Viking MB 248 Manual De Instrucciones página 47

MB 253.1 T:
Engine type: B&S Series 625
Nominal output at 2,2-2800
nominal speed: kW-rpm
Displacement: 150 ccm
Fuel tank: 0,8 l
Speed of cutting
utilities: 2800 rpm
Engine output speed: 2800 rpm
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 85 dB(A)
pA
Uncertainty K 2 dB(A)
pA
Specified vibration
characteristic in
accordance with
EN 12096:
Measured value a 5,00 m/sec
hw
Uncertainty K 2,50 m/sec
hw
Measurement in
accordance with
EN 20643
Weight: 28 kg
18. Troubleshooting
If necessary, contact a specialist
dealer; VIKING recommends VIKING
specialist dealers.
@ See engine instruction manual.
0478 111 9928 B - EN
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. ( 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
2
electrode gap.
2
– 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!). ( 11.2)
– 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.
– Engine mounting loose.
Remedy:
– Check mowing blade, blade shaft and
blade fastening (blade fastening screw
and retaining washer), and repair if
necessary.
– Tighten engine mounting bolts.
Fault:
Poor cut, lawn turning yellow
Possible cause:
– Mowing blade is blunt or worn,
Remedy:
– Sharpen or replace the mowing blade
( 11.5), ( 11.5),
45