I had the same problem (except that I'm the #@! who drilled the hole wrong
!) I tried 4 or 5 different throttle stop castings (including the one off
the other carb) and they all seemed to fit the same. Fortunately, I hadn't
cut the shaft to length yet, so I was able to switch ends and re-drill.
My conclusion : Apple made a boo-boo. Did you ask their opinion ?
Randall
On Wednesday, May 05, 1999 3:59 PM, Sumner Weisman [SMTP:sweisman@gis.net]
wrote:
>
> My newly rebuilt SU carbs were installed a couple of months ago and are
> working nicely. I used the TRF rebuild kits, which were fine. Prior to
> rebuilding, I sent the bodies out to a very popular company for rebushing
> and new shafts. That's where the problem came in, and I'm just passing
it
> along for information for others contemplating the same thing.
>
> When I got them back, they looked great and I started reassembling them.
> When I mounted the throttle stops to the shafts with new tapered pins, I
> noticed that, even with no adjustment screws installed in the throttle
> stops, the butterflies didn't quite close and the stops were bottomed
out.
> They were nearly closed, but I could see daylight and I sure didn't want
> them partly open when I was trying to adjust the slow idle speed. My
> conclusion was that the holes in the shafts were drilled slightly at the
> wrong angles.
>
> I had two choices. I could have sent them back, but of course I was in a
> hurry. So, I ended up drilling new holes through the shafts and the
collars
> of the throttle stops, about 90 degrees from the original holes. The
holes
> were drilled at the proper angle so that the butterflies not only closed
> completely, but there was now plenty of adjustment range for the screws
as
> well. That completely solved the problem, and everything works fine.
>
> The reason for this note is that I've been wondering if anyone else has
had
> this experience. Is there any possibility that there was a variation in
the
> angle of the original holes drilled at the factory in the throttle stops?
I
> suspect not, and that there was a just slight screw-up at the company
that
> installed the shafts. What do you think?
>
> Sumner Weisman
> 62 TR3B
>
|