Semi-interesting discussion. But, essentially meaningless because propeller
selection is impossible to pinpoint except through trial and error. Any
number of computer programs can select the "perfect" prop for your boat
engine combination except they won't except by luck. They'll get you close
but perfection is only acheived by trial and error. Furthermore, the
perfect prop for one set of conditions will not be the perfect prop for all.

Do you want perfect hole shot performance? One prop. Do you want maximum
speed? A different prop. Do you want optimum economy at lowest RPM? Yet
another prop. Whatever prop you choose will be a compromise and provide
perfect performance for only one, if any, operating condition. All we can
do is strive for a prop that provides good all around performance and
economy.

As to the original question from the OP.... as Clams pointed out, it's about
enertia.

Butch
"jamesgangnc" wrote in message
nk.net...
The pressure created by the prop pushing the boat is orders of magnitude
greater than anything you could attribute to spinning the weight of the
prop. The different between aluminum and ss would not be noticable.

"Josh Assing" wrote in message
...
I purchased 2 props (both alumininum) to reprop with.
The guy agreed with me that if I hit stuff; it's better to destroy the
prop than
the outsdrive -- but for performance, a ss is the way to go.

he said the weight issue is silly because it's underwater and doesn't
weigh as
much and that no one would use ss if it wore out the outdrive faster.

So -- Here I am; for curiosity sake; asking you if the weight of a ss
prop
really does wear out the drive faster than an aluminum one.

-j