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OEM quality idle mixture screws and springs for automotive and marine Rochester Quadrajet 4 barrel carburetors. Unfortunately there is no data that can match the idle mixture screw to a specific carburetor number, so the idle screws are listed by size. If you still have your old idle mixture screw, compare it to our new screws. Except for the later metric screws,(metric screw heads are of the ?double D? design) all other screws are 10-32 thread. The difference in the screws are length, tip taper and head design. An idle screw with a longer taper will give you more ?feel? when adjusting the idle air/fuel ratio than a short taper screw.

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Idle Mixture Screw- 10-32 x 1.311" (#2010G)

10-32 pitch thread
1.311" Overall length
Thread size: 10-32
Qty: 1
Head Diameter: .255" Applications:
Carter BBD carburetor
Rochester 2G Carburetors…see more

Part Number
2010G
Idle Mixture Screws - (#2003A) Metric Hex Head Replacement

Replacement Hex-Head metric idle mixture screws, easier to adjust idle mixture than original "Double-D" head. Uses a common 3/16" hex…see more

Part Number
2003A
Idle Mixture Screws (#2002)


Two replacement Quadrajet idle mixture screws. Use in conjunction with Q2021 springs....see more

Two replacement Quadrajet idle mixture screws. Use in conjunction with Q2021 springs.
1.26" overall length.
Quantity: sold in pairs…see more

Part Number
2002
Idle Mixture Screws and Springs, # 17062905 (#2003) metric


M4 x .50 pitch thread, 1.263" overall length...see more

Pair of replacement Quadrajet screws with matching springs, fits 1979 and later Quadrajets.
M4 x .50 pitch thread (Metric)
1.263"…see more

Part Number
2003
Idle Mixture Screws for Rochester & Carter (#2009C)


Pair of replacement idle mixture screws. 10-32 pitch thread...see more

Pair of replacement idle mixture screws.
10-32 pitch thread
1.600" overall length
Qty: 2 screws Fits the following carburetors:
Carter Thermo-Quad…see more

Part Number
2009C
Idle Mixture Screws, # 7048854, 7048858 (#2001)


Two replacement Quadrajet idle mixture screws....see more

Two replacement Quadrajet idle mixture screws. Use in conjunction with part #2021 springs.
1.74" overall length. Replaces Rochester OEM part #…see more

Part Number
2001
Idle Mixture Screws, 10-32 x 1.85" (#2003B)

Two replacement Quadrajet idle mixture screws. Use in conjunction with part #2021B springs.
1.85" overall length. Replaces Rochester OEM part #…see more

Part Number
2003B
Idle Mixture Screws, 10-32 x 2.05" (#2003C)

Two replacement Quadrajet idle mixture screws. Use in conjunction with part #2021B springs.
2.05" overall length. Replaces Rochester OEM part #…see more

Part Number
2003C
Limiter Caps for Idle Mixture Screws


Idle limiter caps originally used to limit idle mixture adjustment. Idle mixture screw...see more

Idle limiter caps originally used to limit idle mixture adjustment. Idle mixture screw shown in picture is not included. Quantity:…see more

Part Number
2011
Rochester Idle Mixture Screw,  # 7048532 (#2006G)


Qty: 1, 10-32 pitch thread, 1.75" overall length...see more

Replacement Rochester idle mixture screws.
10-32 pitch thread
1.75" overall length
Qty: 1 Replaces OEM part # 7048532 Fits:
Rochester Quadrajet Carburetors…see more

Part Number
2006G
Spring, Idle Speed / Fast Idle

Spring is used on the curb idle speed adjustment screw. Also used on Fast Idle screw on Rochester carburetors. Fits:
Rochester…see more

Part Number
2041
Springs for Idle Mixture Screws

Fits:
Rochester Twojet (2G) carburetors
Rochester Fourjet (4G) carburetors
Rochester Quadrajet carburetors
Rochester "B" carburetors
Rochester H carburetors
Rochester Monojet…see more

Part Number
2021
Springs for Idle Mixture Screws

Quantity: 2 springs
Length: .1/2"
Outside diameter: .268"
Wire diameter: .032" Fits:
Carter WCFB carburetors
Carter BBS carburetors
Carter W1 carburetors…see more

Part Number
2021E
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