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Old 07-03-2024, 22:01   #1
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Fuel Shut Off valve

The fuel shut off valve on my starboard fuel tank is weeping diesel slowly. Nothing drastic at the moment but it’s not going to get better. It’s an old valve and I can’t see any way of tightening it to stop the weeping. The fuel pipe looks like 3/8”. The boat was built in Canada in 1988 so most likely a USA type fitting. I have attached a couple of photos for reference.




Can anybody identify the valve and advise if it’s possible to tighten it up. Or suggest a comparable (direct swap) replacement.

I keep my tanks topped up where possible and am currently cruising remotely and cant empty the fuel tank. Changing the valve out be tricky with diesel in the tank but possible if the replacement valve has the same thread fitting nut.

I am hoping someone out there will recognize the valve.

Cheers,
Ray
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Old 07-03-2024, 22:31   #2
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Re: Fuel Shut Off valve

Does this feed from bottom of tank, rather than a pickup tube?
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Old 07-03-2024, 22:51   #3
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Re: Fuel Shut Off valve

The fuel feeds from the bottom of the tank. I have two fuel tanks, port and starboard. Each tank has an individual shut off valve, same as photo. There is a three way valve to select which tank is in use before the filter.
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Old 08-03-2024, 00:27   #4
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Re: Fuel Shut Off valve

Given its age and construction, it is very likely the valve can be disassembled and repaired. It may simply be a spring that has lost its compression or the internal surfaces have become slightly pitted. The internal sealing surface may just lapping (using valve grinding paste) to restore its integrity.

Failing that, a more modern SS stop cock (mini ball valve) can be found at any valve supplier.
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Old 08-03-2024, 00:45   #5
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Re: Fuel Shut Off valve

Quote:
Originally Posted by Truce View Post
The fuel shut off valve on my starboard fuel tank is weeping diesel slowly. Nothing drastic at the moment but it’s not going to get better. It’s an old valve and I can’t see any way of tightening it to stop the weeping. The fuel pipe looks like 3/8”. The boat was built in Canada in 1988 so most likely a USA type fitting. I have attached a couple of photos for reference.




Can anybody identify the valve and advise if it’s possible to tighten it up. Or suggest a comparable (direct swap) replacement.

I keep my tanks topped up where possible and am currently cruising remotely and cant empty the fuel tank. Changing the valve out be tricky with diesel in the tank but possible if the replacement valve has the same thread fitting nut.

I am hoping someone out there will recognize the valve.

Cheers,
Ray
I think those are jic fittings but which size?
https://www.jegs.com/i/JEGS/555/1654...BoCdIcQAvD_BwE
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Old 08-03-2024, 14:35   #6
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Re: Fuel Shut Off valve

You want the Anderson Brass Co. model 676-C6 valve .
It's a UL listed marine fuel valve.
It should be a direct replacement for your 3/8ths flared tubing lines.

https://www.andersonbrass.com/m670-series-marine

https://www.andersonbrass.com/_files...062f0dc5d5.pdf

Edit; the valve in your pics does not look like a fuel valve, rather it appears to be a common type that was used for natural gas supply.
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Old 08-03-2024, 15:13   #7
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Re: Fuel Shut Off valve

Further to Bowdrie
SAE 45deg. 3/8 OD copper tubing fittings are the norm in N.America for everyday common use.
JIC 37deg & ?other 37deg flare fittings are used in milspec & hydraulic applications.
With apologies to Jedi,I think its more likely a 45deg flare.The only way to know is disassemble & look at one end of valve.
Cheers/Len
https://en.wikipedia.org/wiki/Flare_fitting
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Old 08-03-2024, 15:23   #8
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Re: Fuel Shut Off valve

AUS. source of SAE 3/8" brass 45deg flare fittings-same as we use I believe
They don't list flare valves,but they do list taper pipe by 3/8 flare adapters.

You may have to build a flare valve by screwing "taper pipe thread by flare adapters" into both ends of a taper pipe thread ball valve.
I believe the Keefer SAE fittings will be N.A. NPT-not BSPT.

http://www.keeferbros.com.au/Product...lare/index.asp








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Old 08-03-2024, 15:28   #9
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Re: Fuel Shut Off valve

Quote:
Originally Posted by deblen View Post
Further to Bowdrie
SAE 45deg. 3/8 OD copper tubing fittings are the norm in N.America for everyday common use.
Yes, you are correct.
And further from me.
I would add that if the OP is going to replace any of the copper lines,(recommended,) and if a refrigeration supply place is convenient, it is worthwhile to replace those "hardware store" flare nuts, (which are machined from hex-stock,) with the refrigeration grade ones which are forged and also have thicker walls.
Unless you use a special flare-nut-wrench the thin machined ones are more prone to distort when using an open-end or adjustable wrench.
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Old 08-03-2024, 15:32   #10
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Re: Fuel Shut Off valve

Quote:
Originally Posted by deblen View Post
Further to Bowdrie
SAE 45deg. 3/8 OD copper tubing fittings are the norm in N.America for everyday common use.
JIC 37deg & ?other 37deg flare fittings are used in milspec & hydraulic applications.
With apologies to Jedi,I think its more likely a 45deg flare.The only way to know is disassemble & look at one end of valve.
Cheers/Len
https://en.wikipedia.org/wiki/Flare_fitting
Don’t hesitate to whack me, I barely know what I’m talking about when it comes to anything mechanical… just was surprised types of fittings wasn’t discussed yet
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Old 08-03-2024, 15:54   #11
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Re: Fuel Shut Off valve

Quote:
Originally Posted by s/v Jedi View Post
Don’t hesitate to whack me, I barely know what I’m talking about when it comes to anything mechanical… just was surprised types of fittings wasn’t discussed yet

I've been lying in wait for you
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Old 08-03-2024, 16:56   #12
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Re: Fuel Shut Off valve

If the OP is still in NZ, he can get almost any flare fitting from Gameco https://www.gameco.com.au/product-ca...-flare/page/4/

They have an outlet in Masterton and sell online.
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Old 09-03-2024, 00:21   #13
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Re: Fuel Shut Off valve

Many thanks to you all above who have provided knowledgeable and good advice. I am a bit baffled by the technical stuff but will figure it out over a couple of beers. The links will be helpful I think. I am in Indonesia and options are quite limited where I am at the moment. Hopefully, I can get a couple of replacement valves online. Many thanks, Ray
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