Husqvarna TC 50 2023, Owner'S Manual

Page: 109 / 196

TUNING THE ENGINE 15
107
15.5 Carburetor - adjusting the idle speed (TC 50)
K01224-10
–
Screw in idle air adjusting screw
2
all the way and turn it to
the specified basic setting.
Guideline
Idle air adjusting screw
Open 3 turns
–
Run the engine until warm.
Guideline
Warming-up phase
≥
5 min
–
Connect the special tool.
Tachometer (45129075000)
Danger
Danger of poisoning
Exhaust gases are toxic and
inhaling them may result in unconsciousness and
death.
–
Always make sure there is sufficient ventilation
when running the engine.
–
Use effective exhaust extraction when starting or
running the engine in an enclosed space.
–
Adjust the idle speed using idle speed adjusting screw
1
.
Guideline
Choke function deactivated
–
The choke lever is pushed in
to the stop. ( p. 17)
Idle speed 1,400 … 1,500 rpm
–
Turn idle air adjusting screw
2
slowly in a clockwise direc-
tion until the idle speed begins to fall.
–
Note the position and turn the idle air adjusting screw slowly
counterclockwise until the idle speed again begins to fall.
–
Adjust to the point between these two positions with the
highest idle speed.
Info
If there is a big engine speed rise, reduce the idle
speed to a normal level and repeat the above steps.
If the procedure described here does not lead to sat-
isfactory results, the cause may be a wrongly dimen-
sioned idling jet.
If you can turn the idle air adjusting screw to the end
without any change of engine speed, mount a smaller
idling jet.
After changing the idling jet, start from the beginning
with the adjusting steps.
Following extreme air temperature or altitude changes,
adjust the idle speed again.