Reply
 
Thread Tools Search this Thread Display Modes
 
Old 09-26-2022, 08:14 PM   #1
Guru
 
Marco Flamingo's Avatar
 
City: Dewatto
Vessel Name: CHiTON
Vessel Model: Tung Hwa Clipper 30
Join Date: Jan 2020
Posts: 870
DIY stuffing box spray shield

I noticed that I have a scum stripe in my bilge in line with the drip from my stuffing box. The wood underneath the engine room decking (removed for the picture) had been soaked with salt spray over the years, as apparently was the surrounding area. The shaft coupling was just wire brushed and repainted because of the heavy rust.

It might only be a cosmetic issue, but I decided to reduce the area that might be subject to salt spray. I cut the bottom off of a little plastic bucket (old drywall spackle), made a hole and a slit for the shaft and two holes for the packing gland bolts. It is just a jam fit, easily removed when it comes time to repack the stuffing box.
Attached Thumbnails
101_0001.jpg   101_0003.jpg  
__________________
Marco Flamingo
Marco Flamingo is offline   Reply With Quote
Old 09-26-2022, 08:28 PM   #2
Guru
 
C lectric's Avatar
 
City: Gibsons, B.C., Canada
Vessel Name: Island Pride
Vessel Model: Palmer 32'
Join Date: Oct 2007
Posts: 4,032
Well done.
I have suggested covering the shaft/stuffing box interface many times to catch and stop the spray which will travel damaging wood but worse, rusting any nearby steel parts including the engine back, the engine mounts, the gear box, corroding wire connections and so on.
C lectric is offline   Reply With Quote
Old 09-26-2022, 08:54 PM   #3
Moderator Emeritus
 
Comodave's Avatar
 
City: Au Gres, MI
Vessel Name: Black Dog
Vessel Model: Formula 41PC
Join Date: Jul 2015
Posts: 17,490
We had those stuffing boxes in our last boat. Why not move to a packing like Duramax and get rid of the dripping all together?
__________________
Boat Nut:
If you are one there is no explanation necessary.
If you arenít one, there is no explanation possible.
Comodave is offline   Reply With Quote
Old 09-27-2022, 10:00 AM   #4
Guru
 
C lectric's Avatar
 
City: Gibsons, B.C., Canada
Vessel Name: Island Pride
Vessel Model: Palmer 32'
Join Date: Oct 2007
Posts: 4,032
Even though I use the Gortex GFO packing I still cover the actual interface between the stuffing box and the shaft.

I do not tighten so far as to stop all leaking but very close. It takes many running hours to get any bilge buildup.

The cover prevents the spray from even that tiny weepage from travelling around the engine compartment to cause rusting of nearby components.

I still suggest a cover even with these near miracle packings. Once rusting starts it is not easily stopped.
C lectric is offline   Reply With Quote
Old 09-27-2022, 10:17 AM   #5
Guru
 
Moonfish's Avatar


 
City: Port Townsend, WA
Vessel Name: Traveler
Vessel Model: Cheoy Lee 46 LRC
Join Date: Nov 2011
Posts: 1,449
Nice idea!
__________________
Darren
Port Townsend, WA
m/v Traveler - '79 Cheoy Lee 46 LRC
https://www.pacificnwboatertested.com
Moonfish is offline   Reply With Quote
Old 09-28-2022, 10:10 AM   #6
Senior Member
 
Tator's Avatar
 
City: Bainbridge Island/Petersburg Alaska
Vessel Name: Oz
Vessel Model: Bluewater 40' RPH 1979
Join Date: Feb 2015
Posts: 464
I use a plastic bottle such as a 1qt or larger size with with the pour end cut off, a split up the side to a hole cut to fit around the shaft. I also use a smaller water bottle size around my raw water pump in case the seals leak. The outboard water pump is difficult to get to and see if it leaks. Sorry I don't have any photos as the boat is 1k miles away.

