Carefully turn both adjusting screws
N
counterclockwise as far as stop.
High speed screw (H) is open a 3/4 turn,
and the low speed screw (L) is open a
3/4 turn.
Start and warm up the engine.
N
Adjust idle speed with the idle speed
N
screw (LA) so that the cutting
blades do not run.
Fine Tuning
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.
Turn the high speed screw (H)
N
about one quarter of a turn for every
3300 ft (1000 m) change in altitude.
Carry out the standard setting
N
without disturbing the high speed
screw (H).
HL 100, HL 100 K
Warm up the engine for about 3
N
minutes.
Open the throttle wide.
N
At high altitude
Turn the high speed screw (H)
N
clockwise (leaner), no further than
stop, until there is no noticeable
increase in engine speed.
At sea level
Turn the high speed screw (H)
N
counterclockwise (richer), no further
than stop, until there is no further
noticeable increase in engine
speed.
It is possible that maximum engine
speed may be reached with the standard
setting in each case.
Adjusting Idle Speed
It is usually necessary to change the
setting of the idle speed screw (LA) after
every correction to the low speed
screw (L).
Warm up the engine for about 3
N
minutes.
Engine stops while idling
Turn the idle speed screw (LA)
N
slowly clockwise until the engine
runs smoothly – the cutting blades
must not run.
Cutting blades run when engine is idling
Turn the idle speed screw (LA)
N
counterclockwise until the cutting
blades stop running and then turn
the screw about another 1/2 to
3/4 turn in the same direction.
WARNING
If the cutting blades continue to run
when the engine is idling, have your
machine checked and repaired by your
servicing dealer.
Erratic idling behavior, engine stops
even though setting of LA - screw has
been corrected, poor acceleration
Idle setting is too lean
Turn the low speed screw (L)
N
counterclockwise, no further than
stop, until the engine runs and
accelerates smoothly.
Erratic idling behavior
Idle setting is too rich
Turn the low speed screw (L)
N
clockwise, no further than stop, until
the engine runs and accelerates
smoothly.
English
25