1994 Johnson/Evinrude "ER" 60 thru 70 outboards Service Manual, Page 275Get this manual
Motor Test, No Load INotel
fa.sten motor in suitable fixture before proceedwith th IS test
1Use battery rated at 360 CCA (50 amp hrs) or higherThe battery must be fully chargedRefer to Battery Specifications, Electrical Section2Connect 0-50 amp ammeter in series with the battery's terminal, ammeter RED lead toward batterymotor while performing this test
Gl3Attach or hold vibration or mechanical tachometer to the Gl4Monitor motor RPM and current drawRefer to the chart below for the correct specifications for your motor