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Well done you.

The Honda BF 90 and Yamaha F90 have different gear ratios and WOT rpm ranges. The prop suggestions above are not applicable.

For a Montauk 17 with an F90, owners have tested and recommended these props:

13-1/3 x 18 Yamaha Talon (Performance)
13 x 19 Yamaha Painted SS
13 x 19 Powertech SCD
13.25 x 17” Stiletto Advantage

Engine needs to be mounted 2 holes up, top bolt in the 3rd hole down from the top.

I would get through break in before you start noting performance.

Your target should be 5800-6000 at 43-44 mph running solo and light.