Operating The Saw - Stihl MS 651 Instruction Manual

English

11 Operating the Saw

11.1 Setting to winter mode
The carburetor may ice up if the engine is oper‐
ated at temperatures below +10 °C. The shutter
must be set to the winter mode so that the carbu‐
retor is additionally heated by warm air from
around the engine.
NOTICE
■ The engine may overheat if is operated in win‐
ter mode at temperatures above +10 °C.
► Change setting to summer mode.
► Shut off the engine and engage the chain
brake.
1
► Remove the filter cover (1).
► Pull out the shutter (2).
3
► Push the shutter (2) into the guides (3) as far
as it will go.
You will feel it engage.
► Fit the filter cover (1).
11.2 Setting to summer mode
The shutter must be set to summer mode when
working at temperatures above +10 °C.
► Shut off the engine and engage the chain
brake.
18
► Remove the filter cover (1).
► Pull out the shutter (2).
2
► Push the shutter (2) into the guides (3) as far
► Fit the filter cover (1).
11.3
If you use the chainsaw at high altitude, the
engine will not deliver optimum power. The car‐
buretor setting can be adjusted to obtain opti‐
3
mum engine power.
► Start the engine and disengage the chain
► Warm up the engine by opening and closing
■ If the chainsaw is again used at a low altitude,
► Rotate the high speed screw H clockwise
1
3
as it will go.
You will feel it engage.
Adjusting Carburetor for Opera‐
tion at High Altitude
brake.
the throttle for about 1 minute.
H
NOTICE
the engine may overheat.
► Carry out the standard setting.
until the engine delivers optimum power.
11 Operating the Saw
3
0458-784-0121-C
2