Yamaha EF2800i Service Manual page 82

• Turn the crankshaft and measure the igni-
tion spark gap a.
Minimum spark gap:
6 mm (0.24 in)
3. Spark plug cap
• Remove the spark plug cap.
• Connect the pocket tester (Ω × 1k) to the
spark plug.
Tester (+) lead → Spark plug side 1
Tester (–) lead → High-tension cord side 2
Spark plug cap resistance:
4.0 ~ 6.0 kΩ at 20 °C (68 °F)
4. Ignition coil resistance
• Remove the ignition coil.
1) Primary coil resistance
• Connect the pocket tester (Ω × 1k) to the
primary terminal.
Tester (+) lead → White/Blue terminal 1
Tester (–) lead → Black terminal 2
Primary coil resistance:
0.11 Ω ± 15% at 20 °C (68 °F)
*
OUT OF
SPECIFICATION
OR NO SPARK
SVU4070
MEETS
SPECIFICATION
MEETS
SPECIFICATION
4-5
IGNITION SYSTEM
MEETS SPECIFICATION
The ignition system is good.
NOTE:
• Do not pull out the plug cap from the high-
tension cord.
• Remove → Turn the plug cap counterclock-
wise.
• Install → Turn the plug cap clockwise.
• Inspect the high-tension cord for cracks or
deterioration, when install the pug cap.
• Cut 5 mm off the end of the high-tension
cord, and then connect it to the plug cap.
OUT OF SPECIFICATION
Replace the spark plug cap.
2
1
OUT OF SPECIFICATION
Replace the ignition coil.
– +
ELEC
SVU4080