Rotax 914 series Maintenance Manual

BRP-Rotax
Maintenance Manual
Effectivity 912/914 Series
Edition 1 / Rev. 0
72-00-00
page 67
May 01/2007
d02622
3.11.6) Valve springs
See Figs. 72-71 and 72-72.
Carry out a visual inspection of the valve springs for damage and wear.
Depending on engine version, dual or single valve spring configurations
are planned. However, dual and single valve springs must not be used
on the same engine.
◆ NOTE: The valve springs can be distinguished by the different
wire thickness and the different spring strength.
The springs for inlet and outlet are equivalent and sym-
metrical.
Dual valve spring configuration:
– Inner valve spring (1) 2.3 mm (0.09 in)
– Outer valve spring (2) 3.5 mm (0.14 in)
Single valve spring configuration:
– Single valve spring (3) 3.85 mm (0.15 in)
07414
Fig. 72-71
4
3
5
1
2

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