Rev Counter Drive - Rotax MMH-912 Series Maintenance Manual

3.8)

Rev counter drive

See Figs. 72-17, 72-18 and 72-19.
The optional mechanical rev counter (1) is driven via the worm gear pressed into
the camshaft.
◆ NOTE:
◆ NOTE:
Remove allen screw M5x16 (2) and the lock washer, and pull the rev counter
housing (3) along with the O-ring (4) and the rev counter shaft (5) out of the
ignition housing (see 72-00-00 sec. 3.4).
Gear-tooth system (6) and square end (7) of the rev counter shaft must be
inspected for damage. If there is oil leakage, replace the shaft seal (8) 6x11x3
and O-ring (4). Press new shaft seal fully home in the rev counter housing (3)
using punch, part no. 877680 .
Fig. 72-17
Fig. 72-18
8
2
Effectivity 912/914 Series
Edition 1 / Rev. 0
BRP-Rotax
Maintenance Manual
On older engine versions without a mechanical rev counter, a
cover plate is fitted in place of the rev counter housing. The
engine can be retrofitted with a rev counter drive by installation
of the drive shaft. See Fig. 72-18.
On new engine versions, the ignition cover must also be replaced
and the worm gear (9) pressed into the camshaft using special
tool, part no. 877190.
00241
4
3
1
7 5
Fig. 72-19
9
00242
6
00243
72-00-00
page 21
May 01/2007