(1) Cover should be put on with the whole offset
towards engine side of carb.
(2) The Needle Clip (963 500) MUST be located below the Spring Cup (827
347). Misplacing the Needle Clip will result in a rich range tuning of the
carb.
(3) Window must be in the bottom of piston on the engine side, 4.4mm wide x
3.8mm high.
(4) There is currently a blocked jet for primer use. Be sure that it stays
plugged.
(5) These parts will not work with older versions of same parts (5- #963 500
and 6- #827 347).
The new numbers must be used as a set.
BING MAIN JETS The main jets on the Bing carb are
replaceable. It is recommended that they be replaced if they are
found to be plugged. This can happen when the carb is left with fuel
in it for long periods of time. The fuel turns to sludge which plugs
the jet. In this situation it is NOT recommended that the jet be
cleaned and reused. Main jets start at #120 increasing in increments
of 5 to #220 - exceptions are #142/148/152/158/162 CHECK
BING JET CHART FOR CORRECT JETTING FOR YOUR ENGINE
BING IDLER JETS The idler jets on the Bing carb are replaceable. It
is recommended that they be replaced if they are found to be
plugged. this can happen when the carb is left with fuel in it for
long periods of time.
The fuel turns to sludge which plugs the jet.
In this situation it is NOT recommended that the jet be cleaned and
reused.
Idler jets start at #30 and increase in increments of 5 to #70
Note on the 582 and 503 DUAL carb Rotax engines we have
found that a decrease in the idler jet size provides a smoother
engine idle.
Bing Needle Jet
We have found that on the
582 Rotax switching to a larger needle jet helps prevent hot spots
in the engine between 5200 and 5800 rpm. It also helps prevent
engine surging in the same range on the 532 Rotax.
BING JET NEEDLE (2)
THE NEEDLE JETS (5)
The jet needle and clip should be inspected on a regular basis for
wear. Wear occurs in the area where the clip rides. Failure of the
clip and or needle will cause the needle to:
A) lower itself causing a LEANER fuel mixture or
B) the needle will fall down into the bottom of the carb causing
loss of power.
C) cause erratic engine performance as the needle bounces up and
down.
Needle clip part # 963 500 (3) Bing
Carb advisory - needle and clip failure!
Click on diagram for larger view of parts.
Cable Grommet
While this may not look
like a very important part of the Bing carb it plays a significant
role in preventing water from entering the carb bowl. With these
grommets damaged or missing water or dew on the cable will follow
the cable down into the float bowl.
It is recommended that these grommets be replaced at the first sign
of cracking.
Sieve Sleeve
It is important that the
sieve be in place and not damaged. This is not a filter or screen.
It's purpose is to convert foam back into fuel.
During rough
operations the fuel in your float bowl with foam. When you pass foam
through a screen it turns back into fuel. With the sieve in place
over the main jet of your carb no foam can form causing misfiring
etc.
BING FLOATS
The floats should be checked for damage and leakage. To do this
remove the bowl from the carb fill it full of fuel. Place the floats
in the fuel on their stems - leave them for about 30 minutes and
then check to see if both floats are at the same level. If one has
sunk it MUST be replaced.
Needle valve with viton tip
This needle allows fuel in
and shuts it off at the needed rates and times. If damaged it no
longer seats and fuel will vent from the overflow tubes of your
carb.
It is a recommended yearly replacement item or at the first
signs of problems
Float bowl gasket
The float bowl should be removed regularly to
check for water and debris. It is suggested that you have spare
float bowl gaskets handy incase they are damaged or have failed
from age.
Ultralight Aircraft News Web Magazine PO Box 1710 Holland Landing
Ontario Canada L9N 1P2 647-723-8767.
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BING MAIN JETS 
be
plugged. this can happen when the carb is left with fuel in it for
long periods of time. 
Bing Needle Jet
BING JET NEEDLE (2)
THE NEEDLE JETS (5)
Cable Grommet
Sieve Sleeve
BING FLOATS 
Needle valve with viton tip
912
Intake sockets (New Style) 