On May 12, 11:47 am, Josh Assing wrote:
I have a alpha1 gen II outdrive.
As some of you know; I'm trying to reprop -- found a shop nearby that
rents demo props. They gave mea 15" prop (diameter) but I didn't try it as the
clearance between the prop blade edge and the cavetation plate was less than a
wire-coat hanger.

They said "it improves performance, use it anyway" My gut says that the
clearance is so small that it's begging for damage from a twig in the water.

Two people (one I consider knowledgeable and one from a shop I use regularly)
said "that's not enough clearance, should be about 10% of the prop diameter"

To me - -this sounds reasonable.

So; since the shop with the demo props doesn't want (for unknown reasons) to
give me a 14 or 14.5 diameter prop, I'm stuck with buying a new one; for that
reason; I'm looking to the NG for people that have "almost no clearance" between
the blade & the cavetation plate to see real-world experiences.

We're talking a SS prop. If I guy a prop; I'll probably go with aluminum 1st
(cheaper) while I experiement and then go SS once I settle on size & pitch &
blade count.

Thanks
-j

You might want to consider reducing your trial and error process time
by visiting the Michigan Wheel site and supplying the particulars of
your specific boat. That will let you know what Michigan Wheel would
recommend, and they likely know more about what prop is ideal for your
specific setup than even most knowledgeable prop shops.

http://www.miwheel.com/MIWheel/propit/main.htm