Tator
Tator is offline   Reply With Quote
Old 10-01-2022, 10:51 AM   #7
Guru
 
Marco Flamingo's Avatar
 
City: Dewatto
Vessel Name: CHiTON
Vessel Model: Tung Hwa Clipper 30
Join Date: Jan 2020
Posts: 870
Quote:
Originally Posted by Comodave View Post
Why not move to a packing like Duramax and get rid of the dripping all together?
Because over tightening Duramax so that there is no drip is not recommended, even by Duramax (which I use).

The effect of saltwater in my engine room was also shown on the rear of the engine and front of the transmission, directly below the heat exchanger anodes. It looked like years of changing anodes had resulted in saltwater dripping on the engine/tranny during the change and that had eaten through the paint and caused rust. I cleaned that up, spray painted, and now use a piece of plastic bag to direct any drips into the bilge when changing anodes.

I also had an area under the raw water filter on the engine room floor that was covered by salt crystals. It kind of looked like frost. Years of pulling the filter out and cleaning it on the aluminum diamond plate had pitted the surface. Lots of freshwater and Salt Away cleaned that up. I now have the lower half of a 5-gallon bucket underneath the filter to catch the dribbles when cleaning the Groco filter.

The weird thing about saltwater is that it never dries up. It just waits for enough moisture to come back to life and start corroding again.
__________________
Marco Flamingo
Marco Flamingo is offline   Reply With Quote
Old 10-01-2022, 11:32 AM   #8
Moderator Emeritus
 
Comodave's Avatar
 
City: Au Gres, MI
Vessel Name: Black Dog
Vessel Model: Formula 41PC
Join Date: Jul 2015
Posts: 17,490
I donít see anything in the instructions that says you canít tighten it to no leakage. In fact it says you can tighten it to the desired leakage after the initial break in.
__________________
Boat Nut:
If you are one there is no explanation necessary.
If you arenít one, there is no explanation possible.
Comodave is offline   Reply With Quote
Old 10-01-2022, 01:32 PM   #9
Guru
 
Marco Flamingo's Avatar
 
City: Dewatto
Vessel Name: CHiTON
Vessel Model: Tung Hwa Clipper 30
Join Date: Jan 2020
Posts: 870
Quote:
Originally Posted by Comodave View Post
In fact it says you can tighten it to the desired leakage after the initial break in.
It seems you have chosen your "desired leakage" to be "no leakage whatsoever," but I'm not sure that is a valid interpretation of the DuraMax instructions.

A few drops of water in my bilge is easily handled by several bilge pumps, so I can let my Duramax drip. My "desired leakage" is probably a few drops a minute, but it doesn't matter to me whether it is three or seven, i.e., whether my bilge pumps once a week or every other week.

For me, dripping is less of a problem than what I have seen of the damage caused by an over tightened packing gland. I'm always surprised when I see the cost of a new SS prop shaft, forgetting that it is the yard fees that are the killer.
__________________
Marco Flamingo
Marco Flamingo is offline   Reply With Quote
Old 10-01-2022, 03:18 PM   #10
Moderator Emeritus
 
Comodave's Avatar
 
City: Au Gres, MI
Vessel Name: Black Dog
Vessel Model: Formula 41PC
Join Date: Jul 2015
Posts: 17,490
Well, if there needed to be some dripping I would suppose that Duramax would specify the minimum number of drops per minute. So since they donít say a minimum and they do say set it to your desired leakage then I believe that zero drips is acceptable. Also on our last boat we had the same stuffing box as the OP. They yard had packed it with Duramax 7 years before I bought the boat. The boxes were not dripping at all so I asked them if they were tightened too much, they said no that they always set them to no drips after the break in period. About 3 years after I bought the boat I had the engines out so I rebuilt the stuffing boxes. The shafts were in perfect condition where the packing was. So that packing had been in place for 10 years at that point and if the packing being too tight was going to damage the shafts I think it would have shown up in 10 years.
__________________
Boat Nut:
If you are one there is no explanation necessary.
If you arenít one, there is no explanation possible.
Comodave is offline   Reply With Quote
Old 10-01-2022, 05:56 PM   #11
Guru
 
