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fuel lines quick question

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on my EA82 carbi I have three lines let me see if I have this right

 

Biggest line= fuel supply

2nd biggest line= fuel return

tiny line = vent?

 

or is tiny line the return and medium sized line is vent?

On my 84 hatch (EA81) the smallest is the return, medium is the vent. Don't know if it applies to the EA82s

On my 84 hatch (EA81) the smallest is the return, medium is the vent.

Same on my Brumby/Brat..

 

There is a 8mm, 6.3mm, and 3.2mm .. I don't know what the inch measurement is, so do the conversion.

Actually, it is:

 

5/16" = 8 mm

1/4" = 6.3 mm

1/8" = 3.2 mm

 

Pardon me, but unit conversions are my thing. Don't get me going on US and imperial gallons.....

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