Stihl HT 73 Instruction Manual - Page 28

Motor Management, Adjusting the Carburetor, Standard setting, Adjusting idle speed

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380BA008 KN 380BA013 KN Motor Management Adjusting the Carburetor english / USA Exhaust emissions are controlled by the design of the fundamental engine parameters and components (e.g. carburation, ignition, timing and valve or port timing) without the addition of any major hardware. LA : Back off the idle speed screw (LA) counterclockwise until the end of the screw (see arrow) just disappears. Then turn the screw 6 full turns clockwise. The carburetor is set at the factory to provide an optimum fuel-air mixture under all operating conditions. Standard setting : Check chain tension. : Check air filter and install a new one if necessary. : Check spark arresting screen and clean or replace as necessary. Adjusting idle speed : Carry out stardard setting. : Start and warm up the engine. HT 73 27

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27
HT 73
english / USA
Exhaust emissions are controlled by the
design of the fundamental engine
parameters and components (e.g.
carburation, ignition, timing and valve or
port timing) without the addition of any
major hardware.
The carburetor is set at the factory to
provide an optimum fuel-air mixture
under all operating conditions.
Standard setting
:
Check chain tension.
:
Check air filter and install a new one
if necessary.
:
Check spark arresting screen and
clean or replace as necessary.
:
Back off the idle speed screw
(LA)
counterclockwise until the end of
the screw (see arrow) just
disappears. Then turn the screw
6
full turns clockwise.
Adjusting idle speed
:
Carry out stardard setting.
:
Start and warm up the engine.
Motor Management
Adjusting the Carburetor
LA
380BA008 KN
380BA013 KN