City: Great Lakes
Vessel Model: OA 440
Join Date: Aug 2017
Posts: 816
I snug the Duramax packing to zero drip at the dock, then check with an IR thermometer gun while operating at cruise rpm. The stuffing boxes (pressure fed from the engines) consistently run at 5-10F above sea water temperature when at that setting. No wear the last time I pulled the shafts.
Rufus is offline   Reply With Quote
Old 10-01-2022, 06:03 PM   #12
Moderator Emeritus
 
Comodave's Avatar
 
City: Au Gres, MI
Vessel Name: Black Dog
Vessel Model: Formula 41PC
Join Date: Jul 2015
Posts: 17,490
Duramax says that it will run hotter than regular stuffing and is supposed to. It will use the stuffing box as a heat sink to remove the excess heat.
__________________
Boat Nut:
If you are one there is no explanation necessary.
If you arenít one, there is no explanation possible.
Comodave is offline   Reply With Quote
Old 10-02-2022, 12:40 AM   #13
Guru
 
SteveK's Avatar
 
City: Gulf Islands, BC Canada
Vessel Name: Sea Sanctuary
Vessel Model: Bayliner 4588
Join Date: Jul 2019
Posts: 3,254
Dave, do you have a hose from the riser feeding water to the stuffing box. I do and for that reason do not think the stuffing box needs to drip as it is kept wet. Without that feed of water I would want to stuffing box to weep water.
__________________
SteveK
You only need one working engine. That is why I have two.
Sea Sanctuary-new to me 1992 Bayliner 4588
SteveK is offline   Reply With Quote
Old 10-02-2022, 02:29 AM   #14
Moderator Emeritus
 
Comodave's Avatar
 
City: Au Gres, MI
Vessel Name: Black Dog
Vessel Model: Formula 41PC
Join Date: Jul 2015
Posts: 17,490
Yes, there was a hose for cooling water.
__________________
Boat Nut:
If you are one there is no explanation necessary.
If you arenít one, there is no explanation possible.
Comodave is offline   Reply With Quote
Old 10-02-2022, 08:35 AM   #15
Guru
 
City: Rochester, NY
Vessel Name: Hour Glass
Vessel Model: Chris Craft Catalina 381
Join Date: Aug 2019
Posts: 5,726
I'd definitely expect that to make a difference. For those of us who don't have any water force-fed to the stuffing boxes, they're more likely to need some drip to keep things cool and happy regardless of the packing used. Lower friction, better packing materials will just need less drip (but still some).
rslifkin is offline   Reply With Quote
Old 10-07-2022, 03:24 PM   #16
Senior Member
 
City: Marathon
Vessel Name: silver gift
Vessel Model: 45 jefferson
Join Date: Nov 2013
Posts: 278
I used a Forgers plastic can
Deckape is offline   Reply With Quote
Old 10-07-2022, 03:30 PM   #17
Guru
 
High Wire's Avatar
 
City: Cape May, NJ
Vessel Name: Irish Lady
Vessel Model: Monk 36
Join Date: Dec 2007
Posts: 4,599
The PO used a Gatorade bottle. It works good enough that I left it on there 8 years now.
__________________
Archie
Irish Lady
1984 Monk 36 Hull #46
Currently in Cape May, NJ
High Wire is offline   Reply With Quote
Old 10-08-2022, 03:57 PM   #18
Senior Member
 
Southern Boater's Avatar
 
City: Tasmania
Vessel Model: Sea Ranger 46
Join Date: Sep 2019
Posts: 248
Quote:
Originally Posted by Tator View Post
I use a plastic bottle such as a 1qt or larger size with with the pour end cut off, a split up the side to a hole cut to fit around the shaft. I also use a smaller water bottle size around my raw water pump in case the seals leak.

Tator
I also use the split plastic bottles to catch any spray, Iíve managed to fit a low sided utility box under each stuffing box to catch and contain any spray residue, this way I can monitor how much is leaking and what is ďotherĒ bilge water.
Southern Boater is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


» Trawler Port Captains
Port Captains are TF volunteers who can serve as local guides or assist with local arrangements and information. Search below to locate Port Captains near your destination. To learn more about this program read here: TF Port Captain Program





All times are GMT -5. The time now is 06:16 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2022, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012