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Old 07-10-2013, 01:15 PM
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Thrall Thrall is offline
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Join Date: Jul 2004
Boat: '06 X2 MCX
Location: Eagle River, AK!
Posts: 3,782
The Yanmar has considerably less torque than the Dmax so not a good comparison.
I've seen 19.5 pitch props on the Lsa x45.
Jumping from 17.5 to 20 pitch should give you a few more mph at least.
Not sure how limited in dia the x80 is but I think much over 20" pitch on a 14" ish prop and you won't have enough surface area to take full advantage of the added pitch.

Very interesting awesome project. Keep up the good work.
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