Home › Forum › Ask A Member › 9.9/15 Seal Orientation › Re: 9.9/15 Seal Orientation
Just reviewed a few manuals again….The 1990 6-8hp manual prescribes pressing both seals into the housing with the lips facing up toward the powerhead…
The 1992 and 1998 9.9-15hp manuals prescribe pressing the lower/small seal with its lip facing up, but prescribes pressing the larger seal into the housing with its lip facing down…So, the seal lips would face toward each other… I don’t have a mid 80s svc manual, so not sure what was prescribed during that period.
I certainly agree that the small seal should have its lip facing up toward the powerhead so the driveshaft will not catch on the lip during gearcase installation….And, I guess you could argue both ways for the larger seal, and it seems like OMC had a few different methods depending on engine family…