1994 Johnson/Evinrude Outboards 40 thru 55 Service Manual, Page 289Get this manual
Running Test, Alternator OutputAll Models rJ Disconnect battery cables before proceeding with this N
check1Remove the rectifier red lead or rectifierregulator red lead from the terminal board2Wire 0-40 amp ammeter in series with the rectifier red lead or rectifierregulator red lead and the wiring harness red leadGuard against any red wire, its terminals, or the ammeter coming in contact with engine ground while the engine is runningContact could cause arcing
rv rv 3The engine'stestConnect the not be fully chargedrun the battery should when beginning this battery cables and