Adjusting The Carburetor; Stihl M-Tronic Engine Management System; Calibrating The Chain Saw; Winter Operation - Stihl MS 462 C-M Manual De Instrucciones

17 Adjusting the Carburetor

17 Adjusting the Carburetor

17.1 STIHL M-Tronic Engine Management System

The STIHL M-Tronic engine management system
electronically controls the ignition timing and fuel metering in
any operating condition, factoring in altitude and fuel quality.
This system provides optimum performance, whether you
are just starting to work or resuming after a break. Manual
carburetor adjustments are no longer required. The
carburetor does not have adjusting screws.

17.2 Calibrating the Chain Saw

WARNING
Before disengaging the chain brake and accelerating the
engine, position the chain saw in such a way that all parts of
your body are clear of the cutting attachment, @ 5.6.3.
The chain saw adjusts itself automatically for optimum
performance during operation. Calibrating enables the saw
to be adjusted faster for optimum performance.
► If the outside temperature is below 14 °F (-- 10 °C) or the
engine is cold, warm up the engine by opening and closing
the throttle for about 1 minute.
A
1
min
30-60 s
► Move the Master Control lever to position
► Engage the chain brake, @ 12.1.
0458-790-8621-A
B C
> 30 s
.
► Start the engine without depressing the throttle trigger.
The engine runs and the Master Control lever remains in
position .
► Run the engine for at least 30 seconds but no more than
60 seconds (A) without depressing the throttle trigger.
► Disengage the chain brake, @ 12.2.
► Fully depress the throttle trigger for at least
30 seconds (B) and hold it in that position.
The engine will accelerate, the chain will rotate and the
chain saw will be calibrated. Engine speed will vary
noticeably during calibration.
► If the engine shuts off, retry to calibrate. The calibration
was aborted.
► If the engine keeps shutting off, engage the chain brake
and have the chain saw inspected by an authorized STIHL
servicing dealer before further use.
► Release the throttle trigger as soon as the engine speed
drops noticeably (C).
The engine will run at idling speed. The chain saw is
successfully calibrated and ready for operation.
NOTICE
The chain saw may be incorrectly calibrated if the throttle
trigger is not kept fully depressed during calibration. This
may result in damage to the saw.
NOTICE
The calibration process will be aborted if the throttle trigger
is released before the saw is properly calibrated. It is then
necessary to restart the entire calibration process.

17.3 Winter Operation

The carburetor may ice up when the saw is used at ambient
temperatures below 50 °F (10 °C). To prevent icing, the
shutter must be converted to allow warm air from around the
s
engine to heat the carburetor.
► Shut off the engine, @ 15.
► Engage the chain brake, @ 12.1.
English
47