I document here what I have encountered, so that I can go back and read my own writings if something pops up years later.For these outboard motor repair articles, I DO NOT try to give the reader a documented list of parts needed for a conversion, (as this could be different because of running changes made even within the same models), but do try to document what differences I have encountered and tricks I have learned, many of which are not listed in service manuals.These articles are put together from actual experiences over a 50 years, mainly because my memory is not anywhere as good as my wife's.I am not a marine mechanic, but have been an outboarder and have done my own repairs all my life and have been a machinist forever.Both brands of motors then came from the same plant after that.Evinrude was usually painted a blue color of some sorts, while Johnson was initially green until 1977 and then again white.OMC apparently learned something on the 9.5, as the 9.9 is basically a It has been noted that since I have started these articles and have gotten many e-mails from all over the world that other country's motors may not be exact to what we see in the United States.
This higher RPM is achievable by using a different carburetor which uses a larger throat, which gains a higher fuel/air mix.
Late 1990's they both were either black, white or a blue gray depending on the year.
OMC filed for chapter 11 bankruptcy and in October 2001, Bombardier Corp.
However Evinrude had a 10 hp designation on some of the later ones from about 1990 or so.
Same motor, but they apparently just changed the stated rating for advertising purposes.