Re: [ihc] Yes, Me Again! Carb Question

["Joseph Shaw, II" <josephshaw@xxxxxxxxxxxxx>]

Allan-Man, you are on top of things!  You are always the first to answer
these questions of mine!  Many thanks!

The style of acc pump it sounds like you are describing is the type I am
used to from my older IH's, but this one is different.  IT has a small
"sheet" of metal with three different sets of slots in it.  There is a
samall arm attahed to the accelerator linkage that is bent on the end, and
fits through one of these slots (different ones give different levels of
actuation).  I have looked very carefully at mine, and it just doesn't do
anything within the confines of the amount of movement of the throttle
linkage in the slot it is in-slides back and forth but never touches the end
of its slot.  Obviously, by moving to another slot, or by bending the arm, I
could elicit a response.  This type of carb is a holley, but has the arm for
the acc pump on the top of the carb, and it actually pushes in through the
side.  I have seen these types before, and seem them on Scouts before, but
never dealt with one.  I assumed it was a stock config, as it looks all
original and stock in the linkage department, but maybe someone changed out
the stock one?  Anyone know?  This has the front bowl but it has the
removable top when disassembling, instead of the bowl that screws in from
the front.

So, just trying to clarify in case that makes a difference.  Obviously, this
type of set-up has more than 1/32" or it would react when I fully depress
the throttle.

Would any of this (lack of acc pump actuation) cause the "popping and
spitting" I describe?

Thanks!

Michael


> Michael-
>
> There's an arm that operates the accelerator pump. It pushes down on a
lever
> that pivots upward and squeezes the pump from the bottom.
>
> At idle, there should be 1/32 of an inch of clearance between the lever
and
> the actuator arm. It sounds as though you have too much clearance. Check
it
> and see.
> ----- Original Message -----
> From: "Joseph Shaw, II" <josephshaw@domain.elided>
> To: <ihc@domain.elided>
> Sent: Sunday, October 05, 2003 3:10 PM
> Subject: [ihc] Yes, Me Again! Carb Question
>
>
> > Okay-made some advances.  The Scout does not seem to want to start on
its
> own
> > right now-needs a dribble of fuel or a spray of starting fluid-but once
> > started, it runs much better, sounds pretty good, etc.
> >
> > If I depress the throttle linkage while it is off, it gets no shot of
fuel
> > down the barrels.  If I directly "pry" the accelerator pump linkage by
> hand,
> > it DOES spray fuel down into the barrels of the carb.  So, this is the
> same
> > question I asked about two days ago-is this an issue?  I thought so, got
a
> yes
> > answer, and a couple that I thought were more along the "no" line.
> >
> > It does run better-seems to be best advanced about 7 degrees at start
and
> > idle.  However, when it does start to slow down to idle, or after
running
> a
> > few minutes when RPM's start to slow down a bit (auto choke working), it
> DOES
> > again start to spit and "pop" at the carb.  Not only does it do this,
but
> it
> > shoots a small spray of fuel out of the carb in an UPWARD direction-out
of
> two
> > small holes pointed in an upward direction.  These seem almost like a
> > "release" valve that, when it pops, it builds some kind of pressure in
the
> > carb itself, and sends a small spray streaming upward (not down on the
> barrels
> > to "vaporize").  Does this give anyone a better idea of what is going
on?
> >
> > I certainly don't mind rebuilding it if that will help, but have never
> > encountered these symptoms, and am trying to find exactly what is wrong.
> I
> > have rebuilt many Holleys (though all older than this one), as well as
Dan
> > Nees favorite Carter Thermoquads, and feel very capable of this task,
but
> > don't want to do it if it is unnecessary.  The people I bought the Scout
> from
> > claimed they put a new (rebuild, I would guess from appearances) carb on
> it
> > when they got it in March, and claimed it ran well for them then, though
> they
> > never drove it much, and it has sat for about six months since last
> started.
> > They seemed very honest, and I trust them on this point, and this
doesn't
> seem
> > long enough for the carb to really screw up majorly, but I suppose it is
> long
> > enough for those little openings to gum up and plug.
> >
> > So-go ahead with a carb rebuild, or does this problem seem to arise from
> > somewhere else to you guys?
> >
> > Thanks again for all the help-I don't mean to be a pest, but today was
the
> > first FREE day I have had to work on it, and I am currently driving a
> loaner
> > truck from a friend of the family-only have about a week left before I
> have to
> > return it, so need to get this Scout running ASAP!
> >
> > Thanks for any suggestions!
> >
> > Michael