1992 Johnson Evinrude "EN" 60 thru 70 Service Manual, P/N 508144, Page 328Get this manual
Motor Test, No Load Note fa.sten motor in suitable fixt ure before proceedIng with this test
1Use battery rated at 360 cold cranking amps or higher hat is in good condition and fully charged to perform this test2Connect 0-50 amp ammeter in series with the battery's terminal, ammeter RED lead toward terminal
3Attach or hold vibration or mechanical tachometer to the motor while performing this test4Monitor motor RPM and current drawRefer to the chart below for the correct specifications for your motor
5Viewed from the pump end, the motor shaft must rotate in clockwise direction when battery+" is applied to the BLUE lead