1998 Johnson Evinrude "EC" 25, 35 HP 3-Cylinder Outboards Service Manual, Page 273Get this manual
Motor TestNo Load
Securely fasten motor in suitable fixture before proceeding with this test1Use battery rated at 360 cold cranking amps or higher that is in good condition and fully charged to perform this test
2Connect 0-25 amp ammeter in series with the battery's terminal, ammeter red lead toward terminalmotor while performing this test
3Attach or hold vibration or mechanical tachometer to the 4Monitor motor RPM and current drawRefer to the chart below
for the correct specifications for your motorDR4238