<VV> carbs / too high an idle / next step

[Jay Pitchford]

OK, I think I have it figured out. Looking down through it with the
air cleaner off, I can't see any liquid fuel spraying into #2 carb,
but #1 looks like Niagara Falls. That also sounds/feels like the aide
with the loping shudder. I see a stream of fuel dropping into the carb
from the four little jets. I have a neighbor who is uncanny with
carbs, and I'm hoping to catch him at home today.

On Sat, Sep 12, 2009 at 11:59 PM, Louis Armer <carmerjr at mindspring.com> wrote:
> Okay Jay, You have isolated the problem. Three things come to mind about
> this problem. Even if the engine was recently rebuilt
> the carbs may have sat around either on or off the engine and this may have
> allowed all the gas in the carbs to evaporate and cause varnish to form or
> small amounts of scaling of the pot metal in the carbs to form and sluff
> off. This is the least likely scenario in your case. Secondly, the throttle
> shaft of the carb may be binding because it is too large for the carb bores
> that it fits through. Thirdly and  most likely is misalignment of the
> throttle plate disc in the venturi of the carb. It could be upside down and
> this can be easily checked by examining if the notch in the throttle plate
> disc aligns with the square slot in the carb throat on the side of the
> throat right where the plate is when fully closed. If this is aligned then
> maybe the plate is not properly centered and the plate screws were pined as
> per rebuild instructions BUT the plate was not kept centered when the pining
> was executed. These little screws are brass, quite delicate and easily
> destroyed so don't do any checking of the carb on the engine. Remove it to
> your well lighted work area
> and carefully monitor the movement of the throttle plate to determine if
> this is your problem.
>
> Chuck
>
>
>
> At 05:49 PM 9/12/2009, you wrote:
>
> Chuck - thank you. I disconnected the secondaries, still hung up. Checked
> under the air horn (air filter assembly?) and no rub. Pulled it off anyway
> to see linkage better. Checked for plug wires, but no dice. Disconnected
> primary carb on the right/passenger side, still hanging up. Reconnected
> right, disconnected left/driver side primary, and bingo! Free travel. I
> manually lifted the left primary carb throttle linkage and it seems to be
> sticking. Going to FLAPS tonight or tomorrow for carb spray, but having
> serious doubts it's gunky. Engine was rebuilt before I bought it, but I
> suppose I might just get dumb lucky. I'm afraid there's a piece of something
> stuck down in there. It just feels like it when moving the linkage. It's not
> sticky/slow, but seems to hang at a particular spot, with no external binds
> that I could find.
> jcp
>
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