MAINTENANCE
Fine adjustment of the idle speed TCorrectly adjusted carburettor
Adjust the idle speed using the idle adjustment screw T, if it is When the carburettor is correctly adjusted the machine will
necessary to readjust. First turn the idle adjustment screw T accelerate without hesitation and burble a little at maximum
clockwise until the cutting attachment starts to rotate. Then speed. It is also important that the cutting attachment does
turn the screw anticlockwise until the cutting attachment not rotate at idle. If the low speed jet L is set too lean it may
stops. The idle speed is correctly adjusted when the engine cause starting difŢculties and poor acceleration.
will run smoothly in every position. The idle speed should also If the high speed jet H is set too lean it will result in less power,
be well below the speed at which the cutting attachment starts less performance, poor acceleration and/or damage to the
to rotate.engine.
If both the L and H jets are set too rich it will results in
acceleration problems or too low a working speed.
Adjusting the start throttle speed
The correct start throttle speed is set by means of an adjuster
on the rear of the handle next to the cable. Use this screw (4
mm Allen screw) to increase or decrease the start throttle
speed.
WARNING! 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 Proceed as follows:
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 1 Run the machine at idle.
full speed for more than 10 seconds.
2 Press the start throttle lock as described under the
heading Starting and stopping.
3 If the start throttle speed is too low (below 4000 rpm), turn
the adjuster screw A clockwise until the cutting
attachment starts to rotate. Then turn A clockwise a
further 1/2 turn.
4 If the start throttle speed is too high, turn the adjuster
screw A anticlockwise until the cutting attachment stops.
Then turn adjuster screw A clockwise a further 1/2 turn.
Note that the engine should be loaded when you adjust the
high speed jet H. You should therefore Ţt the trimmer head
T35 (2.7 mm cord) before adjusting the high speed jet. The WARNING! If the idle speed cannot be
cord length should be standard, i.e. to the knife on the trimmer !adjusted so that the cutting attachment
guard.stops, contact your dealer/service
workshop. Do not use the machine until it
Apply full throttle and turn the high speed jet H very slowly has been correctly adjusted or repaired.
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.
H
CAUTION! For optimum adjustment of the carburettor,
contact a qualiŢed dealer/service workshop that has a
revolution counter at their disposal.
English � 25 |
ACEC
