Qualcast QG-PH2652 Original Operating Instructions page 13

copper wire brush. Thereafter service the spark
plug after every 50 hours of operation.
'The spark plug is located at the front of the
engine by the front handle (Fig. 13).
1. Clip the Hook (Fig. 14A & 14B / Item 22), under
the arm of the spark plug boot (Fig. 14C / Item
17) and remove it, by pulling away from the
engine (Fig. 13).
2. Remove the spark plug (Fig. 14C) with the
supplied spark plug wrench.
3. Assemble in reverse order.'
7.2.3 Maintenance of the gearbox (Fig. 15)
The gearbox must be lubricated every year
before the start of the season by removing the
screw cover from the base of the gearbox, and
adding the grease via the hole. (Fig. 15/Item A).
If you use the trimmer frequently, grease the
gearbox more often.
7.2.4 Carburettor settings
Important. Settings on the carburettor may only
be made by authorized customer service
personnel. The air filter cover must be removed
before any work on the carburettor, as shown in
Figures 9 – 10.
Setting the throttle cable:
If the maximum speed of the machine falls over
time and you have ruled our all the other causes
listed in section 9 Troubleshooting, it may be
necessary to adjust the throttle cable.
First of all check whether the carburettor opens
fully when the throttle handle is pressed fully. This is
the case if the carburettor slide (Fig. 16/Item 1)
rests against the stop (Fig. 16/Item 2) when the
throttle is fully open. Figure 16 shows the correct
setting. If the carburettor slide does not touch the
stop, it must be adjusted.
The following work is required to adjust the
throttle cable:
• Undo the lock nut (Fig. 17/Item 3) a few turns.
• Undo the adjusting screw (Fig. 18/Item 4) until
the carburettor slide rests against the stop when
the throttle is fully open, as shown in Figure 16.
• Retighten the lock nut.
Setting the idling speed:
Important. Set the idling speed when the
machine is warm.
Helpline No. UK 0151 649 1500 / IRE 189 094 6244
If the engine stalls when the throttle is not pressed
and you have ruled out all the other causes listed
in section 9 Troubleshooting, the idling speed
must be adjusted. To do this turn the idling speed
screw (Fig. 19/Item 5) clockwise until the machine
runs smoothly at idling speed.
If the idling speed is so fast that the cutting blades
do not reach a standstill, the idling speed must
be reduced by turning the idling speed screw
(Fig. 19/Item 5) counterclockwise until the cutting
blades stop.
7.3 Storage
Please note: If you fail to follow these instructions
correctly, deposits may form on the interior of the
carburettor which may result in the engine being
more difficult to start or the machine suffering
permanent damage.
1. Carry out all the maintenance work.
2. Drain the fuel out of the tank (use a
conventional plastic petrol pump from a
DIY store for this purpose).
3. When the fuel has been drained,
start the engine.
4. Allow the engine to run at idling speed until it
stops. This will clean the remainder of the fuel out
of the carburettor.
5. Leave the machine to cool
(approx. 5 minutes).
6. Remove the spark plug (see point 7.2.2).
7. Place a teaspoon full of 2-stroke engine oil into
the combustion chamber. Pull the starter cable
several times carefully to wet the internal
components with the oil. Fit the spark plug again.
8. Clean the exterior housing of the machine.
9. Store the machine in a cold, dry place where it
is out of the reach of ignition sources and
inflammable substances.
10. Always place the cover over the cutter when
transporting or storing the equipment.
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