First things first, you should be posting in the Owner's Zone for better visibility.
Since you have no problems commnunicating and you can get spark statically while testing, crank the engine over with Evinrude Diagnostics connected and see if you are getting RPM indication on the "Monitor" page. If you aren't, then you may have a crank position sensor problem (highly unlikely but it's easy to check). I also recommend setting up a membership at etecownersgroup.com and posting in the I2 section. Lot's of good helpful folks over there.
Multiple inquiries are not needed on this site.
"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.