I recently purchased a new portable fuel tank for my 90hp E-Tec, a E90DSLAA purchased new in 2013. Since this is a new style tank that is the sealed type to meet EPA requirements, the tank pressure can build up to 5psi. The tank manufacturer suggests a fuel demand valve to prevent engine flooding and fuel spillage. Is a fuel demand valve really necessary for an E-tec or can it deal with the 5psi "backflow" of fuel?
Evinrude has its own fuel demand valve. It is your choice whether to have one installed or not.
"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.
Thanks for the reply Bill. I was wondering if Evinrude has guidance or specification on this topic but I guess if there are no problems with leaking I'll leave everything as-is for now.