On 7/31/12, David Beierl <dbeierl@attglobal.net> wrote:
> At 05:26 AM 7/31/2012, Hector Zapata wrote:
>>I thought that was considered good for the mixture. Thirty-something
>>years ago I met a mechanic who was very proud of the way he adjusted
>>carburators, they frosted at idle, 80� weather...
>
> Where the air pressure drops in the carburetor
> venturi, the temp also drops, and in cool damp
> weather the moisture will freeze out on the
> inside of the venturi in a layer that builds up
> and gradually strangles the engine.  Then you let
> it sit for a few minutes and the engine heat
> melts the ice and you get to do it again.  I
> learned about this the hard way in Vermont
> mountains in my Fiat 128 which had a lever on the
> air cleaner with a blue arrow and a red arrow,
> but no indication in the manual about what it was
> for.  It finally dawned on me that sliding the
> lever toward the red arrow would pull in some hot
> air from around the exhaust manifold, so I did
> that and hey presto, no more trouble that trip.
>
> Yours,
> David
>
>

I didn't know that, thank you. I just had a flashback, my dad had a
1974 green Fiat 128, 2-door I think. That was a nice, simple car.

Hector