Checking The Air Gap; Checking The Ignition Coil (Tci Unit, Primary) Resistance; Checking The Ignition Coil (Tci Unit, Secondary) Resistance - Yamaha EH63 Service Manual

ELECTRICAL COMPONENTS
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d. Set the engine switch to "RUN".
e. Measure the ignition spark gap "a".

CHECKING THE AIR GAP

1.
Check:
• Measure the gap between the flywheel and TCI
unit.
Out of specification  Adjust the TCI unit.
(Refer to "INSTALLING THE TCI UNITS" on page
3-23.)
TCI unit air gap:
CHECKING THE IGNITION COIL (TCI UNIT,
PRIMARY) RESISTANCE
1.
Check:
• Primary coil resistance
Out of specification  Replace.
Primary coil resistance:
a. Remove the ignition coil (TCI unit).
b. Connect the digital circuit tester () to the pri-
mary terminal.
2
Digital circuit tester (CD732):
Model 88 Multimeter with tachometer:
• Positive tester probe 
Wire "1"
• Negative tester probe 
Body ground "2"
c. Measure the primary coil resistance.
CHECKING THE IGNITION COIL (TCI UNIT,
SECONDARY) RESISTANCE
1.
Check:
• Secondary coil resistance
Out of specification  Replace.
Secondary coil resistance:
5-7
0.3–0.5 mm (0.011–0.019 in)
0–5 
90890-03243
YU-A1927
8–16 k