Over the years several people on this site recommend an original service manual. So I went on Ebay and purchased a 1984 OMC Service manual. While working on the outdrive these past few weeks, I found myself referring back to my Clymer manual. I am not impressed with the original manual. The printing is real small and the pictures are terrible . Maybe I have just gotten use to the Clymer manual over the past 25 years. When comparing the two manuals I don't see any information missing from the Clymer