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Author Topic: Haulout Time  (Read 1270 times)

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scgunner

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Re: Haulout Time
« Reply #30 on: June 07, 2022, 01:42:31 PM »

So that's a big thumbs up from the crew for the GTU. I would like to use the GTU but my concern after reading Noah's posted article is the possible galvanic problem as I just spent $1,000 for a new S/S prop shaft.

Right now I've got three rings of 3/16" flax and after an hour it's still running hot. While I've got you guys here is everyone using 3/16" and three rings? Right now I'm wondering if I should go with two rings of 3/16" or try 1/4" packing.
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Kevin Quistberg                                                 Top Gun 1987 Mk 1 Hull #273

Noah

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Re: Haulout Time
« Reply #31 on: June 07, 2022, 02:02:48 PM »

In my stuffing box I used 1/4 in. GTU. Sorry but I can’t remember how many layers. As far as corrosion concerns, I would be “slightly” concerned if you had the old bronze shaft—not so much with the SS one. I have had NO issues with corrosion (that I can see anyway). I had my SS shaft removed two years after installing it using GTU because I needed to replace my strut. At that time I walked it back over to the machine shop that made it for me 2 yrs earlier, to inspect (because I could so why not). He said it “was still in brand new shape” but checked it over on his “truing equipment” too—all was good! My shaft is A22 SS alloy.
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1990 hull #1014, San Diego, CA,  Fin Keel,
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Jim Hardesty

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Re: Haulout Time
« Reply #32 on: June 07, 2022, 03:22:18 PM »

Quote
Right now I've got three rings of 3/16" flax and after an hour it's still running hot. While I've got you guys here is everyone using 3/16" and three rings? Right now I'm wondering if I should go with two rings of 3/16" or try 1/4" packing.

Packing size and number of rings depends on the manufacture of the shaft log.  I don't think Catalina always used the same ones.  FWIW Shamrock takes 3/16 and two rings.  Tried to put in third ring but wouldn't fit.
Not a difficult job at all.  Don Casey describes very well how to in "This Old Boat".  My personal favorite how to fix boat book.
Jim
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Jim Hardesty
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Erie, PA

KWKloeber

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Twenty years from now you'll be more disappointed by the things you didn't do, than by the ones you did.
So throw off the bowlines.  Sail away from the safe harbor.  Catch the tradewinds in your sails.
Explore.  Dream.  Discover.   -Mark Twain

scgunner

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Re: Haulout Time
« Reply #34 on: June 08, 2022, 09:24:51 AM »

With much information and helpful suggests provided here's what I've done. The yard installed three rings and it ran hot I thought due to being overly compressed, I replaced them with three rings and the nut installed loosely it still ran hot. So following Jim's post I removed the third ring and that did the trick, it's now running cool although I'll still have to adjust the drip rate, but that's just a matter of walking in the packing nut to achieve the best possible drip rate.

Thanks again guys for all the help.
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Kevin Quistberg                                                 Top Gun 1987 Mk 1 Hull #273

Ron Hill

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Re: Haulout Time
« Reply #35 on: June 08, 2022, 02:45:26 PM »

Kevin : I believe that in the early production (1986-1990) Catalina uses a packing gland that needed 3 rings of 3/16" packing.  That's what I used.  After 10 years I added a 4th ring of Gore to mine and it's still basically dripless (warm, but not hot)!!  The key is in the spring to only make SLIGHT turns (maybe as small as 1/32) to retighten to stop any drips!!

A thought
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KWKloeber

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Re: Haulout Time
« Reply #36 on: June 08, 2022, 02:53:32 PM »

Interestingly, CD sells only 3/16” to replace prop shaft stuffin’

Makes ya wonder.
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Twenty years from now you'll be more disappointed by the things you didn't do, than by the ones you did.
So throw off the bowlines.  Sail away from the safe harbor.  Catch the tradewinds in your sails.
Explore.  Dream.  Discover.   -Mark Twain

scgunner

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Re: Haulout Time
« Reply #37 on: June 08, 2022, 05:18:56 PM »

Ron,

Yes, they certainly can be fussy little bastards!

Ken,

It's nice to know that's what CD recommends, although Jim might have a point about Catalina using different nuts, when I put three rings in mine there was almost no space left and I could only get one turn on the nut before it started compressing the packing.
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Kevin Quistberg                                                 Top Gun 1987 Mk 1 Hull #273

Noah

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Re: Haulout Time
« Reply #38 on: June 08, 2022, 05:42:51 PM »

Every boat situation is different. I used 1/4 inch in my stuffing box (confirmed by checking leftover packaging today).  However, don’t know how many layers. I remember some time ago I loaned Jon W. my set of stuffing box wrenches (bought from Catalina Direct) and they did NOT fit his… lots of variables there.
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1990 hull #1014, San Diego, CA,  Fin Keel,
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Ron Hill

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Re: Haulout Time
« Reply #39 on: June 09, 2022, 02:53:53 PM »

Kevin : Over the years I have learned that in plumbing (boat or home) NEVER back up.  Always end with tightening!!

A thought
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KWKloeber

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Re: Haulout Time
« Reply #40 on: June 11, 2022, 07:13:33 AM »

Ron,

Yes, they certainly can be fussy little bastards!

Ken,

It's nice to know that's what CD recommends, although Jim might have a point about Catalina using different nuts, when I put three rings in mine there was almost no space left and I could only get one turn on the nut before it started compressing the packing.

To be clear I didn't say CD recommends anything, only that CD sells one size. 
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Twenty years from now you'll be more disappointed by the things you didn't do, than by the ones you did.
So throw off the bowlines.  Sail away from the safe harbor.  Catch the tradewinds in your sails.
Explore.  Dream.  Discover.   -Mark Twain

Stu Jackson

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Re: Haulout Time
« Reply #41 on: June 11, 2022, 05:41:15 PM »

Flax always gets a warm welcome.

In the over 25 years I have had my boat and all the Mainsheet articles since 1987, and all previous forum discussions and tech wiki articles, the conclusion is clear, as Noah said:

Each boat situation is different.

In my stuffing box wiki, I noted that my boat manual said a 1" shaft with 3 rings of 3/16" (Page 39, detail 4.4.2).  I also suggested checking your own boat manual, because there were reports of skippers needing 1/4" flax.  It's also easy to measure if you're in doubt.
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scgunner

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Re: Haulout Time
« Reply #42 on: June 12, 2022, 07:58:03 AM »

Just to correct a mistake I made, when I was referring to !/4" packing what I meant was 1/8" packing, there's no way I could get 1/4" into my stuffing box. Math never was my strong suit.
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Kevin Quistberg                                                 Top Gun 1987 Mk 1 Hull #273
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