Does anyone know what brand of marine drives were put on the Cummins 6BTA in 1998. I thought I had "Twin Disc" brand but what is on my boat does not align with what I'm seeing in the manual. It's a simple thing but the oil drain plug is not where the drawing in the manual indicates where it should be. And regardless, I'll be damned if I can find a drain for the units I have.
4100 SCA Aft Cabin
Threaded Mode
