1995 Johnson Evinrude "EO" 9.9 thru 30, 2-Cylinder Service Manual, P/N 503146, Page 317Get this manual
Running Test, Alternator Output
INote Disconnect
battery cables before proceeding with this
1Disconnect the rectifier red lead2Wire 0-40 amp ammeter in series with the rectifier red lead and the wiring harness red lead
llllffifttl[ I1000 2000 3000 4000 5000 6000
& Guard against any red wire, its terminals, or the ammeter
3The engine's battery should not be fully charged when beginning this testConnect the battery cables and run the engine in test tankRefer to the output curves to determine the correct output-to-RPM ratio for your engine If there is no output or the output is not correct, refer to the stator and rectifier ohmmeter tests in this section