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My experience has been that it very much depends upon the manufacturer.
When ethanol fuels were introduced in Canada we had a spate of diaphragm
failures which seemed to occur after the fillup with ethanol laced fuel. I
think the ones which failed were not genuine SU parts.
I did not experience diaphragm failures once ethanol resistant diaphragms
were installed but others may have encountered problems in recent years as
it's some time since I owned a Healey with HDs.
Looks like Trail Ridge Road in the Rocky Mountain National Park to me.
=F0=9F=A4=A3=F0=9F=A4=A3=F0=9F=A4=A3
M
On Sun., May 7, 2023, 6:29 a.m. Simon Lachlan via Healeys, <
healeys@autox.team.net> wrote:
> I was a bit startled by something I read the other day. It was to the
> effect that it=E2=80=99s sensible to change the jets in HD carbs every 5 =
years
> because the diaphragms harden and leak. Every 5 years?
>
> Mine have been in since 2011=E2=80=A6=E2=80=A6=E2=80=A6=E2=80=A6I=E2=80=
=99ve 3, so it=E2=80=99ll be quite a business.
>
>
>
> Another topic=E2=80=A6my copy of Roger=E2=80=99s book has arrived. Excell=
ent. Anyhow, the
> front cover=E2=80=A6..where was that taken?
>
>
>
> Simon
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<div dir=3D"auto"><div dir=3D"auto"><span style=3D"font-size:12.8px">My exp=
erience has been that it very much depends upon the manufacturer.=C2=A0</sp=
an><div dir=3D"auto" style=3D"font-size:12.8px">When ethanol fuels were int=
roduced in Canada we had a spate of diaphragm failures which seemed to occu=
r after the fillup with ethanol laced fuel. I think the ones which failed w=
ere not genuine SU parts.</div><div dir=3D"auto" style=3D"font-size:12.8px"=
>I did not experience diaphragm failures once ethanol resistant diaphragms =
were installed but others may have encountered problems in recent years as =
it's some time since I owned a Healey with HDs.</div><div dir=3D"auto" =
style=3D"font-size:12.8px">Looks like Trail Ridge Road in the Rocky Mountai=
n National Park to me. =F0=9F=A4=A3=F0=9F=A4=A3=F0=9F=A4=A3<br></div><div s=
tyle=3D"color:rgb(136,136,136);font-size:12.8px" dir=3D"auto"><div dir=3D"a=
uto"><br></div><div dir=3D"auto">M</div></div></div><br><div class=3D"gmail=
_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Sun., May 7, 2023, 6:29 a.=
m. Simon Lachlan via Healeys, <<a href=3D"mailto:healeys@autox.team.net"=
target=3D"_blank" rel=3D"noreferrer">healeys@autox.team.net</a>> wrote:=
<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;bord=
er-left:1px #ccc solid;padding-left:1ex"><div lang=3D"EN-GB" link=3D"#0563C=
1" vlink=3D"#954F72"><div><p class=3D"MsoNormal">I was a bit startled by so=
mething I read the other day. It was to the effect that it=E2=80=99s sensib=
le to change the jets in HD carbs every 5 years because the diaphragms hard=
en and leak. Every 5 years?<u></u><u></u></p><p class=3D"MsoNormal">Mine ha=
ve been in since 2011=E2=80=A6=E2=80=A6=E2=80=A6=E2=80=A6I=E2=80=99ve 3, so=
it=E2=80=99ll be quite a business.<u></u><u></u></p><p class=3D"MsoNormal"=
><u></u>=C2=A0<u></u></p><p class=3D"MsoNormal">Another topic=E2=80=A6my co=
py of Roger=E2=80=99s book has arrived. Excellent. Anyhow, the front cover=
=E2=80=A6..where was that taken?<u></u><u></u></p><p class=3D"MsoNormal"><u=
></u>=C2=A0<u></u></p><p class=3D"MsoNormal">Simon<u></u><u></u></p></div><=
/div>_______________________________________________<br>
rer noreferrer noreferrer" target=3D"_blank">http://www.team.net/donate.htm=
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<br>
</blockquote></div></div>
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