Detroit 8V92 (pre 2000) to Cat 3196 (2000 - 2001) to Cummins QSM11 (post 2001) in the 48-foot and 50 foot sedan bridges. There are some overlap in the years but this is generally how it came down.Maybe just the engine Sea Ray started using after Brunswick created Cummins/Mercruiser Diesel.... and ditched the Cats. Implies a later year 48DB, I guess, not one of the earlier ones with Cats.
-Chris