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Old 04-27-2019, 02:24 AM   #41
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In 16 years, I've only neeed new seals once. ut I have had to change two rams which had been installed incorrectly from new. Once changed, no problems.

So, next to nothing is the cost of maintenance.
I'm curious about the 'need new seals once'. Do you drop the fins, inspect and say 'no leaks so lets go a bit longer'? I'm a little puzzled, because at that point replacing the seals is not a big cost, but it is a big comfort factor.
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Old 04-27-2019, 04:19 AM   #42
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I'm curious about the 'need new seals once'. Do you drop the fins, inspect and say 'no leaks so lets go a bit longer'? I'm a little puzzled, because at that point replacing the seals is not a big cost, but it is a big comfort factor.
Morning, Brian,

Good question. The only reason we had new seals was simply because I wanted them looked at in case. When inspected, they actually didn't need changing but we changed them in any case.

Only two rams have ever been changed, and I carry a spare.
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Old 04-27-2019, 06:20 AM   #43
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Papabear - which stabilizers do you have?
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Old 04-27-2019, 06:49 AM   #44
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Papabear - which stabilizers do you have?
ABT Trac. Model 200. Once a year when Play d'eau is hauled for her annual spa treaments, I remove the winglets and check the anodes. That's all.
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Old 04-27-2019, 07:35 AM   #45
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My Wesmar seals are replaced every 4-5 years. Or roughly every 750 hours of operation. The first time they were pristine, as were shafts. No signs of issues on this schedule.

The stabilizers are easy to see and monitor during ER checks every hour or two. I know some vessels where the stabilizers are completely hidden - scary IMHO.
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Old 04-27-2019, 08:46 AM   #46
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Great thread!

That really helped my understanding of the issues involved. I am currently looking for a stabilized boat and i feel better educated having read this,

A.
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Old 04-27-2019, 09:11 AM   #47
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We have Naiads (sounds painful) and will pull the rams this Spring to have them rebuilt. I learned on another thread that, despite what I’d been told by Naiad, the rams often can be successfully rebuilt for perhaps 1/10 the cost of replacements . . . which was about one boat unit per ram for parts only.

We had the seals done as preventive maintenance two years ago even though they were in pristine condition at the time. Trouble is, you don’t know their condition until you drop the fins and once you’ve gone that far, you might as well do it all.
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Old 04-28-2019, 05:54 AM   #48
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And what a gorgeous wooden boat she is!! Congrats from a wooden boat owner whose boat celebrated her 50th birthday last year!!! GB 32 build number 95, 1968 Hong Kong
no stabilizers.......... Happy sailing!!
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Old 04-28-2019, 08:30 AM   #49
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I'm curious about the 'need new seals once'. Do you drop the fins, inspect and say 'no leaks so lets go a bit longer'? I'm a little puzzled, because at that point replacing the seals is not a big cost, but it is a big comfort factor.


I donít think you can really assess the seals from the outside. They wonít be dripping oil, for example. When submerged, the water pressure pushes water past the seals into the bearings. If you drain the shaft oil you might find it milky with water contamination, but at that point it might be too late for the bearings and shaft. Hence replacement on a scheduled interval.
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Old 04-28-2019, 09:35 AM   #50
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I just follow what the manufacturer suggests. Part of the cost of owning a boat
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Old 04-28-2019, 11:26 AM   #51
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Stabilizer seal replacement

Most manufactures will say 3 to 5 years for seal replacement. As someone who actually does this for a living I recommend every 5 years for most users based on the projects I have done. Now to qualify this every boat and boat user is different so the wear rates may vary. Just keep in mind this is the less expensive route to go. We are currently working on a 58 Selene that someone had installed the seals backward on so it allowed seawater to enter the mid cavity and sit there. Over time the seawater loses its oxygen and that causes electrolysis. The fin shaft are pitted beyond repair so a basic seal replacement that would normally cost between $1500 to $3000 (depending on fin size) will now cost an additional $15,000 to replace both fins. Just some food for thought.

Safe Boating!
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