Has this engine been serviced by approved E-TEC dealer lately?
There were some updates to your model oil pump back in the days, allthough if pump was ever changed, it would be superseded to a new impoved design.
Dealer is needed to upgrade EMM in both cases.
In 2008 Evinrude changed the oil pump design to eliminate the false code 38 NO OIL warnings.
Your dealer can find the information about the new oil pump kit in the 2008 Service Update Book
40 – 90 HP Models, 2007 and Older
What's different: Service oil pump assembly does not use an oil pressure feedback
switch, and a requires an engine management software update.
Why: Two new kits have been developed to reduce false Code 38 faults.
• 40 – 60 HP models, P/N 5007476.
• 75 – 90 HP models, P/N 5007477.
Kit contents: Oil pump and manifold assembly, replacement seal, new clamp
and software CD.
IMPORTANT: The Inline Engine Oil System Service Update software provided
with these kits (InlineOilUpdate.exe) MUST be installed with the new oil manifold.
"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.