Zenith 40 TIN carburetor pump diaphragm Porsche 911
$ 12.2
Part number: ST2378
Made in: EU
Zenith 40 TIN Carburetor Pump Diaphragm Porsche 911 MPN 7515
This pump diaphragm is used in the pump circuit of a Zenith 40 TIN carburetor. During throttle opening, diaphragm movement displaces fuel from the pump chamber to provide transient enrichment and help prevent hesitation during acceleration.
Correct diaphragm geometry is essential to pump-circuit operation. A hardened, torn, distorted, or incorrectly shaped diaphragm may reduce the accelerator pump shot, contribute to an off-idle or acceleration stumble, or allow fuel leakage at the pump cover interface. Replace the diaphragm during carburetor overhaul when the original part has lost flexibility or no longer seals correctly.
This replacement part is suitable for carburetor service and restoration work where the original component is worn, damaged, or missing.
Reference/MPN: 7515.
Technical role: Pump diaphragm for the Zenith 40 TIN carburetor accelerator-pump circuit, displacing fuel during throttle opening.
Service relevance: Replace a hardened, torn, distorted, or poorly sealing diaphragm that may reduce the pump shot or contribute to acceleration hesitation.
What Is Included
- Zenith 40 TIN carburetor pump diaphragm, MPN 7515
- Made in EU.
Important Fitment Note
Verify the carburetor family as Zenith 40 TIN and compare the MPN or marking with 7515 before ordering. Check the diaphragm’s perimeter mounting-hole layout, center boss and retainer geometry, seating surface, and pump-cover interface against the removed part. Confirm that the diaphragm fits the pump chamber without distortion and that the mounting face seals evenly.
Compare the replacement directly with the removed diaphragm before installation, especially if the carburetor has been modified or rebuilt with mixed components.
What you see is what you get
Show all parts
