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

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

Marvin-

Thanks for the acc pump info.  As for the fuewl pump, it is brand new,
definitely pumping more gas through the lines, and holding pressure
overnight (as evidenced by the see-through filter between the pump and the
carb).  And this one does not want to start five seconds later sometimes,
not even wating overnight!   If I have just run it for a while, shut it down
to change something, then fire it right up, it still doesn't want to start
sometimes.  And yet, sometimes it WILL start if left sitting overnight
(though not often-and it usually doesn't sit overnight without me tinkering
with it a bit for more than a night or two, so it is hard to judge what
conditions stay the same and which ones are changing!).

It just seems that most carbs I have dealt with have squirted a visible
spritz of fuel into the carb if you look down in it while pumping the
throttle linkage.  I was thinking that was my issue.

Thanks for your suggestions.

Michael


> Joey
> I think the acc. pump prevents the delay or "cough" when you punch the gas
> pedal to the floor or just hard, rapid, acceration.
> As for needing a prime to start, your loosing your fuel pressure when the
> vehicle sits overnight and I believe that is the fuel pump-weak diaphram.
> just my 2 cents
> marv s (IHScoutlvr)
> ----- Original Message -----
> From: "Joseph Shaw, II" <josephshaw@domain.elided>
> To: "Allan Ericson" <lowvolt@domain.elided>; <ihc@domain.elided>
> Sent: Sunday, October 05, 2003 7:33 PM
> Subject: Re: [ihc] Yes, Me Again! Carb Question
>
>
> > 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