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

"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.

It's not the weight per-se, it's the inertia of the static ss propeller mass
when you shift into gear from neutral that wears the dogs a little faster
than aluminum. Once it's actually spinning all is pretty much equel.

-W

Clams Canino wrote:
"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.

It's not the weight per-se, it's the inertia of the static ss propeller mass
when you shift into gear from neutral that wears the dogs a little faster
than aluminum. Once it's actually spinning all is pretty much equel.

-W


Another argument to choose Volvo-Penta Over Mercruiser.

Rob

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

fwiw ... I was advised by the dealer to step down in pitch e.g. 23" to
21" when going from aluminum to SS. Never looked into it further, but
a step down would imo reduce stress on the outdrive.

"bowgus" wrote in message
ps.com...

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

fwiw ... I was advised by the dealer to step down in pitch e.g. 23" to
21" when going from aluminum to SS. Never looked into it further, but
a step down would imo reduce stress on the outdrive.


Odd.... because WOT RPM's actually rise a bit going to SS.

-W

The reason for the step-down recommendation is because the aluminum flexes
and looses some pitch. Stainless does not.

--
Steve Barker

for the spam bots:






"bowgus" wrote in message
ps.com...

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

fwiw ... I was advised by the dealer to step down in pitch e.g. 23" to
21" when going from aluminum to SS. Never looked into it further, but
a step down would imo reduce stress on the outdrive.

"Steve Barker" wrote in message
...
The reason for the step-down recommendation is because the aluminum flexes
and looses some pitch. Stainless does not.


Stainless props also typically have a more pronounced cup to them, which is
another good reason the drop in pitch is usually warranted when moving from
aluminum to stainless.

Steve Barker wrote:
The reason for the step-down recommendation is because the aluminum flexes

Prove it.

Rob

and looses some pitch. Stainless does not.

HEY I am merely the messenger. That's what the leading prop rebuilder in
the US told me 15 years ago. I have no reason to doubt him.

--
Steve Barker

for the spam bots:






"trainfan1" wrote in message
et...
Steve Barker wrote:
The reason for the step-down recommendation is because the aluminum
flexes

Prove it.

Rob

and looses some pitch. Stainless does not.

Steve Barker wrote:
HEY I am merely the messenger. That's what the leading prop rebuilder in
the US told me 15 years ago. I have no reason to doubt him.


It's an old wives's tale.

Try to duplicate your aluminum prop "flexing" in your shop and report
back with the results.

AND, there is always a prop rebuilder better than your guy. Or my guy.
"Leading prop rebuilder" is a pretty brash & open-ended statement.

Rob