Genuine Weber carburetor parts - en - USD WEBER 48 IDF Auxiliary Venturi replace size 4.5 - en - USD

WEBER 48 IDF Auxiliary Venturi replace size 4.5

$ 39

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Part number: 71124.450

Manufacturer: FAJS

Compatible with:

Family: WEBER

Family: DCNF

42 DCNF 31-32 - pn: 31966.002 (2 pcs)

Family: IDF

36 IDF 44-45 - pn: 69002.450 (2 pcs)

36 IDF 44A-45A - pn: 69002.450 (2 pcs)

36 IDF 52-53 - pn: 69002.450 (2 pcs)

36 IDF 56-57 - pn: 69002.450 (2 pcs)

40 IDF 28-29 - pn: 31966.002 (2 pcs)

40 IDF 42-43 - pn: 71102.450 (2 pcs)

40 IDF 60 - pn: 69002.450 (2 pcs)

44 IDF 20-21 - pn: 31966.002 (2 pcs)

44 IDF 26-27 - pn: 31966.002 (2 pcs)

44 IDF 38-39 - pn: 71102.450 (2 pcs)

44 IDF 40-41 - pn: 71102.450 (2 pcs)

44 IDF 61 - pn: 71102.450 (2 pcs)

48 IDF 3-150 - pn: 71124.450 (2 pcs)

48 IDF 6 - pn: 71124.450 (2 pcs)

Family: DCN

40 DCN 14 - pn: 31966.002 (2 pcs)

40 DCN 17 - pn: 31966.002 (2 pcs)

40 DCN 18 - pn: 31966.002 (2 pcs)

WEBER 48 IDF Auxiliary Venturi Replacement - Size 4.5

This auxiliary venturi is used inside a Weber 48 IDF carburetor to create the pressure drop that draws fuel from the main circuit as airflow increases. Its internal profile influences main-nozzle signal strength, fuel atomization, mixture progression, and transient response during acceleration.

Size 4.5 auxiliary venturi for Weber 48 IDF carburetors.]

A damaged, loose, missing, or incorrectly sized auxiliary venturi can affect main-circuit activation and fuel distribution between the carburetor throats. This replacement is identified by MPN 71124.450 and is intended for service replacement where the existing Weber 48 IDF venturi matches the same size and locating geometry.

This replacement part is suitable for carburetor service and restoration work where the original component is worn, damaged, or missing.

Reference/MPN: 71124.450.

Technical role: Size 4.5 auxiliary venturi for a Weber 48 IDF carburetor, identified by MPN 71124.450.
Service relevance: Provides a replacement for a damaged, loose, missing, or incorrectly sized auxiliary venturi in the main fuel circuit.

What Is Included

WEBER 48 IDF auxiliary venturi, size 4.5, MPN 71124.450

Important Fitment Note

Verify the carburetor family and compare the 4.5 marking with the auxiliary venturi removed from the carburetor. Check the venturi’s overall shape, locating tabs or keys, seating surfaces, bore alignment, and retaining interface before installation. Also confirm that the replacement seats correctly in the carburetor body without looseness or interference.

Compare the removed part directly with this venturi before fitting; size alone does not confirm matching geometry or retention details.

What you see is what you get

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