ENNO
49
SVFIDAPL
0478 192 9810 A - EN
21.2 REACH
REACH is an EC Directive for the
registration, evaluation, authorisation and
restriction of chemicals.
Information on compliance with the
REACH Directive (EC) No. 1907/2006 is
available from www.stihl.com/reach.
Fault:
Starter turns, engine does not start.
Possible cause:
– Throttle lever set to the MIN position.
– Choke position (throttle lever) not
selected.
– Choke knob not operated
(RT 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 spark
plug.
– Engine flooded due to several starting
attempts.
– Clogged air filter.
– Battery almost discharged.
Remedy:
– Set throttle lever to the MAX position.
– Set throttle lever to the choke
position. (Ö 8.2)
– Operate choke knob (RT 4112 SZ).
(Ö 8.4)
– Refill fuel tank.
– Open fuel cock. (Ö 14.8)
– 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 the MIN position and start
several times with spark plug removed;
screw in spark plug and connect spark
plug socket. (@)
– Clean air filter. (@)
– Check charge state of battery and
charge battery if necessary. (Ö 14.19)
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 11.)
– Check battery connections. (Ö 14.18)
– Charge the battery. (Ö 14.19)
– 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.
RT 4097.0 S:
A = 1160 mm
B = 978 mm
C = 1155 mm
D = 1135 mm
E = 1247 mm
F = 1870 mm
G = 1914 mm
RT 4112.0 S:
A = 1316 mm
B = 978 mm
C = 1155 mm
D = 1135 mm
E = 1247 mm
F = 1870 mm
G = 1914 mm
RT 4112.0 SZ:
A = 1316 mm
B = 1012 mm
C = 1175 mm
D = 1150 mm
E = 1247 mm
F = 1870 mm
G = 1914 mm
22. Troubleshooting
# If necessary, contact a specialist
dealer; STIHL recommends STIHL
specialist dealers.
@ See engine instruction manual.
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