Spark Arresting Screen In The Muffler; Checking The Spark Plug - Stihl TS 400 Cutquick Instruction Manual

Setting idling speed
: It is usually necessary to change the
setting of the idle speed adjusting
screw (LA) after every correction to
the low speed adjusting screw (L).
Engine stops at idle speed
: Set to standard setting
: Turn the idle speed adjusting screw
(LA) clockwise until the abrasive
wheel starts to run, then back off the
screw one quarter of a turn.
Abrasive wheel runs on at idle speed
: Set to standard setting
: Turn the idle speed adjusting screw
(LA) counterclockwise until the
abrasive wheel stops running, then
turn screw another quarter turn in
the same direction.
Erratic idling behavior,
poor acceleration
Idle setting is too lean (e.g. at cold
ambient temp.):
: Turn the low speed adjusting
screw (L) counterclockwise - until
engine runs and accelerates
smoothly.
TS 400
Spark arresting screen*
in the muffler
1
The spark arresting screen in the muffler
must be checked if the engine
performance deteriorates.
: Remove the retaining clip (1) and
spark arresting screen (2) with
suitable pliers
: Clean the soiled spark arresting
screen.
: The screen must be replaced if it
is damaged or there is a severe
build-up of carbon.
: Refit the spark arresting screen and
retaining clip
* see "Guide to Using this Manual"

Checking the Spark Plug

2
Wrong fuel mix (too much engine oil in
the gasoline), a dirty air filter and
unfavorable running conditions (mostly
at part throttle etc.) affect the condition of
the spark plug. These factors cause
deposits to form on the insulator nose
which may result in trouble in operation.
English / USA
37