Viking MB 248 Manuel D'utilisation page 44

MB 253.0 / MB 253.0 T:
In accordance with
Directive
2000/14/EC:
Guaranteed sound
power level L 98 dB(A)
WAd
In accordance with
Directive
2006/42/EC:
Sound pressure level
at workplace L 86 dB(A)
pA
Uncertainty K 1 dB(A)
pA
Specified vibration
characteristic in
accordance with
EN 12096:
Measured value a 6.40 m/sec
hw
Uncertainty K 2.56 m/sec
hw
Measurement in
accordance with
EN 20643
L/W/H: 160/55/106 cm
Weight: 30/33 kg
MB 248.3 / MB 248.3 T
MB 253.0 / MB 253.0 T:
Safety device: Motorstop
Starter: Rope start
Tightening torque for
blade fastening
screw: 60 - 65 Nm
Self-propulsion, rear
wheels (MB 248.3 T/
MB 253.0 T) 1 forward gear
Wheel dimensions,
front: 180 mm
Wheel dimensions,
rear: 200 mm
Cutting height: 25 - 75 mm
Grass catcher box
capacity: 55 l
42
18. Troubleshooting
If necessary, contact a specialist
dealer; VIKING recommends VIKING
specialist dealers.
@ See engine instruction manual.
Fault:
Engine does not start
Possible cause:
– Motorstop lever not pressed.
– No fuel in tank; fuel line blocked.
– Inferior, dirty or old fuel in tank.
2 – Air filter dirty.
– Spark plug socket detached from spark
2
plug; ignition lead not properly fastened
to socket.
– Spark plug dirty or damaged; incorrect
electrode gap.
– Primer not actuated (MB 248,
MB 248 T).
Remedy:
– Press motorstop lever to handlebar and
hold. ( 10.1)
– Top up fuel; clean fuel line.
– Always use fresh, good quality fuel,
unleaded petrol; clean carburettor.
– Clean air filter.
– Connect spark plug socket; check
connection between ignition lead and
socket.
– Clean or replace spark plug; adjust
electrode gap.
– Press primer three times before
starting. ( 10.1)
Fault:
Starting problems or deteriorating engine
power.
Possible cause:
– Lawn mower housing blocked.
– Mowing at an excessively low cutting
height or propulsion speed is too high in
relation to the cutting height.
– Water in fuel tank and carburettor;
carburettor blocked.
– Fuel tank contaminated.
– Air filter dirty.
– Spark plug dirty.
Remedy:
– Clean lawn mower housing (detach
spark plug socket!). (
– Select a higher cutting height or reduce
the pushing speed. ( 7.7)
– Empty fuel tank, clean fuel line and
carburettor.
– Clean fuel tank.
– Clean air filter.
– Clean spark plug.
Fault:
Engine overheating.
Possible cause:
– Oil level in engine too low.
– Cooling ribs dirty.
Remedy:
– Change engine oil. ( 7.8)
– Clean cooling ribs. ( 11.2)
Fault:
Excessive vibration during operation.
Possible cause:
– Cutting unit defective.
0478 111 9922 B - EN
11.2)