I started doing the research on this and discovered that my assumption was completely wrong. Late last fall I blogged about several projects that would be prudent to accomplish while the engine was off the beds. I detailed the fact that my hose was the exhaust-type wire-reenforced hose that we connect to our exhaust elbows and water-lift mufflers. Therefore, it was prudent to change this hose periodically, as with age the hose will distort, the wire will rust, and eventually a leak will develop.
My hose has not leaked. Yet. But it was just a matter of time. Look at the end of the hose in this photo:
So I did a search on this hose application, and was led to a website I knew about, but didn’t realized the author addressed this problem. http://www.pbase.com/mainecruising/boat_projects. He gives extensive photos and discussion of this type hose used in this application, and identifies the correct type of hose. Check out this link: http://www.pbase.com/mainecruising/stuffing_box.
Mainsail specifies a stuffing box hose made especially for this application by Buck Algonquin. It’s a 5-ply hose that has no wire reenforcement, and therefore can’t rust or be perforated by a rusting core. Cost? My hose is 1.75″ inside diameter and is $18.08 per foot from Jamestown Distributors. it costs a little more, but I only need one foot of it.
*** Correction*** I received this piece of hose yesterday (3/26) from JD, and it’s actually about 5 inches long. So that’s $18.08 for a 5 inch length of 1.75″ (ID) 5-ply hose. Lucky for me, that’s all I need. The old piece was about 6″ long, and I was contemplating making the new piece shorter – now there is no decision to make!
So go look at your stuffing box hose, and next time you replace it get the Buck Algonquin and keep the ocean out of your boat.