Stihl MS 192 T Instruction Manual page 35

English
Standard setting
: Shut off the engine.
: Check the air filter and clean or
replace if necessary.
: Check the spark arresting screen* in
the muffler and clean or replace if
necessary.
: Turn the high speed screw (H)
counterclockwise as far as stop (no
more than 3/4 turn).
: Carefully screw the low speed
screw down onto its seat
(clockwise).
: Open the low speed screw (L) one
full turn.
* see "Guide to Using this Manual"
34
Adjusting idle speed
Engine stops while idling
: Carry out standard setting on low
speed screw (L).
: Turn the idle speed screw (LA)
slowly clockwise until the chain
begins to run – then turn the screw
back two full turns.
Chain runs when engine is idling
: Carry out standard setting on low
speed screw (L).
: Turn the idle speed screw (LA)
slowly counterclockwise until the
chain stops running – then turn the
screw another two full turns in the
same direction.
Erratic idling behavior, poor
acceleration
: Carry out standard setting on low
speed screw (L).
Idle setting is too lean:
: Turn low speed screw (L)
counterclockwise until the engine
runs and accelerates smoothly.
It is usually necessary to change the
setting of the idle speed screw (LA)
after every correction to the low speed
screw (L).
Fine Tuning for Operation at High
Altitude
A slight correction of the setting may be
necessary if the engine does not run
satisfactorily:
: Check the standard setting.
: Warm up the engine.
: Turn the high speed screw (H)
clockwise (leaner) – no further than
stop.
If the setting is too lean there is a
risk of engine damage due to
insufficient lubrication and
overheating.
MS 192 T