1988 Johnson/Evinrude "CC" 40 thru 55 Models Service Manual, Page 262Get this manual
IfJl-191 73228
3 Connect voltmeter positive lead to starter solenoid, starter lead terminalConnect voltmeter negative lead to starter motor terminalTurn key switch to start engineVoltage reading should not exceed 0.2 volt4 Connect voltmeter positive lead to battery negative lead common power head ground screw Connect voltmeter negative lead to battery negative postTurn key switch to start engineVoltage reading should not exceed 0.3 volt