Viking MB 248 - 18. Troubleshooting; Engine will not start; Starting problems or deteriorating engine performance; Excessive vibration during operation

0478 111 9916 C - EN
15
18. Troubleshooting
Fault Possible cause Remedy
- Engine will not start - Motorstop lever is not pulled
- No fuel in tank; fuel line blocked
- Inferior, dirty or old fuel in tank
- Dirty air filter
- Spark plug socket detached from
spark plug; ignition lead not pro-
perly fastened to socket
- Spark plug dirty or damaged; in-
correct electrode gap
- Primer not actuated
- Press motorstop lever to handle-
bar
- 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 socket.
- Clean or replace spark plug; ad-
just electrode gap.
- Press the primer three times.
- Starting problems or deterio-
rating engine performance
- Lawn mower housing is blocked
- Mowing at an excessively low cut-
ting height or fast pushing speed
- Water in fuel tank and carburettor;
carburettor blocked
- Contaminated fuel tank
- Dirty air filter
- Dirty spark plug
- Clean housing (detach spark plug
socket)
- Set higher cutting height / reduce
pushing speed
- Empty fuel tank, clean fuel line
and carburettor
- Clean fuel tank
- Clean air filter
- Clean spark plug
Page Section
10
9
9


, @
10
10.01
07.07
07.07
10.01
11
9
@
@

, @
11.01
07.06
 see engine instruction manual
@ If necessary, contact a specialist dealer; VIKING recommends VIKING specialist dealers.
- Excessive vibration during
operation
- Cutting unit defective
- Loose engine mounting
- Check blade, blade shaft, nuts
and washers of cutting unit, repair
if necessary
- Tighten engine fastening bolts
- Engine overheating - Oil level in engine too low - Top up engine oil 9 07.07
@
@
DEENFRNLITESPTNOSVFIDAPLSLSK
TR