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Viking MT 4112SZ Manual

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0478 192 9803 B - EN
54
Fault:
Starter turns, engine does not start.
Possible cause:
– Throttle lever set to MIN position.
– Choke position (throttle lever) is not
selected.
– Choke knob not operated
(MT 4112 SZ).
– No fuel in tank.
– Fuel cock closed.
– Insufficient flow of fuel.
– Spark plug dirty or damaged.
– Incorrect electrode gap.
– Spark plug socket detached from the
spark plug.
– Engine is flooded due to several
starting attempts.
– Clogged air filter.
– Battery almost discharged.
Remedy:
– Set the throttle lever to the MAX
position.
– Set throttle lever to the choke
position. (Ö 8.2)
– Operate choke knob (MT 4112 SZ).
(Ö 8.4)
– Refill fuel tank.
– Open fuel cock. (Ö 13.12)
– Check fuel filter. (@)
– Clean or replace spark plug. (@)
– Adjust electrode gap. (#)
– Connect spark plug socket; check
connection between ignition lead and
socket. (#)
– Remove spark plug and dry; set throttle
lever to MIN position and start several
times with spark plug removed; screw in
spark plug and connect spark plug
socket. (@)
– Clean the air filter. (@)
– Check charge state of the battery and
charge battery if necessary. (Ö 13.16)
Fault:
Starter not functioning.
Possible cause:
– The safety devices are blocking the
starter.
– Battery not or incorrectly connected.
– Battery completely discharged or not
sufficiently charged.
– Main fuse (150 A) defective.
– Faulty earth connection to engine or
chassis.
– Starter defective.
Remedy:
– Check all the safety devices. (Ö 10.)
– Check battery connections. (Ö 13.15)
– Charge the battery. (Ö 13.16)
– Replace the main fuse. (#)
– Check the connection cables at the
battery and at the chassis. (#)
– Repair the starter. (#)
Fault:
Starting problems or deteriorating engine
power.
Possible cause:
– Water in fuel tank and carburettor;
carburettor is blocked.
– Contaminated fuel tank.
– The air filter is dirty.
– Dirty spark plug.
– Mowing grass which is too long or too
wet.
Remedy:
– Empty fuel tank, clean fuel tank, fuel
line and carburettor. (#)
– Clean fuel tank. (#)
– Clean/replace air filter. (@)
– Clean spark plug. (@)
– Adapt cutting level and driving speed to
the mowing conditions.
Fault:
Engine overheating.
Possible cause:
– Dirty cooling ribs.
– Engine oil level too low.
– V-belt worn.
Remedy:
– Clean cooling ribs. (@)
– Check the engine oil level and top up
the engine oil if necessary. (Ö 13.9)
– Replace the V-belt. (#)
Fault:
Machine does not drive.
Possible cause:
– Gearbox disengaged.
– V-belt (gearbox) detached.
– V-belt (gearbox) worn or defective.
– Missing feather key between rear axle
and rear wheels.
Remedy:
– Engage the gearbox (freewheel lever).
(Ö 8.13)
– Fit V-belt (gearbox). (#)
– Replace V-belt (gearbox). (#)
– Install feather key. (Ö 13.8)
21. Troubleshooting
# If necessary, contact a specialist
dealer; VIKING recommends VIKING
specialist dealers.
@ See engine instruction manual.
… 56 …


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