1991 Johnson/Evinrude Models "EI" 40 thru 55 Service Manual, Page 267Get this manual
Starter System Voltage Drop Test By making systematic check of the starter system, any component or electrical connection having excessive resistance can be located
i and remove all spark plug leads
'" Avoid accidental starting of engine while servicing; twist
Clean and retighten, or replace, any connection, cable, or component having greater than specified voltage drop
EI Connect voltmeter negative lead to starter solenoid positive
terminalTurn key switch to START to crank engineVoltage reading should not exceed 0.3 voltIn Step 2, connect the voltmeter leads only while the engine is cranking, or damage to the voltmeter can occurf712Connect voltmeter negative lead to the starter side of the