Rotax 912 Series Service Manual

BRP-Rotax
Maintenance Manual
Effectivity 912/914 Series
Edition 1 / Rev. 0
72-00-00
page 63
May 01/2007
d02622
3.11.4) Valve seats
See Fig. 72-66.
Carry out a visual inspection of the valve faces for damage and wear.
Apply engineers blue evenly to the valve faces and fit the valves into the
respective valve guides. Turn the valve under gentle pressure to
produce a clear imprint of the sealing surface on the valve seat ring.
Ensure that the sealing surface of the valve seats (1) is clean and if
necessary, regrind with valve lapping paste.
■ CAUTION: The annular imprint on the valve face must be a
continuous, unbroken ring.
The width of the imprint corresponds to the width of the
valve seat CH02.
■ CAUTION: If burned spots or deformation are detected, send the
cylinder head to a ROTAX authorized overhaul facility
for overhaul.
See 72-00-00 sec. 4.
Maß
dim.
45°
00285
CH02
1
Fig. 72-66

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