Frogwatch wrote:
On Sep 3, 10:02 am, Frogwatch wrote:
On Sep 3, 7:15 am, (Richard Casady) wrote:

On Wed, 2 Sep 2009 20:03:04 -0700 (PDT), Frogwatch
wrote:
Today, I dug out the old bronze prop whose blade edges were so
depleted of zinc
What kind of bronze contains zinc? Brasses are copper/zinc alloys,
bronzes are mostly copper/tin. Disappearing zinc is why brass is not
used in many applications.
Casady
OK. 'twas a late night brain freeze but the bronze is wasted and
corroded somehow.

Actually, marine bronze contains 9-10% aluminum which is even worse
than Zn. I do not have shore power so I can only assume someone else
has bad wiring. Right now, I am combatting this by having the diver
replace my zinc every 4 months but I will move my boat soon.
So, what do people think about my making the strut?
HK, you are incapable of giving useful input so please do not respond
I think you are probably capable of casting a strut but why bother? What
would a new one cost, $100 maybe. Chances are that there is an off the
shelf strut that fits your boat.
When you take the strut off you might find you need a bearing and shaft
too. And an engine coupler. And a new prop. And thru hulls. And
seacocks. And bottom scraping and painting. And blister repair. And
keel faring. And engine allignment. And bonding for thru hulls, strut,
and shaft.
Doing those kinds of repairs would be a waste of your time and talent.