Rotax 912 i Series Installation Manual page 42

The y-axis must be perpendicular to the longitudinal axis of the aircraft.
Vertical axis
Permissible deviation from perpendicular: ±10°
Fig. 7
Effectivity: 912 i Series
Edition 1/Rev. 0
BRP-Powertrain
INSTALLATION MANUAL
10-10-00
Page 12
January 01/2012