Viking MB 448 - Troubleshooting

14
0478 111 9912 I - EN
Fault Possible cause Remedy Illustra -
tion
Page
- Engine will not start - Motorstop lever is not pressed
- No fuel in tank;
fuel line blocked
- Inferior, dirty or old fuel in tank
- Dirty air filter
- Spark plug socket disconnected
from spark plug; ignition lead
incorrectly fastened to socket
- Spark plug dirty or damaged;
incorrect electrode gap
- Engine is flooded due to several
starting attempts
- Mower housing is blocked
- Press motorstop lever to
handlebar
- Top up fuel, clean fuel line
- Always use fresh, good quality
fuel, normal unleaded petrol;
clean carburettor
- Clean air filter
- Connect spark plug socket;
check connection between
ignition lead and connector
- Clean or replace spark plug;
adjust electrode gap
- Remove spark plug and dry; pull
starter cord repeatedly with the
spark plug removed
- Clean the mower housing.
(disconnect spark plug socket
before cleaning)
- Work at appropriate cutting
height and mowing speed for
mowing conditions
- Clean mower housing
(disconnect spark plug socket
before cleaning)
- Clean air filter
- Clean spark plug
- Re-sharpen or replace mowing
blade
- Empty fuel tank, clean fuel line
and carburettor
- Mowing grass which is too long
or too wet
- Mower housing is blocked
- Dirty air filter
- Dirty spark plug
- Mowing blade is blunt or worn
- Water in fuel tank and
carburettor; carburettor blocked
- Starting problems or
deteriorating engine
performance
Troubleshooting
8
7
7
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9
6
9
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10
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8
17
16
11
9
9
17
 see engine instruction manual
 If necessary, contact a specialist dealer; VIKING recommends VIKING specialist dealers.