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MAINTENANCE MANUAL
BRP-Powertrain
Effectivity: 914 Series
Edition 2 / Rev. 0
12-20-00
page 49
January 01/2010
12.5) Idle speed adjustment
General note
.
Idle adjustment
Always carry out idle speed adjustment when the engine is warm.
- Basic adjustment of the idle speed is first effected using the idle speed
adjustment screw (2) of the throttle valve.
See chap. 12-20-00 section:
Optimizing en-
gine running
Necessary only if not taken care of at synchronization.
WARNUNG
NOTICE
If satisfactory idle speed adjustment cannot be
achieved, inspection of the idle jet or additional pneu-
matic synchronization will be necessary.
See chap. 12-20-00 section:
Step
Procedure
1
Close idle mixture screw (4) by turning clockwise to screw in fully and then
opening again by 1.5 turns counter clockwise.
2
Starting from this basic adjustment, the idle mixture screw (4) is turned until
the highest idle speed is reached.
3
The optimum setting is the middle between the two positions at which an rpm.
drop is noticed.
4
Then readjustment of the idle speed is carried out using the idle speed adjust-
ment screw (2) and if necessary, by slightly turning the idle mixture screw
again.
NOTES:
Turning the idle mixture control screw in clockwise direction
results in a leaner mixture and turning counter clockwise in
a richer mixture.
Summary of Contents for 914 series
Page 183: ......