Rotax MMH-912 Series User Manual

BRP-Powertrain
Maintenance Manual
72-00-00
page 24B
October 01/2010
Effectivity 912/914 Series
Edition 1 / Rev. 3
d04776
■ CAUTION: The value can be positive or negative.
(I) For smoother removal of the piston stopper turn the piston slightely away from
the piston stopper.
(J) Repeat this procedure for cylinder 3. The piston will be stopped at 180°.
(K) Read the difference to 180° from the protractor.
■ CAUTION: The value can be positive or negative.
(L) Repeat this procedure for cylinder 4. The piston will be stopped at 180°.
(M) Read the difference to 180° from the protractor.
■ CAUTION: The value can be positive or negative.
■ CAUTION: If a value exceeds the GB20 limit, then the engine needs to be
overhauled by a ROTAX-authorised service partner.
■ CAUTION: The deviation of the crank pin (as a whole) must not exceed the
GB20 value. For GB20 see also Chapter 4 “wear limits”.
Example showing the results from meassuring a crankshaft, where the GB20
threshold is not exceeded:
1
2
3
4
+1°
+ 2°
0°
Cylinder deviation
0°
08690
Fig. 72-21/3

Rotax MMH-912 Series Specifications

General

Brand	Rotax
Model	MMH-912 Series
Category	Engine
Language	English