Seloc manuals are good, however, they cover different years in the same manual. Mine did and it was confusing at times. Try an Evinrude dealer and get the specific year. Hope this helps.
I am not a professional mechanic, as are so many here. I have rebuilt a couple of small outboard motors, which I depend upon from time to time.
The Seloc manuals are of no use whatsoever to the amateur. Find the original OMC service manuals. They can be found pretty easily on eBay.