The Briggs & Stratton 391681 Carburetor Diaphragm is a genuine OEM-style replacement part designed to keep your small engine’s carburetor working efficiently. This diaphragm regulates fuel flow from the tank to the carburetor, ensuring smooth operation and consistent engine performance.

Built with fuel- and oil-resistant materials, this diaphragm restores proper functionality and helps prevent engine stalling, surging, or hard starts.

Specifications & Features:

• Part Type: Carburetor Diaphragm

• OEM Part Number: 391681

• Brand: Briggs & Stratton

• Material: Fuel-resistant diaphragm construction

• Function: Maintains consistent fuel delivery for proper carburetor performance

• Benefits:

  • Prevents engine hesitation and surging

  • Ensures reliable startup and smooth operation

  • OEM-style direct replacement for quick installation

  • Durable design extends engine life

Applications:

• Briggs & Stratton small engines

• Lawn mowers

• Pressure washers

• Tillers and outdoor power equipment

Replaces

• BRIGGS & STRATTON: 391681