I was changing the gear oil in my lower unit and noticed that the drain plug didn't have a washer/gasket/seal other than the bevels in the plug itself. The top plug did. Is this normal or do I need to fit an o-ring or some such? The parts diagram in the manual does not show it.
The old oil was free of water so it must have been holding (unless I dropped the seal on my driveway and didn't see it).
The old oil was free of water so it must have been holding (unless I dropped the seal on my driveway and didn't see it).
