Ignition System; Troubleshooting Chart - Yamaha EF1000 Service Manual

IGNITION SYSTEM
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ELEC
11-==::J
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TROUBLESHOOTING CHART
NO SPARK OR WEAK SPARK
NOTE=------------------------------------------------------------
•Remove the following parts before troubleshooting.
1) Spark plug
• Use the following special tool(s) in this troubleshooting.
Pocket tester:
YU-03112(90890-03112)
1. Spark plug
•Check the spark plug condition.
Refer to the "SPARK PLUG" section in the
CHAPTER 2.
CORRECT
2. Ignition spark gap
•Disconnect the spark plug cap
CD
from
spark plug.
•Connect the ignition checker@ as shown.
Spark plug cap
(f)-+
Ignition checker
Ignition checker lead-+
Spark plug@
•Turn the crank and measure the ignition
spark gap@.
Minimum spark gap:
6 mm (0.24 in)
*
OUT OF
SPECIFICATION
OR NO SPARK
4-3
Dynamic spark tester (Ignition
Checker):
YM-34487 (90890-06754)
INCORRECT
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Repair or replace spark plug.
MEET SPECIFICATION
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Ignition system is good.