1996 Johnson Evinrude "ED" 90 CV 88 thru 115 Service Manual, P/N 507126, Page 240Get this manual
Running Test, Alternator Output
INote Disconnect
battery cables before proceeding with this
1Remove the rectifier red lead from the terminal board or the rectifierregulator red lead from the battery side of the starter solenoid2Wire 0-40 amp ammeter in series with the rectifier red lead and the wiring harness red lead or in series with the rectifier regulator red lead and the battery side of the starter solenoid
1500 2500 3500 4500 5500
Guard against any red wire, its terminals, or the ammeter coming in contact with engine ground while the engine is runningContact can cause arcing
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