVICE DEPARTMENT.