I'm looking for advice on this; when I bring the motor up or down through the RPM range during operation there is a range of about 2000-2500 RPM where I have expereinced occasional "coughing" of the motor that results in Exhaust Temp Fault 134 and the motor will immediately go to idle mode and RPM. I shut down the engine, restart to clear the code and then resume normal operation. When I bring the engine up quickly through this range I have no issue. It's only when I'm slowly accelerating or decelerating. I watch motor temperatures likes a hawk and everything is within normal operating ranges and the motor operates fine otherwise. I've learned to "work around" this, but this is not what I want from this engine.....
Your dealer should be aware of the situation and can check your motor over and either update what is needed or check if the sensor is acting up
"There is never just one thing wrong with a boat";
-- Travis McGee, main character in a book series by John D. McDonald
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.