<VV> "BOUNCED NOTICES" and Carter YH issues

[Tony Underwood]

At 10:43 hours 04/14/2005, UltraMonzaWest at aol.com wrote:
>In a message dated 4/14/05 10:30:32 PM Pacific Daylight Time,
>hmlinc at sbcglobal.net writes:
>
>
> > So, NOW how many VV members are there?
> >
> >
>****************************************
>
>There WAS  1159   now  878





Maybe there should be an occasional reminder of how many  VV subscribers 
there actually are.     That way, whenever I post a boatload of idiocy on 
the list, I'll be reminded of how many people are watching me make an ass 
of myself...


Now that I have that out of the way:

A friend of mine is having hassles with his Carter YH carb ('63 
Spyder).   The carb was recently (last fall) powder coated, was carefully 
masked off by someone in the business who knew what he was doing, so I 
don't think anything got into the carb.  Atwood (owner) and I checked 
everything out closely when the carb went back together, found nothing out 
of the ordinary, everything looked very good, inside of the carb was like 
new, rebuild kit  went in with no problems, installed back on the car and 
it started right up and ran fine without even being touched.

It had been running well, then it began misfarctioning slightly in that a 
touchup of the idle mixture screw did nothing.   In fact, I could tighten 
it to the stop, no change, idle never budged.   Likewise unscrewing the 
thing until it was almost falling out.  No change in the idle.   However, 
the engine continued to run well, smooth idle (for a '63 Spyder) so as 
Reagan said, if it works don't fix it.    Puzzling, but Atwood said not to 
bother with it unless it showed a problem in running, which it obviously 
did not what with Atwood always grinning about the car and mentioning 
something about "runs like a scalded-ass dog".    After a week more of good 
running, the car was placed in winter storage.    Then a couple weeks ago, 
the car went back on the roads again, springtime etc.    No problems, 
running good.    For two weeks...

Now Atwood has some troubles.   After enjoying smooth running with no 
problems, suddenly when attempting to leave the tech session last Sat the 
engine quit and didn't wanna restart.   Pump the gas vigorously and then it 
started but quit immediately if you took your foot off the gas.   Attempts 
to make it idle by slowly backing off the throttle would result in a 
gasp/gag and a sudden coast-down until stop, unless you got back on the 
throttle immediately, usually accompanied by a backfire.

No idle circuit operation at all.

Now:   First thing, I grabbed up a can of carb cleaner and blew it through 
the idle mixture screw hole, smooth idle returned.   We messed with it a 
minute or two, seemed like it was OK.   Still no effect at all when the 
idle mixture screw was turned....  Atwood left for home, car ran well until 
he got within a block of his house and it did it again, had to limp it to 
the driveway whereupon it quit immediately just like before.   I kinda 
figured that sooner or later the carb was gonna have to come apart 
again.   I suppose it's gonna  be sooner.

Anybody seen a problem like this in a YH?    Most troubles I've seen always 
ended up being too rich or pump diaphragm problems or float issues or 
warped bowl/top cover etc etc, first time I've seen the idle circuit simply 
quit on a YH.   We popped the top off the carb (which remained on the 
engine) and inside it was clean as a whistle, blew through the idle mixture 
passages and air bleeds etc, watched the main jet bubble and spurt etc, all 
seemed normal.    Still no idle circuit operation at all.   It's time to 
dismantle the carb *again*, probably tomorrow.

Somewhere, I have a diagram of the fuel metering circuitry of a Carter 
Y...  if I can find it.    Anybody know of anything of that sort on the Web 
I could check out in the meantime while enjoying my home made Jambalaya for 
lunch...?


tony..