DejaWiz reported: almost everything internally is the exact same, aside from the ECM, which has a special software program mapping between the common and VMax.
F90XB outboard motor? Marrinas is your trusted Yamaha https://anniemfke995143.ageeksblog.com/28993964/helping-the-others-realize-the-advantages-of-yamaha-90-hp-for-saltwater-use