I tried asking this by attaching to an older thread, But I thought I would start a new thread and ask here.
I am running a 21 pitch prop at 5950 rpm and 46.3 MPH.
If you use 2.0 gear ratio thats a slip of 21%
I read in another thread where Huey Posted Model# A115SHLAF has a 2.36 gear ratio
I was wondering if that would be the same for the graphite engine?
This would make my prop slip 8% which would be great. My dealer is shocked I can run a 21 pitch. His literature says 2.0 gears also.
06-19-2017 04:52 - edited 06-19-2017 04:59
Look on the serial number tag on the motor for the complete model number, there is one more letter needed. If the final letter is " B " or higher, then you have the 11:26 - 0.42 - 2.36:1 gear ratio.
Ask your dealer to refer to service bulletin dated January 2014, number 2014-01(S)
"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.