Checking The Ignition Spark Gap - Yamaha EH63 Service Manual

ELECTRICAL COMPONENTS
3
a
1
3.
Connect:
• Digital circuit tester
(Connect between the engine body and oil pressure
switch terminal.)
Digital circuit tester (CD732):
90890-03243
Model 88 Multimeter with tachometer:
YU-A1927
4.
Check:
• Oil pressure switch continuity
No continuity  Replace the oil pressure switch.

CHECKING THE IGNITION SPARK GAP

1.
Check:
• Engine oil level
Insufficient  Add the engine oil.
(Refer to "ENGINE OIL LEVEL" on page 2-5.)
2.
Check:
• Spark plug condition
Wear/damage  Replace.
(Refer to "SPARK PLUGS" on page 2-3.)
3.
Check:
• Ignition spark gap
Out of specification  Perform the ignition system
troubleshooting, starting with step 6.
(Refer to "ENGINE DOES NOT START" on page
6-1.)
Minimum ignition spark gap:
6.0 mm (0.2362 in)
TIP
If the ignition spark gap is within the specification, the igni-
tion system circuit is operating normally.
a. Disconnect the spark plug cap "1" from the spark
plug.
b. Connect the ignition checker "2" as shown.
c. Connect the ignition checker lead to the spark
2
plug "3" as shown.
Ignition checker:
90890-06754
Oppama pet–4000 spark checker:
YM-34487
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