Rotax 914 series Maintenance 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 914 series Specifications

General

Bore	79.5 mm
Stroke	61 mm
Compression Ratio	9.0:1
Cooling System	Liquid-cooled cylinder heads, air-cooled cylinders
Redline	5800 rpm
Engine Type	4-cylinder, 4-stroke
Fuel Type	Avgas 100LL
Oil System	Dry sump
Fuel System	fuel injection
TBO (Time Between Overhauls)	2000 hours
Displacement	1.211 liters (1211 cc)
Power Output	84.6 kW (115 hp) at 5, 800 rpm