The letters EE in your model number signify that the motor is a 1999.
A company has advertised that they can repair the fuel pumps on the Evinrude built 9.9-15 HP 4-strokes.
"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.
As long as your base is good, this is how i modified a fuel pump on a 9.9 Evinrude 4 stroke using a 2 stroke fuel pump.
Here is a link showing how I converted the fuel pump and a short video of it running after the conversion.
Hopefully, this will help.