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Old 02-24-2017, 12:12 PM   #3
sdowney717
Guru
 
City: Seaford Va on Poquoson River, VA
Vessel Name: Old Glory
Vessel Model: 1970 Egg Harbor 37 extended salon model
Join Date: Jan 2016
Posts: 2,264
Quote:
Originally Posted by North Baltic sea View Post
Beautiful bronzsmith's work and great teaching skills, there is no need to buy and sometimes is not even for sale.
Thanks very much, this took me a few days to make.
You definitely can't buy this part anymore, Palmer closed back in the late 1970's.
This part fits between the water cooled exhaust manifold and the riser. The riser is clamped onto the round hub, other end bolts to exhaust manifold.
It won't get excessively hot enough to weaken the bronze.
The riser and exhaust manifold are FWC.

I modified the Barr riser #20.0000 to include it into the closed cooling circuit.
I brazed on a bronze pipe to the riser's end and plugged its outflow, redirected the cooling flow out through a core plug.

That bronze pipe since 2000 is like brand new, hot salt water and exhaust gas has caused no damage.

Back when I bought the boat, and had to get 4 new risers for $1000, I thought up the way to make them last. Been 16 years now working in salt water and no problems with them.
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