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14-10-2011, 05:14
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#1
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Registered User
Join Date: Jan 2010
Location: The Space Coast, Florida
Boat: Ericson 35 Mk III
Posts: 79
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Seacock Maintenance
We are on the hard for a bottom job. Although I know that seacocks should be inspected/lubricated when the boat is out of the water, I have been unable to find any information on HOW to do it. I have a series of 7 Marelon ball seacocks and at least 1 is frozen (a scupper so it's not that big a deal but I'd still like to get it operational). The rest move freely and easily. Can anyone give me an idea about how to tackle this job?
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14-10-2011, 05:27
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#2
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Registered User
Join Date: Oct 2010
Location: Avalon, NJ
Boat: Albin 40 double cabin Trawler
Posts: 1,886
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Re: Seacock maintenance
Quote:
Originally Posted by SVMorningStar
We are on the hard for a bottom job. Although I know that seacocks should be inspected/lubricated when the boat is out of the water, I have been unable to find any information on HOW to do it. I have a series of 7 Marelon ball seacocks and at least 1 is frozen (a scupper so it's not that big a deal but I'd still like to get it operational). The rest move freely and easily. Can anyone give me an idea about how to tackle this job? 
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Check the forespar website...I think they have the instructions there...
Marelon needs to be moved regularly from my experience...monthly or so...a good squirt of teflon based grease might be all they need and worked...but I'm not sure if the handle area needs anything....best to check directly with Forespar.
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14-10-2011, 05:27
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#3
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Registered User
Join Date: Dec 2008
Location: St. Georges, Bda
Boat: Rhodes Reliant 41ft
Posts: 4,131
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Re: Seacock maintenance
Didyou try advanced search on this forum.
Asked and answered many times
__________________
so many projects--so little time !!
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14-10-2011, 21:29
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#5
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Registered User
Join Date: Jan 2010
Location: The Space Coast, Florida
Boat: Ericson 35 Mk III
Posts: 79
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Re: Seacock Maintenance
Thanks. I'll check those places out.
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14-10-2011, 21:42
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#6
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Registered User

Join Date: May 2011
Location: Miami Florida
Boat: Ellis Flybridge 28
Posts: 4,078
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Re: Seacock Maintenance
Be careful with your frozen Marlon seacock. The stem between the handle and the ball is a weak point. I tried to force one and it broke. The best way to maintain them is to move them often. A little non petroleum grease once in a while won't hurt.
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Retired from Hopkins-Carter Marine Supplies
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15-10-2011, 18:08
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#7
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Registered User
Join Date: Jan 2010
Location: The Space Coast, Florida
Boat: Ericson 35 Mk III
Posts: 79
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Re: Seacock Maintenance
I was able to get the stuck one to move this afternoon, though not the whole way. I think if I can get the lubricant in there, it will probably loosen the rest of the way up. It was already that way when we bought the boat. I just didn't want to address it earlier while it was in the water for obvious reasons.
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15-10-2011, 19:04
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#8
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Registered User
Join Date: Oct 2009
Location: CLOD in OH
Posts: 257
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Re: Seacock Maintenance
Remove the drain plug, usually has a square head. Install an appropiate grease zert and give it a couple of pumps. Lubed up quite nicely.
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Paydirt
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15-10-2011, 20:32
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#9
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Eternal Member
Join Date: Aug 2006
Location: North of Baltimore
Boat: Ericson 27 & 18' Herrmann Catboat
Posts: 3,798
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Re: Seacock Maintenance
I don't think Marelon seacocks have those
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15-10-2011, 20:48
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#10
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Registered User
Join Date: Oct 2009
Location: CLOD in OH
Posts: 257
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Re: Seacock Maintenance
Chief, another cruiseheimer moment on my part, was thinking about the brassy ones not the plastic ones.
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Paydirt
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16-10-2011, 22:47
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#11
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Registered User

Join Date: May 2011
Location: Miami Florida
Boat: Ellis Flybridge 28
Posts: 4,078
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Re: Seacock Maintenance
Mark, That's very good advise for the tapered cone type seacock but you can blow the teflon seats out of the ball valve types by pumping grease into them, bronze or plastic.
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Retired from Hopkins-Carter Marine Supplies
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17-10-2011, 00:08
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#12
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Registered User
Join Date: Feb 2011
Location: Valencia, Spain
Boat: SAGA 27 AK
Posts: 509
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Re: Seacock Maintenance
There was a good report on seacock inspection in the June 2011 issue of Yachting Monthly, I'll PM it to you since there may be copyright issues if I post it here.
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Sweet are the uses of adversity.
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