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Tedious,
From what I've seen on the Yamaha prop app chart, there are only 2 Yamaha 13 pitch props listed for my gear case (4.25inch) and HP.
One is an aluminum 13-5/8 diam., the other is SS specified as a Pontoon Performance Series 14 inch diam. Not that I'm opposed to non Yamaha products, but I'm not sure if your recommended 13 prop would be a top end [both rpm and top speed] limiter on a BW 17ft hull.
As stated above, we're likely a bit under 1800 lbs.; less frequently, add bait tank and ice chest and we might be 1900 lbs.
Based on Yamaha Performance Bulletins for the F70, the closest comparables in other hulls [for general comparison] are:
Carolina Skiff 17-9: http://www.yamahaoutboards.com/sites/...14_SKF.pdf
KeyWest 17-4: http://www.yamahaoutboards.com/sites/...b6.tmp.pdf
Sundance 17-10 [this hull is specd as 7ft10inch beam?]: http://www.yamahaoutboards.com/sites/...09_skf.pdf

In the above cases, they were equipped with the standard Yamaha issue 13.5 x 15 aluminum prop and were able to achieve min 36mph and 6300 rpm.
Also, in the case of your recommended 13 vs. my stock alum. 15 is about a 13% pitch reduction with a corresponding 2% diameter increase.
I'm far from competent on propeller knowledge, but it seems at minimum I would want to stay with current 13.5 x 15 but go to SS.
Apparently I'm missing quite a bit.