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This large jet is only found on the primary side of certain carburetors, including the ADFA, DGAV ("33B1" variant), and some DGV equipped with an idle control solenoid. It is designed to be held by the idle control solenoid assembly instead of a jet holder. The solenoid extends into the jet to shut off fuel flow when the ignition is turned off.
This jet measures about 0.155" diameter, larger than the more common 32/36 DGV/DGAV idle jet (Part No. 1587). Note the consistent OD where the air inlet hole is located in the side of the jet. The larger 4mm push-in flange will not fit in the standard idle jet holder.
The smaller (1/8" diameter) jet, which has a necked down portion around the side air inlet hole, is much more common than this large jet. The small jet is used on the secondary side of all DGV/DGAV/DGEV carburetors, the primary side of most DGV carburetors, the lone idle jet on the 34 ICT single-throat carburetor, and on both sides of several other Weber downdraft carburetors.
Jet sizes refer to the diameter of the fuel outlet hole. Larger size numbers indicate a richer idle mixture. The size of the air bleed hole in the side is fixed (no "F" number variation). Sold individually.
