7.5 Checking the Spark Plugs
► Place the STIHL machine on a level surface.
► Stop the engine and allow it to cool down.
NOTICE
■ The engine has two spark plugs. Both spark
plugs must be checked.
► Detach spark plug socket (1).
► If the area around spark plug (2) is dirty: clean
the area around spark plug (2) with a cloth.
► Unscrew spark plug (2).
► Clean spark plug (2) with a cloth.
► Measure electrode gap (A) using a feeler
gauge. Adjust if necessary: A = 0.8 mm.
► If spark plug (2) is corroded: replace spark
plug (2), 9.2.
► Screw in spark plug (2) firmly by hand.
► Tighten spark plug (2) using a spark plug
wrench.
–
Used spark plug: 1/8 to 1/4 turn.
–
New spark plug: 1/2 turn.
► Press on spark plug socket (1) firmly.
► Check the second spark plug in the same way.
7.6 Changing the Engine Oil using
the Oil Drain Tube
Warm engine oil drains quickly and completely.
► Allow the engine to warm up.
► Run the tank empty.
► Stop the engine.
► Place the STIHL machine on a level surface.
CAUTION
■
Danger of burns
► Do not touch hot engine parts.
►
Unscrew oil dipstick (1), 7.2.
► Unscrew screw plug (3) from oil drain tube (2)
using two spanners (A/F 19 and A/F 15).
► Remove screw plug (3) and seal ring (4).
► Discard seal ring (4).
► Allow all the engine oil to drain into a suitable
container.
► Fit new seal ring (4) onto screw plug (3).
► Install screw plug (3) in oil drain tube (2) and
tighten to 14 Nm.
►
Add fresh engine oil, 5.2.
►
Screw in oil dipstick (1), 7.2.
8 Specifications
8.1 Exhaust Emissions
The CO
2
value measured in the EU type approval
procedure is specified at www.stihl.com/co2.
The measured CO
2
value was determined on a
representative engine in accordance with a
standardized test procedure under laboratory
conditions and does not represent either an
explicit or implied guarantee of the performance
of a specific engine.
The applicable exhaust emission requirements
are fulfilled by the intended usage and mainte‐
nance described in this instruction manual. The
type approval expires if the engine is modified in
any way.
9 Spare Parts and Accesso‐
ries
9.1 Spare parts and accessories
These symbols indicate original STIHL
spare parts and original STIHL acces‐
sories.
STIHL recommends the use of original STIHL
spare parts and accessories.
Despite ongoing market observation, STIHL is
unable to judge the reliability, safety and suitabil‐
8 Specifications English
0478-983-9914-B 13
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