[Healeys] HD6s

[simon.lachlan at alexarevel.plus.com]

Thank you very much for the replies with regard to my carb query. Once we
established that the so-called "Jet" or "Jet assembly" did have a diaphragm
or membrane we got going alright.

It seems that there's quite a range of opinion..some for changing them, some
not. In general, if one might say that the replies addressed the "practise"
or practical experience, I decided to go for the "theory" by asking Burlen
here in the UK. I've always found them very helpful.

This is what they said, in no particular order of importance.

1.	Their parts went "Ethanol proof" in 2012. This reflects their
worldwide sales rather than their domestic market at the time.
2.	The worst enemy of these diaphragms is being allowed to dry out.
They go brittle and stiff and don't respond well to being required to
function after a dry period. The practise of draining one's carbs before
laying up the car for a period is therefore particularly ill-advised.
3.	My car is used throughout the year - plainly more in the summer -
but shouldn't be subject to drying out. But, having said that, he suggested
that "everything wears out in the end" and that my carbs' diaphragms, having
been in since 2011, were on or approaching the borderline.
4.	Leakage from a failing diaphragm is unlikely to be catastrophic in
the first instance. More likely a seepage to start with but which would get
catastrophically worse if ignored.
5.	I queried whether the springs underneath should be replaced at the
same time as, if there is water around, they'll be in it. Unlikely, he
said..but, since the carbs are on the bench, might as well do it. They're
cheap, so why not? 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://autox.team.net/pipermail/healeys/attachments/20230509/b953310c/attachment.htm>