1998 Johnson Evinrude "EC" 25, 35 HP 3-Cylinder Outboards Service Manual, Page 223Get this manual
No Load Current Draw, Electric Starter
INote Securely fasten
starter in vise or other suitable fixture before proceeding with this check1Locate battery rated at 500 CCA (60 amp-hrl or higher that is in good condition and fully charged
2Connect 0-100 amp ammeter in series with heavy jumper between the battery "+" terminal and the starter "+" terminal
3Attach or hold vibration tachometer, such as Frahm Reed tachometer, to the starter