Viking MB 253 [44/392] Troubleshooting
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Viking MB 253 [44/392] Troubleshooting

Viking MB 253 [44/392] Troubleshooting
0478 111 9822 C - EN
42
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.
– Air filter dirty.
– Spark plug socket detached from spark
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. (Ö 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. (Ö 10.1)
In accordance with
Directive
2000/14/EC:
Guaranteed sound
power level L
WAd
96 dB(A)
In accordance with
Directive
2006/42/EC:
Sound pressure level
at workplace L
pA
85 dB(A)
Uncertainty K
pA
1 dB(A)
Specified vibration
characteristic in
accordance with
EN 12096:
Measured value a
hw
4.85 m/sec
2
Uncertainty K
hw
Measurement in
accordance with
EN 20643
2.43 m/sec
2
L/W/H: 155/52/106 cm
Weight: 27/29 kg
MB 253.0 / MB 253.0 T:
Serial number: 6371
Engine, design: 4-stroke com-
bustion engine
Engine type: Kohler XT675
Nominal output at
nominal speed:
2.2 - 2800
kW-rpm
Displacement: 149 ccm
Fuel tank: 1.4 l
Type of cutting
utilities: Cutter bar
Cutting width: 51 cm
Speed of cutting
utilities: 2800 rpm
Engine output speed: 2800 rpm
MB 248.3 / MB 248.3 T:
In accordance with
Directive
2000/14/EC:
Guaranteed sound
power level L
WAd
98 dB(A)
In accordance with
Directive
2006/42/EC:
Sound pressure level
at workplace L
pA
86 dB(A)
Uncertainty K
pA
1 dB(A)
Specified vibration
characteristic in
accordance with
EN 12096:
Measured value a
hw
6.40 m/sec
2
Uncertainty K
hw
Measurement in
accordance with
EN 20643
2.56 m/sec
2
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
MB 253.0 / MB 253.0 T:
18. Troubleshooting
# If necessary, contact a specialist
dealer; VIKING recommends VIKING
specialist dealers.
@ See engine instruction manual.

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