SailNet Community banner
1 - 11 of 11 Posts

·
Registered
Joined
·
163 Posts
Discussion Starter · #1 · (Edited)
I have a 1971 Ericson 32 that I am getting ready to put in the water. I bought it part way through a restoration and the previous owner had several things taken apart. It looks like he replaced the stuffing box and hose as they both look new (shiny brass and fresh looking hose.) He said the packing that he got was wrong. It looks to be 3/8 but tough to tell. He never put the nut back on because he said with three wrappings it didn't have enough threads to put the nut back on. I got on an Ericson specific forum and they said to use 1/4" packing which is what I ordered (GTU.) When I put the packing inside the nut and it appears to be undersized. There would be a bit of a gap around the shaft. My real questions is, should there be a slight gap (1/16 ish) and does the packing compress when you tighten it and fill this gap? If you couldn't tell, I am new to boats with an inboard so I have never had to deal with this before. Is the gap intentional to allow the adjustment of the seal? Should it be snug from the get go without being compressed?
 

·
Registered
Joined
·
7,861 Posts
The packing should fill the gap between the shaft and stuffing box. If the po replaced the stuffing box it could well be larger than original.
 

·
Registered
Joined
·
163 Posts
Discussion Starter · #4 ·
Thanks for the replies. I was pretty sure I needed something like 5/16. Just wanted to make sure.
 

·
Registered
Joined
·
163 Posts
Discussion Starter · #5 ·
Here is a picture of the packing. In there now is 1/4". What do you think, 5/16" should cover it?

<center><a href="http://www.use.com/ERICSON_116405f59ff46d94b92b" target="_blank"><img border="0" src="http://media.use.com/images/s_2/116405f59ff46d94b92b.jpg"></a><br>
<a href="http://www.use.com/ERICSON_116405f59ff46d94b92b" target="_blank"><img src="http://www.use.com/images/clicklarge3.gif" border="0"></a></center>
 

·
Registered
Joined
·
5,197 Posts
Looks about right. Best would be a measurement with the shaft in place. Note you do have some leeway as the packing is designed to compress.
 

·
Registered
Joined
·
163 Posts
Discussion Starter · #7 ·
I'd love to measure it with the shaft in place but it is almost inaccessible. I can barely see it and have a difficult time even reaching it. Very poor design as far as engine access is concerned. I think I'll be pretty darn close with 5/16".
 

·
Tartan 27' owner
Joined
·
5,241 Posts
My real questions is, should there be a slight gap (1/16 ish) and does the packing compress when you tighten it and fill this gap? If you couldn't tell, I am new to boats with an inboard so I have never had to deal with this before.
Is the gap intentional to allow the adjustment of the seal? Should it be snug from the get go without being compressed?
The packing should not be snug or at all difficult to load into the packing nut. When the nut is tightened it compresses the packing so it fills the space in there.

Last time I re-packed our stuffing box I got 1/4" packing for our 1" shaft set up. I thought that was the size I had used in the past. It was a very tight fit and I had to cram it in there. Once in the water I noticed that the stuffing box was warm to the touch with the shaft turning - indicating too much friction. I decided to replace the 1/4" packing with 3/16" and it has worked just fine.
 
1 - 11 of 11 Posts
Top