50cc Pump Diaphragms (10pk)

The Advanced Engine Design 50cc Pump Diaphragms (10-pack) are precision rubber accelerator pump components engineered for Holley carburetor systems. This 10-piece set replaces worn or damaged diaphragms that regulate fuel delivery during acceleration, restoring responsive throttle response and consistent engine performance across a wide range of driving conditions.

The 50cc capacity specification refers to the pump displacement and matches carburetor models requiring this exact diaphragm size. Constructed from durable elastomer material, each diaphragm is manufactured to OEM tolerances to ensure proper fuel atomization and acceleration enrichment. The set format allows technicians to maintain a stock of replacement units, reducing downtime during routine maintenance or performance tuning. Rubber diaphragm integrity is critical—degraded or cracked units result in fuel delivery lag, hesitation off the line, and poor cold-start behavior.

Mechanics and engine builders working on carbureted systems—whether street vehicles, muscle cars, marine engines, or vintage restoration projects—rely on quality pump diaphragm replacements to maintain precise fuel metering. The 10-pack format serves both single-engine rebuilds and shop inventory needs. Regular inspection and replacement of accelerator pump diaphragms is part of sound carburetor maintenance, especially in high-heat or high-mileage applications where rubber components experience accelerated wear cycles.

These diaphragms are compatible with Holley carburetor platforms widely used in street and performance builds. For carbureted engine owners prioritizing reliable fuel delivery and smooth throttle response, maintaining a supply of OEM-quality pump diaphragms ensures consistent tuning stability and eliminates a common source of driveability complaints.

SKU: AED5337X | MPN: 5337X | Weight: 0.15 lbs | Dimensions: 4.1 × 1.65 × 4.15 in