Stihl MS440, Инструкция по эксплуатации

Страница: 39 / 52

MS 440
English
37
Fine Tuning for Operation at High
Altitude
A slight correction of the setting may be
necessary if engine does not run
satisfactorily:
N
Carry out the standard setting.
N
Warm up the engine.
N
Turn the high speed screw (H)
slightly clockwise (leaner). On
carburetors with H = 3/4, turn no
further than stop.
NOTICE
After returning from high altitude, reset
the carburetor to the standard setting.
If the setting is too lean there is a risk of
engine damage due to insufficient
lubrication and overheating.
N
If the engine is down on power,
difficult to start or runs poorly at idle
speed, first check the spark plug.
N
Fit a new spark plug after about 100
operating hours – or sooner if the
electrodes are badly eroded. Install
only suppressed spark plugs of the
type approved by STIHL – see
"Specifications".
Removing the spark plug
N
Move the master control lever to the
stop position 0
N
Turn the knob above the rear handle
in the direction of the arrow and
remove the carburetor box cover
N
Remove air filter (1) (versions with
box filter)
N
Unplug spark plug boot (2)
N
Unscrew spark plug
Checking the Spark Plug
N
Clean dirty spark plug.
N
Check electrode gap (A) and
readjust if necessary – see
"Specifications".
N
Rectify the problems which have
caused fouling of the spark plug.
Possible causes are:
–
Too much oil in fuel mix.
–
Dirty air filter.
–
Unfavorable running conditions.
Spark Plug
145BA027 K
1
2
175BA002 KN
000BA039 KN
A