Spark Plug; Spark Plug Cap (With Resister) - Yamaha F4 Service Manual

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IGNITION SYSTEM
Ignitor ass'y coil resistance:
Secondary coil: 11.6 ~ 17.4 k½
Measuring steps:
8 Connect the pocket tester (k½x1) to
the ignitor ass'y lead.
Secondary:
Tester (+) lead ® White lead
Tester (-) lead ® High-tension cord

SPARK PLUG

Refer to "GENERAL" in chapter 3.

SPARK PLUG CAP (WITH RESISTER)

1. Inspect:
9 Spark plug cap
Loose ® Tighten.
Cracks/damage ® Replace.
2. Remove:
9 Spark plug cap
3. Measure:
9 Spark plug cap resistance
Out of specification ® Replace.
Spark plug cap resistance:
With resister type
4.0 ~ 6.0 k½
Replacement steps:
(resister type)
8 To remove the spark plug cap turn it
counter clockwise.
8 To install the spark plug cap turn it
clockwise until it is tight.
8-8
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