Thanks, you pretty much confirmed everything I was thinking.
Paul.
Paul Hunt wrote:
> 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...
>
>
>
>
>
--
______ Paul T. Root
/ _ \ 1977 MGB
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