I think you mean the codes are not explained in the operator's guide that you received with the motor.
The factory service manual and the Evinrude diagnostic software for your motor contain that information about fault codes.
If you have the 4.3 or 7.0 digital display, I believe the codes come up on the screen if they are activated.
With today's emission regulations, modern low emission engines of all makes are now computer controlled and require laptops or specialized equipment and extensive training to service and maintain. They are not like your grandfather's motor that could be fixed with only a screwdriver and an adjustable wrench.
"There is never just one thing wrong with a boat";
-- Travis McGee, main character in a book series by John D. McDonald
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The factory recommends that a properly trained technician service your Johnson or Evinrude outboard motor. Should you elect to perform repairs yourself, use caution, common sense, and observe safety procedures in the vicinity of flammable liquids, around moving parts, near high-temperature components, and working with electrical or ignition systems.
The information offered here is only general in nature and should not be construed as complete factory approved procedures, techniques, or specifications. Always use the proper service manual for your motor, up-to-date service literature, the correct tools, and have an understanding of how to proceed with troubleshooting and repair methods. If you are unsure or uncomfortable with a procedure, a situation, or a technique, enlist the services of a factory trained technician.
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