[TR] Stromberg autochoke enrichment needle

[Jeff Scarbrough]

Tim,

I have a water-choke carb off of a 78 or 79 Spitfire that I wont' be
using...if you send me a picture of the part in question, I'll check the
condition of mine.  If it's good, we can meet one sunny day in Greenwood,
and I'll trade the part for a sandwich.

Jeff Scarbrough
Corrosion Acres, Ga.

On Wed, Apr 22, 2015 at 10:30 AM, Tim Gaines <mtgaines at presby.edu> wrote:

> I've been dealing with an issue with the Stromberg 150 (with autochoke) on
> my 1980 Spitfire, getting some help from the Spitfire & GT6 Forum.  The
> engine starts easily, but during the end of the warm-up period when the
> rpms are coming down, there is a sudden drop to a near stall followed by a
> quick recovery and then a cycling of that pattern until the engine is fully
> warm.  Even then, the idle is a bit unsteady compared to what I am used to
> in my TR6.  Yesterday I came to the conclusion that the problem is that the
> enrichment needle in the autochoke is so worn on the slotted end that
> engages the pivot lever (controlled by the bi-metal spring--that thing is
> really complicated!) that the needle doesn't fully seat when the engine is
> warmed and may even vibrate in and out of position.  I have a carb from a
> parts car, but the needle in that unit is also badly worn.  I even found,
> to my surprise, that I had parts of another autochoke in a lot of old carbs
> I bought on Ebay some years ago, b
>  ut the needle there was worn too.  Apparently this wear is very common.
> New needles seem to be unavailable, but a member of the Forum gave me a tip
> on a good used one on Ebay, for $52.  Before I spring for it, I thought I
> would ask if anyone on this list has experienced a similar problem and
> traced it to the autochoke needle.  After all, I'm just working on a theory
> here!
>
> Also--and this is a long shot I'm sure--I'm wondering if anyone on the
> list has the needle in good shape that I could buy for a little less than
> $52.  If I were sure of solving my problem, $52 wouldn't sound so bad, but
> . . . .
>
> Thanks,
>
> Tim Gaines
> Clinton, SC
> 1980 Spitfire
> 1974 TR6
>
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