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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