3 weeks ago - last edited 2 weeks ago
3 weeks ago
If you lost rpm, one thing to check on a 115 hp is the exhaust tuning valve operation. Because your motor only turned the bare minimum to rpm, it is possible that carbon buildup could have caused the
valve to stick closed or something not actuating the vavle when needed.Y
Your engine may run better if set up for about 5800 or so plus if you run a majority of slower speeds give a motor a few bursts of WOT before ending the day to exercise the valve.
Other items can also affect top rpm and if not the valve, then your dealer needs to troubleshoot the motor.
"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.