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Check your fuel cap gaskets

 
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flatfishfool



Joined: 11 Apr 2009
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City/Region: Anchorage
State or Province: AK
C-Dory Year: 2002
C-Dory Model: 24 Tomcat
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PostPosted: Mon Jun 05, 2023 4:51 am    Post subject: Check your fuel cap gaskets Reply with quote

Had a friend who ended up with many problems with water in gas due to failed gaskets. Checked mine this spring and they looked marginal so have just replaced. Photos in my mods album: http://www.c-brats.com/modules.php?set_albumName=album3365&op=modload&name=gallery&file=index&include=view_album.php
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Robert H. Wilkinson



Joined: 26 Jan 2011
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PostPosted: Mon Jun 05, 2023 9:48 am    Post subject: Reply with quote

Mine looked like yours. I just replaced them last year - they were 12 years old.

Good reminder to check them.

Rob

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C-Wolfe



Joined: 16 Sep 2020
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PostPosted: Mon Jun 05, 2023 4:52 pm    Post subject: Reply with quote

Anyone in/near Anchorage that wants a new gasket for the gas fill cap, I think I have 30 to give away. just pm me.
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tsturm



Joined: 01 Nov 2003
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City/Region: Soldotna
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PostPosted: Mon Jun 05, 2023 9:04 pm    Post subject: Reply with quote

C-Wolfe wrote:
Anyone in/near Anchorage that wants a new gasket for the gas fill cap, I think I have 30 to give away. just pm me.


"O" Ring Wink Thumbs Up Thumbs Up
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C-Wolfe



Joined: 16 Sep 2020
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PostPosted: Mon Jun 05, 2023 10:05 pm    Post subject: Reply with quote

tsturm wrote:
C-Wolfe wrote:
Anyone in/near Anchorage that wants a new gasket for the gas fill cap, I think I have 30 to give away. just pm me.


"O" Ring Wink Thumbs Up Thumbs Up


Yes, O'ring, not gasket. Very Happy. Fuel/solvent resistant
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flatfishfool



Joined: 11 Apr 2009
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City/Region: Anchorage
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C-Dory Model: 24 Tomcat
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PostPosted: Tue Jun 06, 2023 10:55 am    Post subject: Reply with quote

Ah yes “O-ring”. Good offer on giveaways.
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chipwagon



Joined: 02 Mar 2016
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PostPosted: Tue Jun 06, 2023 11:14 am    Post subject: Reply with quote

What is the size/spec of O-ring to get for the gas caps?
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tsturm



Joined: 01 Nov 2003
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PostPosted: Tue Jun 06, 2023 10:27 pm    Post subject: Reply with quote

chipwagon wrote:
What is the size/spec of O-ring to get for the gas caps?


Take the old one to your local Hydraulic shop.👍 Thumbs Up Thumbs Up
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C-Wolfe



Joined: 16 Sep 2020
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PostPosted: Wed Jun 07, 2023 3:14 pm    Post subject: Reply with quote

This is what I got, second season and work good, no leak.

126 Buna-N O-Ring, 50A Durometer, Round, Black, 1-3/8" ID, 1-9/16" OD, 3/32" Width (Pack of 30)

I think the "buna-n" is solvent resistant, O-ring made of other material might not last as long if exposed to fuel or other solvent.
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smckean (Tosca)



Joined: 18 Jan 2014
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PostPosted: Mon Jun 12, 2023 2:09 pm    Post subject: Reply with quote

C-Wolfe,

I sure am glad you posted the specs of those o-rings. I don't know how I would ever figure it out otherwise. I noted there are a zillion o-rings on Amazon. Only the 30 pack is available. I paid less the $10 for them.

Here's what I found on this "buna-n" material:

Buna-N (NBR) o-rings are recommended for
silicone greases and oils,
water,
petroleum oils
& fuels.

Buna is not recommended for
ketones
halogenated hydrocarbons
auto, & aircraft glycol-based brake fluids
strong acids
& not resistant to sunlight, ozone or weathering.

Benefits of Buna (Nitrile)
good wear resistance,
good compression set resistance,
good short-term resilience, and
good permeation resistance

Common Applications for Buna
hydraulic oils and fuels
extreme service-life
pneumatic
& vacuum

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Purchased Tosca in 2014
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