Thanks!

I know about the differences between ss and alum
I know in the past, I've seen not much difference between AL and SS when engines
are low in HP. It wasn't so much the material; bu the fact that two different
props existed.

If it were me; I'd have an alum to "experiment" with and then once figured out;
go SS for the longevity....

I'll stick with the current prop & go from there.

Cheers!
-josh

On Thu, 26 Oct 2006 00:28:50 GMT, Short Wave Sportfishing
wrote:

On Wed, 25 Oct 2006 15:31:30 -0700, Josh Assing
wrote:

I'm looking for suggestions, knowing there can be no science or hard answers....

350 ci Carb'd engine
23' cuddy cabin boat
4100lbs

Current prop is a SS 14x19
Old prop (I'm assuming, becuase it was on teh boat) is alum 14x17

I don't know the WOT RPM as the outdrive is currently off; but want to get an
approximate or good starting prop for 1st sea trial.

I heard the current SS prop was hard to get up on a plane, had to be going
fairly fast, and once on plane, dropping off the throttle, it'd drop back off
plane.

Discussion, suggestion, etc is appreciated.

Start with the 14x19 and go from there. A two step increase/decrease
is a pretty common circumstance and usually done to maintain both
cruising and WOT rpms.

Stainless props flex less than aluminum, generally have a longer life
and considerably more hydrodynamic efficiency derived from the stiffer
blades. They are easily repaired, but the repairs can be expensive.
Less than a new prop though.

Aluminum props are relatively low in cost, have good strength, good
corrosion resistance and are easily repaired. On the other hand, they
are easily damaged, suffer a lot of dings and what not and can suffer
from electrolysis problems.

I'm not sure where the dropping off throttle drops plane comes from.
Once the boat is on plane, backing off the throttle doesn't affect
much at all other than efficiency. Doesn't have much to do with the
material the prop is made of.

If it were me, I'd just leave the SS prop on it and try that first,
then play with other props if you aren't satisfied.


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