Qualcast CDB30 Assembly Manual - page 12
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Customer Helpline
0845 034 2279
www.gardenservicecentre.co.uk
Customer Helpline
0845 034 2279
www.gardenservicecentre.co.uk
Troubleshooting
General Troubleshooting
CAUTION! Always switch off the engine and pull the ignition cable before starting any inspection
or adjustment work.
CAUTION! If, after making an adjustment or repair to the engine, you let it run for a few minutes,
remember that the exhaust and other parts will get hot. Thus, do not touch parts that emanate
heat, as these may burn you.
The following table provides solutions to common problems encountered with the grass trimmer.
Fault
Possible Cause
Solution
Engine not starting
1. Empty tank
2. Flooded engine
3. Fouled spark plug (remains of
carbon on the electrodes)
4. Electrode gap too large
5. Fouled carburetor or its jets
6. Damaged spark plug connection
or damaged spark plug
1. Fill up
2. Close the throttle, pull cord several
times, if required take out the spark
plug and dry it
3. Clean the spark plug, check its
temperature, replace if needed.
4. Adjust at 0.6-0.7 mm
5. Clean the carburetor with air
6. Replace the spark plug.
Engine runs too fast
when idle
1. Cold engine
1. Warm up slowly; alternatively
close the choke a bit.
Engine does not
reach its maximum
speed
1. Fouled spark plug (remains of
carbon on the electrodes) spark
gap to large
2. Fouled carburettor or its jets
3. Fouled air filter
4.Exhaust, exhaust channel
5. Sealing ring in crankcase not
sealing properly
6. Worn cylinders, pistons and
piston rings
7. Wrong fuel mix (too much oil)
8. Bad ignition
1. Clean the spark plug, check its
temperature, replace if needed.
Adjust at 0.6-.07 mm.
2. Clean the carburettor with air
3. Clean
4. Take out the exhaust and clean it,
remove remains of carbon
5. Replace
6. Replace the cylinder, piston or
piston rings, reface the cylinder and
piston, assembly
7. Fill up according to the instructions
8. Adjust the ignition coil gap (0.3-0.4
mm)
Engine would not
stop
1. The switch was failed.
2. The wiring terminal. was
disconnected.
1. Change the switch.
2. Connect up the wiring terminal.
Technical Data
Technical Data Table
Property
Value
Engine type
Single-cylinder, 2-stroke
Displacement(cc)
29.9 cc
Max power /Engine speed
0.75 kW/8000 min
-1
Max torque/engine speed
1 N.m/6000 min
-1
Specific fuel consumption
650 g / kW.h
Tank capacity
410 ml
Cutting diameter
400 mm
Ignition
C.D.I
Diameter of cutting cord
2 mm
Net weight
4,9 kg
Sound pressure level L
PA
(dB)
100 dB K=3 dB
Sound power level L
WA
(dB)
110
Vibration (m/s
2
)
13 m/s
2
K=1.5 m/s
2
Spark type
L8RTF
Disposal
Disposal Instructions
The grass trimmer and its accessories are made of various recyclable materials. Dispose of the
grass trimmer in accordance with your local recycling regulations.