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Pair of Early-Style Accelerator Pump Diaphragms
Replace worn or leaking accelerator pump diaphragms in compatible early-style Weber 40 and 44 IDF carburetors. This listing includes two early-style diaphragms, making it convenient for dual-carburetor installations or for keeping a spare on hand.
How to Identify the Early Style
The early diaphragm uses a spring-loaded center / plunger design. Early IDF accelerator pumps are typically operated by a cam-and-roller mechanism. Compare the diaphragm and pump mechanism on your carburetor before ordering rather than relying on vehicle year alone.
Why Replace an Accelerator Pump Diaphragm?
The accelerator pump provides an extra shot of fuel when the throttle opens. A worn, hardened, damaged or leaking diaphragm can contribute to fuel seepage, hesitation, stumble or a flat spot during acceleration. These symptoms can also have other causes, so inspect the complete accelerator-pump circuit, jets, fuel pressure and carburetor adjustment during diagnosis.
Features
- Pair of 2 early-style accelerator pump diaphragms
- Spring-loaded center / plunger design
- For compatible Weber 40 IDF carburetors
- For compatible Weber 44 IDF carburetors
- Alcohol-resistant / E-fuel-safe diaphragm material
- Useful for dual-carburetor service or keeping a spare
Fitment note: This is the EARLY style. Compare your existing diaphragm and accelerator-pump mechanism before ordering.
- MSRP: $14.95
- Brand: Pirate Mfg
- Color: Red
- Condition: New
- SKU: RS703-DE-E
- Manufacturer Part Number: RS703-DE-E
- Model: 40 IDF, 44 IDF
- Country of Manufacture: CN
- Amazon Shipping Template: Freeship48
- Items Included: 2 Early-Style Accelerator Pump Diaphragms
- Country of Origin: United States







