Holley Carburetor Diaphragm, 30cc (black) Rubber w/o Screws

Holley 30cc Accelerator Pump Diaphragm - Part #135-5

Restore reliable accelerator pump performance with this genuine 30cc black rubber diaphragm. Designed for Holley, Barry Grant, and Demon carburetors, this durable replacement diaphragm ensures consistent fuel delivery and crisp throttle response. Constructed from high-quality rubber specifically formulated for petrol fuel applications.

Key Features:

• 30cc Capacity: Standard volume for most street performance applications
• Durable Rubber Construction: Black rubber material provides reliable sealing
• Wide Compatibility: Fits Holley, Barry Grant, and Demon carburetors
• Petrol Formulated: Engineered specifically for gasoline/petrol fuel systems
• Hardware Not Included: Allows reuse of existing screws or application-specific fasteners
• OEM Quality: Genuine Holley replacement part

Performance Benefits:

• Restores proper accelerator pump operation for crisp throttle response
• Eliminates hesitation and flat spots during acceleration
• Durable rubber material resists fuel degradation
• Maintains consistent pump shot volume
• Prevents fuel leaks from worn or damaged diaphragms

Compatible Applications:

• Holley performance carburetors with 30cc accelerator pumps
• Barry Grant carburetors with 30cc accelerator pumps
• Demon carburetors with 30cc accelerator pumps
• Street performance and racing applications using petrol/gasoline

Important Fuel Compatibility:

• Recommended For: Petrol/gasoline fuel only
• Not Recommended For: Alcohol-based fuels (methanol, E85, etc.)
• Reason: Rubber material may degrade when exposed to alcohol fuels
• Alternative: Use alcohol-resistant diaphragms for alcohol fuel applications

When to Replace:

• During carburetor rebuild or overhaul
• If experiencing acceleration stumbles or hesitation
• When diaphragm shows signs of cracking, hardening, or deterioration
• If fuel leaks are present at the accelerator pump cover
• As preventive maintenance during regular carburetor service

Installation Notes:

• Screws not included - reuse existing hardware or purchase separately
• Ensure pump cavity is clean before installation
• Check diaphragm orientation for proper operation
• Torque cover screws evenly to prevent leaks
• Verify pump arm clearance after installation

Technical Specifications:

• Part Number: 135-5
• Capacity: 30cc
• Material: Black rubber (petrol/gasoline compatible)
• Type: Accelerator pump diaphragm
• Hardware: Not included (screws sold separately)
• Fuel Compatibility: Petrol/gasoline only (not for alcohol fuels)
• Compatibility: Holley, Barry Grant, Demon carburetors

Fast dispatch from our Perth warehouse. In-store pickup available for local customers.