1993 Johnson Evinrude "ET" 60 thru 70 Service Manual, P/N 508284, Page 235Get this manual
4 DR4029
Starter System Voltage Drop TestAll Models
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
Connect voltmeter positive lead to battery positive postConnect 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 occur