Rotax 912 Series Maintenance Manual page 255

Effectivity 912/914 Series
Edition 1 / Rev. 0
BRP-Rotax
Maintenance Manual
◆ NOTE:
The different ignition points (only on 914 Series) for the
top spark plugs and the bottom spark plugs takes into
account the differing ignition delays, preventing pre-
ignition and detonation.
The difference in the ignition points is achieved by
different lengths of the trigger cam (1) on the fly wheel
hub.
Trigger cam for ignition circuit A (raised position) is
approx. 4 mm (0.16") longer.
Fig. 74-4
1
B3/4
A1/2
00135
74-00-00
page 7
May 01/2007