Quote:
Originally Posted by McGillicuddy
Jorge,
You prop appears to be an older Yamaha semi-cleaver
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That's exactly what it is, Jorge. The 17-M series props are the early Yamaha salt-water props, and provide as much stern lift at high RPMs as the Mercury Mirage. Their weakness is in a reduced rake progression on the outer 1/3 of the blade, which gives them great top-end performance, but weakening their mid-range performance. They run very well as a semi-surfacing prop for WOT/high-rpm performance, with slip ratios that can be down around 8%, but have higher 15%+ slip ratios at greater running depths, at mid-range RPMs.
__________________
Common Sense is learning from your mistakes. Wisdom is learning from the other guy's mistakes.
Fr. Frank says:
Jesus liked fishing, too. He even walked on water to get to the boat!
Currently without a SeaCraft 
(2) Pompano 12' fishing kayaks
'73 Cobia 18' prototype "Casting Skiff", 70hp Mercury