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BJ7 fuel line to carbs

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Johnny

Johnny

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I'm restoring a 1962 BJ7 and have encountered a problem with fuel delivery to the carbs. The fuel line from the fuel pump to the engine bay is 5/16" inch, which I believe is correct. In the engine bay end there is a male 7/8" fitting, measured across the flats, and standard 3/8" end threads. Now, at the HS6 carbs there is a 1/4" nipple to accept the fuel line.

My question is, how do you go from a 5/16" fuel line to a 1/4" fuel line? The, what I believe to be, original fuel line was a 3/8" line from the fuel pump, to another 3/8" line that was open ended and "squeezed" onto the 1/4" inch nipple at the carbs (see attached photo). That doesn't look correct to me. Any suggestions?

Thanks to all who respond.
 

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Johnny

My BJ7 has the larger diameter 'rubber' hose clipped direct to the metal fuel line, then into an inline filter and then onto the number 1 carb, ca't remember that pipe size, will look tonightt, but then there is the smaller 1/4" hose between carbs all very much as your photo

Bob
 
johnny, another thing you can do is go on the moss motor page on "fuel lines" and see if you have the same set up, /bcforum/images/%%GRAEMLIN_URL%%/savewave.gif
 
Hi Johnny,

The original setup for the BJ7 is a petroflex fuel line like what you show in your picture. The inside diameter of the rubber line is 1/4" (actually about .23") and slips over the 1/4" carb inlet pipe. There is a rubber over cap that keeps the metal outer sheath from fraying and gives the hose clamp something larger to clamp down on (OD here should be at least 5/8"). I think part of your rubber overcap is missing or someone has stripped off the metal sheath material exposing the 1/4" hose. Also note the original hose clamp looks more like the hose clamp on the small fuel line that connects the two carbs. BTW, that small fuel line is originally also a petroflex with rubber overcaps on each end.

At the other end is a female threaded connector with internal flange that seals to the hard fuel line fitting (like you describe). So basically the 5/16' inch fuel line gets necked down to 1/4" ID for this approx. 20" length of petroflex line.

The petroflex line is routed through two metal brackets that attach to the front carb mounting studs (your picture shows just one bracket).

I ordered a new petroflex line from Healey Haven last week but have not received it yet. I'll let you know what I think when it arrives .. hopefully in a day or two.

Cheers,
John
 
Thanks to all who responded. John, I'd like to see a photo of the line you receive from Healey Haven. Moss doesn't offer a fuel line for BJ7's, it's NA. I failed to mention the original line was 5/8" female (measured across the flats) that screwed onto the hard line to fuel pump. The other end was only 7/16" also female that screwed to a fuel regulator added by the PO. It had a yellow band around it near the smaller end, couldn't read the writing on it, I believe this to be original. The "out" side of the fuel regulator had a 5/16" stainless mesh line attached to a barb with the other end attaching to the carb input as you mentioned it had a rubber pulled back as shown in the photo. I'm finding out that most modern fuel fittings don't have the original type British conical ends, which are more pronounced (pointy). The problem might be that if you adapt new fittings to the older lines they'll leak.
 
Hi Johnny,

Below is a picture of an original BJ7 Petroflex line (note the yellow band) and the replacement part from Hemphill's Healey Haven (which had a portion of AH Spares sticker still on it and said Made in England on another sticker). They both have 5/8" fittings for the connector at the hard line and 1/4" slip fit at the carb end and the length is correct (21.25" overall). The conical ends look the same and it cinched down well to the hard line when I test fit it (has not been pressure tested but I don't think there will be a problem). The replacement does not have the rubber sleeves that correspond with the carb brackets but it should be easy to retrofit something (one can pull off the rubber cap at the carb end and slip on some suitably sized rubber sleeve or tubing). The replacement line did come with the original type hose clamp as shown in picture. BTW, it was $29 from HHH. I also have a source for the hard line fitting which is soldered on to the fuel line if you need.

Cheers,
John


petroflex.jpg
 
Yep John, now if you just install it like the later BJ8 cars you will be a lot safer.----Keoke- /bcforum/images/%%GRAEMLIN_URL%%/hammer.gif
 
Johnny

Felt a bit guilty for not coming back earlier, but see that you have a lot of usefull info. For the record, I must have a male hose connector screwed onto the end of the metal fuel pipe and an 8mm rubber hose clipped to it leading to the first carb.

Bob
 
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