We are very sorry to hear of your engine situation. Failing EMMs is not a common occurrence. Often there are other causes for the multiple malfunctions such as overheating, loose or corroded connections, bad battery, reverse polarity, etc. It is recommended that you have an authorized Evinrude dealer check over and determine the reason for the 2nd failure and to call dealer support to see if any consideration could be extended to you.
You may also email the engine serial number, your contact information, and your dealer to firstname.lastname@example.org . They cannot do anything until it has been examined by a trained technician.
"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.