Author Topic: Oil and fuel lines for early Douglas 2 3/4  (Read 4290 times)

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Offline gsx1100s

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Oil and fuel lines for early Douglas 2 3/4
« on: 09 May 2007 at 05:01 »
I just wanted to check on the diameter of the oil and fuel lines before buying them.
Am I correct in that the oil line is 1/4"  and the fuel 5/16" ?

regards Michael
"My first car was a motorcycle"

Offline Chris

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Re: Oil and fuel lines for early Douglas 2 3/4
« Reply #1 on: 09 May 2007 at 07:54 »
Hi Michael
All my 2.3/4hp models from 1910 to 1925 have 1/4" copper pipes (nickel plated) for both petrol and oil pipes. The standard connector at the base of the carburettor, Douglas or AMAC, would be large enough for a 5/16" pipe but I doubt that the usual petrol taps available that only have a 1/8" BSP thread into the petrol tank would have a bottom union nut large enough to take 5/16" pipe. I cannot guarantee that some models may not have had 5/16" petrol pipes originally as these are fairly fragile items and together with petrol taps may have been replaced several times over their lifetime. Chris.