This is interesting in that I was having difficult with the throttle cable
binding on my 80 mgb. Basically the pedal was 'hard'. Thought it was too
much spring initially, then realized it began after I had replaced the cable
assembly with a new one from moss early in the spring.
I noted on closer inspection that the cable entered the car slightly off
center from the pedal, causing it rub on the inside of the threaded nipple
portion of the cable.
Perhaps the pedal mounting is slightly bent, but it wasn't a problem before
I changed the cable. I dug out the old one (glad I didnt throw it away) and
noted the old cable had a plastic inner lining of some sort. I threaded my
new cable into the old outer casing, and it works great! No binding at all,
although I have some concern about wear due to the cable and the pedal being
out of alignment by a few degrees...
Does anyone sell replacement cables with the inner plastic lining?
--
-----------------------------------------------------------
Marc Siegel, Charm Net, LLC. eMail: smarc@abs.net
Baltimore, MD http://www.charm.net voice: 410/361-8160
-----Original Message-----
From: owner-mgs@autox.team.net [mailto:owner-mgs@autox.team.net] On Behalf
Of Paul Hunt
Sent: Thursday, September 09, 2004 10:33 AM
To: Paul Root; mgs@autox.team.net
Subject: Re: throttle return spring
I don't really see how using more springs might stop one of them breaking,
using none might though :o)
HS carbs had three springs - one on each throttle cam and one directly on
the cable. There should be a little free play in the cable and pedal to
prevent the butterflies from 'hanging open' on the cable. This is one of
the many causes of not being able to reduce the idle speed to stalling
point.
The Workshop Manual appears to show a similar arrangement for HIFs but it is
not totally clear. The Parts Lists are similarly unclear as they either
split them up into 'cable return' spring (one) and 'return spring' (two),
quote three springs, or just one, with the latter two not indicating any
change point.
There was a choke return spring of the same type as the others, Plus
accelerator and choke return springs as part of the carbs themselves and not
the linkage between them.
You should find out if the sticking is in the pedal, cable or one or other
carb, but that in itself won't help the breakage. That will be because of
sharp edges on the brackets wearing through them, incorrect spec i.e. being
over-stretched, or simply poor quality. More springs (i.e. in parallel)
would help to return the system fully to idle at the expense of making a
heavier pedal, but again not reduce the likelihood of breakage.
PaulH.
----- Original Message -----
From: "Paul Root" <ptroot@iaces.com>
To: <mgs@autox.team.net>
Sent: Thursday, September 09, 2004 2:08 PM
Subject: throttle return spring
> The throttle spring (Moss #370-335), that I use on my throttle for
> my HIF conversion on my 'B, has broken for the second time this year...
---
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