Electrical; Spark Plug - Yamaha EF3000iSE Service Manual

SPARK PLUG

ELECTRICAL

SPARK PLUG
WARNING
Inspect and adjust the areas around the
cylinder head after the engine has cooled
down completely.
CAUTION:
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:
• Panel 4
Refer to "COVERS, PANELS, AND
CAPS".
2. Remove:
• Spark plug cap
• Spark plug
3. Inspect:
• Electrode 1
Wear/damage → Replace.
• Insulator color 2
4. Measure:
• Spark plug gap a
Use a wire gauge or thickness gauge.
Out of specification → Regap.
SVU2240J
Spark plug gap:
If necessary, clean the spark plug with a spark
plug cleaner.
Standard spark plug (with resistor):
BPR4ES (NGK)
Before installing the spark plug, clean the gas-
ket surface and plug surface.
SVU2250J
2-18
INSP
ADJ
0.7 ~ 0.8 mm (0.028 ~ 0.031 in)