[alfa] Re: Spica Idle adjust O-ring

["Dean W. Cains" <dwc@xxxxxx>]

Hi Guys:

Sorry, but I think you'd have a tough time finding a Spica idle o-ring at 
any hardware store, or NAPA.  The part in question has a particularly fat 
cross section and small hole, more like a donut than a typical o-ring.  As 
the "donut" is compressed in its housing, the hole becomes smaller, and 
that's what restricts the air flow into the idle circuit.  It's also made 
of a fairly soft material, which allows it to be easily compressed, or to 
re-expand, as the adjustment is made.

It is also important to note that there is a special washer that fits 
between the o-ring and the adjuster screw, and without it, the o-ring will 
be shredded rather than properly compressed.  The setup also seems to work 
much better if all the parts are lightly lubricated with silicone 
grease.  Don't forget to loosen the pinch bolt before making any adjustments.

So, keep looking for the correct part, maybe checking with Centerline, Jon 
Norman, Wes Ingram, etc. until you come up with one.  Best to order a 
couple, as after a few years the one installed will become hardened and 
unusable.

Regards,

Dean
Lutz, FL
'74 & '87 Spider Veloce's
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