Hard To Turn Over - Rotax MML-912 Maintenance Manual

3.9)

Hard to turn over

See
General note
Carry out inspection only on cold engine and before 1
Inspection
Step
1
2
3
4
Measuring torque required to turn crank drive
Graphic
Fig. 6
Effectivity: 912 Series
Edition 2 / Rev. 0
BRP-Powertrain
MAINTENANCE MANUAL
Fig. 6.
Risk of electric shock!
WARNING WARNUNG
Ignition "OFF" and system grounded! Disconnect neg-
ative terminal of aircraft battery.
Engine runs sluggishly
Remove spark plug connector and remove 1 spark plug from each cylin-
der.
Torque must be determined with a suitable jig.
To do this, determine the maximum occurring torque on the propeller shaft
necessary to move the whole crank drive.
The torque must be max. 150 Nm (110.64 ft.lb).
Carry out detailed inspection of the affected gearbox components.
Carry out detailed inspection of crank drive.
Länge L (m) /
length L in m
Kraft F in N /
force F in N
st
start.
Procedure
05-50-00
05694
page 20
October 01/2009