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Replacing The Spark Plug; Checking The Ignition Spark; Checking The Mufß Er Screws - Makita DCS6400 Instruction Manual

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Replacing the spark plug

CAUTION:
Do not touch the spark plug or plug cap if the engine is
running (high voltage).
Switch off the engine before starting any maintenance work.
A hot engine can cause burns. Wear protective gloves!
The spark plug must be replaced in case of damage to the
insulator, electrode erosion (burn) or if the electrodes are very
dirty or oily.
Remove the Þ lter cover (see „Cleaning the air Þ lter").
Pull the plug cap (6) off the spark plug. Use only the universal
wrench supplied with the saw to remove the spark plug.
Electrode gap
The electrode gap must be 0.5 mm.

Checking the ignition spark

Stick the universal wrench (7) between the hood and cylinder
exactly as shown.
IMPORTANT! Do not stick the wrench in the spark plug
hole. It should touch only the cylinder (otherwise the engine
will be damaged!).
With the spark-plug cap Þ rmly attached to the unscrewed spark
plug (8), use insulated pliers to hold the plug against the tool
(away from the spark-plug hole!).
Switch the I/STOP ignition switch (9) as shown by the arrow.
Pull the starter cable hard.
If the function is correct, an ignition spark must be visible near
the electrodes.
CAUTION: Use only the following spark plugs: NGK BPMR 7A
or BOSCH WSR 6F.
Checking the mufß er screws
Careful!
Do not tighten the mufß er screws when the engine is hot!
Check the mufß er screws (10) for tightness. If they are loose,
hand-tighten them. Important - do not overtighten!
6
0,5 mm
B
7
8
9
C
10
D
25

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