HS 46, HS 46 C, HS 56 C
English
17
Erratic idling behavior, poor acceleration
N Idle setting is too lean: Rotate the
low speed screw (L) about 1/4 turn
counterclockwise (no further than
stop) until the engine runs and
accelerates smoothly.
Machine stops when it is swung at idle
speed
N Idle setting is too rich: Rotate the
low speed screw (L) about 1/4 turn
clockwise (no further than stop) until
the engine idles smoothly.
It is usually necessary to change the
setting of the idle speed screw (LA) after
every correction to the low speed
screw (L).
Fine Tuning for Operation in Mountains
or at Sea Level
A slight correction of the setting of the
high speed screw (H) may be necessary
if engine power is not satisfactory when
operating at high altitude or at sea level.
N Check the standard setting.
N Warm up the engine.
N Adjust idle speed properly.
At high altitude
N Turn high speed screw (H)
clockwise (leaner) – no further than
stop.
At sea level
N Turn high speed screw (H)
counterclockwise (richer) – no
further than stop.
If the setting is too lean there is a risk of
engine damage due to insufficient
lubrication and overheating.
In some countries the muffler is
equipped with a spark arresting screen.
N If the engine is down on power or
maximum speed is irregular, check
the spark arresting screen in the
muffler.
Wait for the engine to cool down
completely before performing this work.
N Use a 15 mm socket wrench to
unscrew the spark arresting screen.
N Clean the spark arresting screen. If
the screen is damaged or heavily
carbonized, fit a new one.
N Refit the spark arresting screen and
tighten it down firmly.
Spark Arresting Screen in
Muffler
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