Rotax 912 Series Service Manual

BRP-Rotax
Maintenance Manual
72-00-00
page 68
May 01/2007
Effectivity 912/914 Series
Edition 1 / Rev. 0
d02622
To check the spring force, apply a test load (F) (test weight set assy.
part no. 976995) and measure the remaining spring length VT04
(measuring fixture part no. 976210). See Fig. 72-72.
Test load for dual valve spring configuration:
– Test load (F) for inner spring 53 N (11.91 lbf)
– Test load (F) for outer 133 N (29.80 lbf)
Test load for single valve spring configuration:
– Single valve spring 200 N (45 lbf)
■ CAUTION: Replace valves shorter than the minimum length.
◆ NOTE: The spring length should be as equal as possible on the
inlet and outlet sides (max 0.4 mm (0.016 in.) in
difference), otherwise replace the springs.
See 72-00-00 sec. 4.
F
VT04
07425
Fig 72-72

Rotax 912 Series Specifications

General

Redline	5800 rpm
TBO	2000 hours
Displacement	1211 cc
Bore	79.5 mm
Stroke	61 mm
Power Output	80 hp (59.6 kW)
Compression Ratio	9.0:1
Fuel Type	Avgas 100LL
Ignition System	Dual electronic ignition
Fuel System	Fuel Injected
Oil System	Dry sump
Engine Type	4-cylinder, horizontally opposed, 4-stroke