Electrical; Spark Plug - Yamaha EF1000iS Service Manual

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SPARK PLUG

ELECTRICAL

SPARK PLUG
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Inspect and adjust the areas around the
cylinder head after the engine has cooled
down completely.
cC
Before removing the spark plug, use com-
pressed air to clean the cylinder head
cover to prevent dirt from falling into the
engine.
1. Remove:
9 Cover
2. Remove:
9 Spark plug cap
9 Spark plug
3. Inspect:
9 Electrode 1
Wear/damage → Replace.
9 Insulator color 2
4. Measure:
9 Spark plug gap a
Use a wire gauge or thickness gauge.
Out of specification → Regap.
If necessary, clean the spark plug with
a spark plug cleaner.
Spark plug gap:
0.7 ~ 0.8 mm (0.028 ~ 0.031 in)
Standard spark plug
(with resistor):
CR6HSA (NGK)
Before installing the spark plug, clean
the gasket surface and plug surface.
2-14
INSP
ADJ