3052RE: [campernicholson] Stern Tube Cooling
- Jul 4, 2005The line may have been intended to provide additional cooling to the cutlass
bearing rather than the stuffing box. Are there any holes drilled through
from the outside of the shaft log into the cutlass itself? If not, the only
source of water is either your hose barb or back through from the shaft
[mailto:firstname.lastname@example.org] On Behalf Of Albert G. Boyce
Sent: Monday, July 04, 2005 1:03 PM
Subject: [campernicholson] Stern Tube Cooling
I have a 1976 model with a Perkins 4-108 and the hydraulic drive. There is
a small tube and hose that runs from the heat exchanger output to the stern
tube collar. The fitting on the collar was corroded when I purchased the
boat 6 years. A bronze hose barb was installed and that has now since
The yard that did the original replacement thought the line was intended to
aid in cooling the shaft. It seems to me that as long as the shaft drips as
it is rotating, this additional raw water would not be providing any cooling
that is not already being achieved be the seawater entering the stern tube
and dripping into the bilge.
I am wondering if this was a standard installation or something that one of
the previous owners has jury rigged. I am considering removing this entire
assembly and plugging the holes in the collar.
Any thoughts on this would be appreciated.
Discovery CN35 #132.
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