Yamaha F225A Service Manual page 319

Sparking ignition coil procedure:
A voltage is applied to the ignition coil of the selected cylinder, a spark is created in the spark gap
tester, and then the ignition system is checked. Five sparks are created within five seconds.
WARNING
• Do not touch any connections of the spark gap tester lead wires.
• Do not let sparks leak out of the removed spark plug cap.
• Keep flammable gas or liquids away since this test will produce sparks.
1. Select the test that you wish to perform by either clicking it or pressing the up or down arrow
keys on your keyboard. (Fig. 22)
NOTE:
• Make sure that the engine is not running.
• The selected item is highlighted in light blue.
• The details of the selected test are displayed in the column on the right, and the items that must
be either checked or performed before the test can start are displayed below the table.
• Only one item can be selected at one time.
• A special tool (spark gap tester 90890-06754) is needed.
2. Connect the spark plug cap of the cylinder that will be tested to the spark gap tester.
Spark gap tester
90890-06754
3. Set the spark gap length on the adjusting knob.
Ignition spark gap: 9 mm (0.4 in)
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Fig. 23
4. Select the cylinder number where the spark gap tester is connected, and then click the Select
button or press the Enter key on your keyboard. (Fig. 22)
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