Rick,
There are two set screws which act on the throttle shaft. There are two air
bleed adjusters. The former could in the extreme be used to set the idle (in
fact many owners do so erroneously) they are provided to perform the
function I described in my prior post. These are the set screws I'm talking
about. In the Moss catalog it is item #57 HD8 carb and in fact is named
"stop adjusting".
Dave
It's going home time...see you tomorrow
Frogeye@SWCP.com Taos Garage Annex in Albuquerque
'62 BT7 MK II, '54 BN1, '62 Fiat 1600S
http://www.britishcarforum.com/TaosAnnex.html
----- Original Message -----
From: "Eric (Rick) Wilkins" <wilko2@cox.net>
To: "HealeyList list" <healeys@autox.team.net>
Sent: Friday, June 18, 2004 1:14 PM
Subject: Re: Re timing marks (carbs)
> Dave,
> What "set screws" are you talking about?
> I've just been looking at a few carbs and a few books and see no
> mention of any "set screws". there were a small number of HD type carbs
> that did have a throttle adjustment screw near the mixture screw.
> On almost all carbs, the throttle plates are held to the shafts by two
> screws which are not adjustable and who's only job is to hold the plate
> to the shaft. The shaft will spin until the plate seats against the
> body. That is an absolute value and is not adjustable on any carb I've
> seen.
> Can you elaborate?
>
> Rick
> San Diego
>
> On Jun 18, 2004, at 12:09 PM, frogeye wrote:
>
> > Rick,
> > Ok, now we're getting somewhere. The throttle is designed to close
> > all the
> > way (yes), true, BUT (and this is what I'm trying to get everyone to
> > understand) the set screws are there for the very purpose of NOT
> > allowing
> > them to close all the way. They are designed to allow a very, very,
> > very
> > small gap (which when set correctly has no bearing on the functioning
> > of the
> > choke). They are there to dis-allow degradation of the carb body
> > and/or the
> > throttle plate (butterfly) due to repeated opening and closing and
> > premature
> > shaft wear.
> > This also applies to the fuel drains in the manifold...they also
> > create a
> > "leak" of sorts. All of these '' calibrated leaks" were part of the
> > design
> > and built in adjustments are provided to deal with them....
> > Dave
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