Paul, I've been there and done that. When the leak past the end of
the butterfly shafts gets bad enough, you can't slow the engine down by
use of the idle screws. It's like a leak at carb to manifold gaskets or
manifold to head gasket. If you richen up the mixture enough to slow it
down, you get into an over-rich running condition that decreases the gas
mileage and will foul the plugs.
Consider: the guy packed heavy grease around the ends of the
butterfly shafts and the engine slowed down dramatically. What more do
you need to know?
Cheers,
CR
Paul Hunt wrote:
> An engine won't run on air alone. Regardless of air being drawn in from the
> outside past worn bushings, for an engine to run at all it must also be
> drawing fuel past the butterfly. One should be able 'tune out' any high
> idle as a result of a vacuum leak by use of the idle screws. But if
> anything stops the butterfly from fully closing the carb throat you won't be
> able to do that, and that is irrespective or vacuum leaks or not. If you
> can't tune out the idle caused by worn shafts/bushings then there is some
> other problem with the carb(s) as well.
>
> ----- Original Message -----
> From: "Charles & Peggy Robinson" <ccrobins@ktc.com>
> To: "Paul Hunt" <paul.hunt1@blueyonder.co.uk>
> Cc: "Christian, Skip" <wellner.christian@navy.mil>; "MG Digest (E-mail)"
> <mgs@autox.team.net>
> Sent: Sunday, April 11, 2004 2:48 AM
> Subject: Re: Carb & Trans Oil Questions
>
>
>
>> It's the other way around. The problem is the air being drawn in past
>>the worn shafts/bushings.
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