Key Features

• Genuine OEM Diaphragm – Part 299637, manufactured to Briggs & Stratton original specifications for precise fit and dependable performance.
• Responsive Fuel Control – Diaphragm flexes with engine vacuum/pressure changes to maintain consistent fuel delivery and throttle response.
• Includes Spring in Many Kits – Spring provides correct tension and diaphragm action to support reliable pump operation.
• Durable Construction – Designed to withstand repeated movement, fuel exposure, heat and vibration.
• Clear Identification – Part Reference 299637 ensures accurate ordering and traceability.
• Fitment Guidance – Verify engine model/tag or compare with current diaphragm to confirm compatibility before ordering.

Product Details

• Product Type – Carburettor Fuel Pump Diaphragm
• Part Reference – 299637
• Included – Diaphragm (and spring in many kits)
• Compatibility Note – For selected Briggs & Stratton small petrol engines requiring part 299637; compatible with Vacu-Jet or similar carburettor fuel pump systems.
• Application – Regulates fuel delivery in the carburettor to support stable engine performance, smoother idle and improved throttle response.

Compatibility

• Briggs & Stratton 3.5 hp engines (often Sprint series)
• Briggs & Stratton 3.75 hp engines fitted with Vacu-Jet carburettors
• Other small vertical or horizontal shaft engines within the 3–4 hp class that originally used part 299637
• Typical equipment applications include push lawn mowers with compatible Briggs & Stratton engines, garden tractors/ride-on mowers, tillers, cultivators, power washers and generators equipped with these engines