Briggs & Stratton Diaphragm Spring Cap – Replaces 221377, 690766

The Briggs & Stratton Diaphragm Spring Cap is a genuine OEM-style replacement part designed to fit and function exactly like the original. This component ensures proper pressure regulation and stability within the carburetor diaphragm assembly, maintaining smooth engine operation.

Engineered with durable, fuel-resistant materials, this spring cap helps extend the life of your carburetor and engine by keeping the diaphragm spring correctly seated and performing reliably.

Specifications & Features:

• Part Type: Diaphragm Spring Cap

• OEM Part Numbers: Replaces Briggs & Stratton 221377, 690766

• Brand Compatibility: Briggs & Stratton small engines

• Construction: Heavy-duty, fuel- and oil-resistant material

• Function: Holds diaphragm spring in position for consistent carburetor operation

• Benefits:

  • Restores proper carburetor functionality

  • Prevents poor fuel regulation issues

  • OEM-style fit for easy installation

  • Extends the service life of small engines

Applications:

• Briggs & Stratton carburetor assemblies

• Lawn mowers

• Pressure washers

• Tillers and other small outdoor power equipment

Replaces

• BRIGGS & STRATTON: 221377, 690766