2004 SR Johnson 2 Stroke 9.9, 15, 25, 30 HP Outboards Service Manual, Page 97Get this manual
ELECTRICAL ELECTRIC STARTER TESTS
Voltage Drop Tests
WARNING
Remove voltmeter positive (+) lead from starter solenoid and stop cranking engine
Avoid accidental starting while testing; twist and remove all spark plug leadsSTEP Connect voltmeter positive (+) lead to battery positive (+) postConnect voltmeter negative (-) lead to starter solenoid positive (+) terminalTurn key switch to START to crank engine Voltage reading must not be more than 0.3 volt
DRC4030
STEP Connect voltmeter positive (+) lead to starter solenoid, starter lead terminalConnect voltmeter negative (-) lead to starter motor terminalTurn key switch to START Voltage reading must not be more than 0.2 V