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English – 17
Low speed jet L
Try to find the highest idle speed by turning the low speed
jet L clockwise then anti-clockwise. When the highest
speed has been found, turn the low speed jet L 1/4 turn
anti-clockwise.
CAUTION! If the blades move while the engine is idling
the T screw should be turned anti-clockwise until they
stop.
Fine adjustment of the idle speed T
Adjust the idle speed with the idle adjustment screw T, if
adjustment is necessary. First turn the idle adjustment
screw T clockwise until the blades start to move. Then
turn the idle adjustment screw T anticlockwise until the
blades stop. The idle speed is correctly adjusted when the
engine runs smoothly in every position. There should also
be a clear margin to the speed at which the blades start
to move. The blades must also remain stationary when
the choke control is in the start throttle position.
IMPORTANT! If the idle speed cannot be adjusted so that
the cutting attachment stops, contact your dealer/service
workshop. Do not use the machine until it has been
correctly adjusted or repaired.
High speed jet H
The high speed jet H affects the engine power, speed,
temperature and fuel consumption. If the high speed jet H
is set too lean (screwed in too far) the engine speed will
be too high and cause engine damage. Do not let the
engine run at full speed for more than 10 seconds.
Apply full throttle and turn the high speed jet H very slowly
clockwise until the engine slows down. Then turn the high
speed jet H very slowly anticlockwise until the engine
starts to run unevenly. Now turn the high speed jet H
slowly clockwise a little way until the engine runs
smoothly.
Note that the engine should not be under load when you
adjust the high speed jet H. The high speed jet H is
adjusted correctly when the machine burbles a little. If the
machine races then the setting is too lean. If the engine
produces a lot of smoke and burbles a lot then the setting
is too rich.
CAUTION! For optimum adjustment of the carburettor,
contact a qualified dealer/service workshop that has a
revolution counter at their disposal.
Correctly adjusted carburettor
When the carburettor is correctly adjusted the machine
accelerates without hesitation and burbles a little at
maximum speed. It is also important that the blades do
not move when the engine is idling or when the choke
control is in the start position. If the low speed jet L is set
too lean it may cause starting difficulties and poor
acceleration.
If the high speed jet H is set too lean it will result in less
power, less performance, poor acceleration and/or
damage to the engine. If both the L and H jets are set too
rich it will results in acceleration problems or too low a
working speed.
L
L
+ 1/4
T
H
H