2004 SR Johnson 2 Stroke 9.9, 15, 25, 30 HP Outboards Service Manual, Page 91Get this manual
ELECTRICAL ELECTRIC STARTER TESTS
ELECTRIC STARTER TESTS
Start Switch Test
Disconnect the two starter switch leadsConnect ohmmeter between switch leadsActivate switchMeter must indicate resistance as follows: Low resistance reading when switch is pressed High resistance reading when switch is releasedReplace the start switch if test results are not correct
STEP Move the voltmeter red lead to the start switch connectionCheck the voltage between the start switch connection and rectifier terminal If the voltmeter shows 12 V, go to STEP If the voltmeter shows V, test the positive (+) battery cableSTEP Move the voltmeter black lead to powerhead groundCheck the voltage between the start switch connection and powerhead ground If the voltmeter shows 12 V, go to STEP If the voltmeter shows V, clean and tighten the rectifier terminal screwSTEPS Move the voltmeter red lead to the start switch output leadPush the start buttonCheck the voltage between the start switch output lead and powerhead ground If the voltmeter shows 12 V, go to STEP If the voltmeter shows V, check the start switch, start switch wires and start switch connectionSTEP Remove voltmeter red and black leadsConnect the start switch output lead to the starter terminalPush the start buttonCheck for correct operation of the starter If the starter runs, check the condition of the pinion If the starter does not run, service the starterRefer to ELECTRIC STARTER SERVICING on p.100