[Public-List] Hose Selection

[Rachel]

Hi Mike,
>
>
> The problem that I have seen (specifically with the A30) is that the  
> OD of the stern tube is smaller than the the OD of the stuffing box  
> (1-1/2") so you have 2 dimensions to deal with, in a single hose  
> which is only a few inches long, I do not know the answer to this.  
> Others on the list have dealt with this issue. I invite their  
> suggestions.

Here is how I took care of this problem (which does, indeed, exist -  
my original stuffing box hose was "gathered" around the smaller stern  
tube - not good).

My stuffing box was cast bronze, and the casting of the part that  
takes the hose was quite robust, and a bit irregular on the outside  
(just from casting).  So there was plenty of "meat."

I turned the hose part of the stuffing box down to 1-3/8" diameter.  I  
chose this size because it is an available hose size, and is about  
1/16" larger (or maybe even a bit less) than the stern tube outside  
diameter.  So this way the same hose (1-3/8") fit well around both the  
stuffing box and the stern tube.

I have photos of it if anyone would like to see it (although it is not  
that exciting - just a traditional stuffing box turned on a lathe).   
There was plenty of heft left on the turned portion.

This worked well and it all went back together great.

Now, as I mentioned, I was not able to find "real" stuffing box hose  
in that size (smallest: 1-1/2").  But unless you did drastic things to  
the stern tube, you would never be up in that ballpark.

With a short, small diameter hose, I felt very comfortable with high- 
quality wet-exhaust hose as a stuffing box hose.

Rachel
ex-#221



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