[Healeys] HD8 Carb leaking

Michael Salter michaelsalter at gmail.com
Sat May 28 11:49:49 MDT 2016

Hi Achim,
The "D" in the HD8 model designation of your carbs stands for "diaphragm ".
The diaphragm in your carb is leaking, probably ruptured, allowing fuel to
leak through and out of the bottom of the carb.
It is possible to replace the diaphragm without removing the carbs but it
is *very * difficult and not something that I would suggest that you tackle
unless you are pretty familiar with the carbs construction.
I have found that fuels containing ethanol can cause rapid deterioration of
some makes of diaphragm so be careful to get ethanol resistant diaphragm(s)
or avoid fuels containing it.
Michael S
BN1 #174
On May 28, 2016 10:39 AM, "Achim Spethmann" <hspethmann at t-online.de> wrote:

> Hello,
> You know the good feeling, when you turn the key and the fuel pump is
> clicking to fill the carburetors.
> But some days ago, when testing some electrical stuff, I had a smell of
> gas in the garage. No, it's not the float chamber. There is no gas coming
> out the overflow tube and the fuel pump stops its work. But when I
> inspected the carbs I saw some wet sparkling a the bottom of the front
> carb. Not much, no dripping, but enough to cause a smell of gas in the
> engine compartment. When the car is hot, you cannot see it, the gas is
> evaporating.
> I took the attached photo to show what I mean. Where should I begin to
> find out what causes the leak?
> Thanks in advance.
> Achim
> 1964 BJ8 MK III
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