1988 Johnson Evinrude "CC" 9.9 thru 30 Service Manual, P/N 507660, Page 318Get this manual
3Connect voltmeter positive lead to starter solenoid, starter lead terminalConnect voltmeter negative lead to starter motor terminalTurn key switch to start engine Voltage reading should not exceed .2 volt4 Connect voltmeter positive lead to battery negative lead common powerhead ground screw Connect voltmeter negative lead to battery negative post Turn key switch to start engine Voltage reading should not exceed .3 volt