O Rings for Deck Fill Caps

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Nichole340

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Jan 12, 2019
111
Hunter 340 Narragansett
Does anyone know where I can get Deck Fill O Rings for my Hunter 340 (2000).
Mine are worn, brittle and cracked. I can measure the outside diameter easy enough (app. 1 7/8 "). I believe the inside is about 1 1/2". The thickness is a question.
Being so brittle I am afraid to try and roll one over the threads and have in break into pieces. And they are out of shape for a real accurate measurement anyway.
I see replacements on the SBO site but not the O Rings. I'm not opposed to buying new and will but I would really like to have a set of replacement O Rings on hand also.
Also is the O Ring for the Diesel Cap the same as the Waste and Water Caps? Or is it a special type for fuel contact?
Any help is greatly appreciated.
 
JamesG161

JamesG161

SBO Weather and Forecasting Forum Jim & John
Feb 14, 2014
7,815
Hunter 430 Waveland, MS
Call the SBO store and ask them for the Manufacture of the caps.
Then contact the Manufacturer for the O-Ring size or a set of replacements.

Jim...
 
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Ed Caldwell

Ed Caldwell

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Jul 29, 2004
413
Hunter 340 Lake Lanier, GA
Buy the new cap in the green color for your diesel fill, as that one willl cause problems when water leaks into your diesel tank. Take the new cap to your local Ace Hardware and match the o ring to their wide selection to buy spares. Install the new diesel cap. After a thorough cleaning, keep the old one on board with a new o ring in case you drop a cap overboard someday, it will fit any of the three fills.
 
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Hello Below

Hello Below

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May 7, 2012
1,567
Hunter e33 Maple Bay, BC
This is one of those items that you want to insure that you get the exact replacement. Ingress of water (salt or fresh) into either the water or diesel deck fill would not be good. FWIW I inspect those 2 o-rings regularly and change them out at first sight of any degradation.
 
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Hello Below

Hello Below

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May 7, 2012
1,567
Hunter e33 Maple Bay, BC
Ralph Johnstone said:
Once you have the new O rings, keep them in pristine condition by coating them with a NON-petroleum grease (synthetic grease) such as Superlube. Every couple of years is often enough. Mine are 24 years old and could pass for brand new.
Click to expand
Ralph, is it okay to use Superlube on the water deckfill O ring or would it do a salty ol’ guy in?
 
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N

Nichole340

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Jan 12, 2019
111
Hunter 340 Narragansett
Thank you everyone for the help. I never thought of Ace Hardware, as I exhausted Home Depot and Lowes for any match. Never gave another hardware store a thought. I'll have all new caps by next week (3 in my case) and match up the old ones with new O Rings for spares.
I completely agree with the diesel cap being first. That's why I didn't attempt to remove the old ones for now and came here for advice.
Fortunately, I guess, it's going to be in the 90's going forward from today, so rain isn't a problem.
Thank you all again.
 
N

Nichole340

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Jan 12, 2019
111
Hunter 340 Narragansett
Once I match up the ones for my 340 I'll be sure to post the part numbers like you, for others to reference also. This is one hard part to find elsewhere.
 
Peggie Hall HeadMistress

Peggie Hall HeadMistress

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Dec 2, 1997
8,966
- - LIttle Rock
Ralph Johnstone said:
Once you have the new O rings, keep them in pristine condition by coating them with a NON-petroleum grease (synthetic grease) such as Superlube. Every couple of years is often enough. Mine are 24 years old and could pass for brand new.
Click to expand
+1 for SuperLube grease..It's what I've recommended for years to lube manual toilet pumps, winches, y-valves, seacocks, etc. You don't have to buy a whole can of it. Ace Hardware also sells it in a tube, which makes it a lot easier to use and also easier to store aboard.

SuperLube has a complete line of lubricants...be sure to get the thick grease.

Nichole340 said:
Fortunately, I guess, it's going to be in the 90's going forward from today, so rain isn't a problem.
Click to expand
I wish it were ONLY "going into" the 90s here...our temps--with no rain-- been ranging between 97-103 for the last couple of weeks and will be for at least the rest of this month.

--Peggie
 
tkwhalen

tkwhalen

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Jun 8, 2004
285
Hunter 49 60803 Lake Erie
just bought some yesterday at west marine ... pricey ... so if you can find hem at Ace go for it
 
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