14.3
Fine Tuning for Operation at
High Altitude
A slight correction of the setting may be neces‐
sary if engine does not run satisfactorily:
► Carry out the standard setting.
► Warm up the engine.
► Turn high speed screw (H) slightly clockwise
(leaner) – no further than stop.
NOTICE
After returning from high altitude, reset the car‐
buretor to the standard setting.
If the setting is too lean there is a risk of engine
damage due to insufficient lubrication and over‐
heating.
15 Spark Arresting Screen in
Muffler
WARNING
To reduce the risk of fire caused by hot particles
escaping from the machine, never operate the
machine without a spark arresting screen, or with
the spark arresting screen damaged. Do not
modify the muffler or spark arresting screen.
NOTICE
According to the law or regulations in some
countries or states, certain operations may only
be carried out if a properly serviced spark arrest‐
ing screen is provided.
373BA031 KN
1
2
If the engine power is decreasing or does not run
smoothly at maximum RPM, check the spark
arresting screen (not available in all versions) in
the muffler.
15 Spark Arresting Screen in Muffler
English
0458-372-0121-C
19
