Re: [ihc] Re: Scout warm-up issues

["Ryan Moore" <baradium@xxxxxxxxxxx>]

----- Original Message ----- 
From: "Jim or Ginger Aos" <jaos@domain.elided>
To: "Tom Anderson" <ande1054@domain.elided>; <ihc@domain.elided>
Sent: Saturday, January 31, 2004 15:03
Subject: Re: [ihc] Re: Scout warm-up issues


>     A few posts back someone mentioned the icing of the carb.  A little
> later, maybe a day or two, my mind went back a few years (20+), and
> remembered how the updraft carb on my welder would ice up, even at 40+
> degrees F.  The crank start 4 cyl. Hercules was built the same year as I
> was, 1940.  To solve my problem, I placed a flexible hose over the intake
> into the air cleaner, then over to the exhaust manifold.  Problem solved!
On
> the 1310 with the 4bb Edlbrook, the air cleaner was modified by the PO.
The
> vacuum operated heat sensor was removed and canister was riddled with 1.5
"
> holes around the perimeter.  The guy probably thought that he could
improve
> milage by increasing air flow.  I think that I shall look for the proper
air
> filter housing.
>     The vacuum actuated deflecter hear sensor could be a possible area to
> check.  Also the tube that goes to the exhaust manifold shroud.  If this
was
> already mentioned and I missed it, I apologize for the overlook and waste
of
> time.  Jim A.
>

Don't think it was mentioned specifically, but I believe I said something
about how long it takes the manifold to warm p.  My scout is stock in that
regard.  Didn't have the tube when I started working on it, but I bought
some of the flexible metal tubing from the local parts house and it's
installed.  The flapper works correctly.  Doesn't seem like the exhaust
manifold gets warm all that quickly though...

Updraft carbs are fairly well known for carb ice in aviation circles.  Many
light airplanes use updraft or sidedraft carb.  Becuase there is no heat
rising from the engine they tend to ice up easier than in an automotive
application where downdraft carbs are common.

-Ryan


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