Throttle Return Spring Kit - QFX Carbs

The Throttle Return Spring Kit for QFX carburetors is a precision dual-spring assembly designed to restore proper throttle plate operation on Quick Fuel carb-equipped engines. This kit is essential for street and strip engine builders who rely on QFX carburetors for consistent fuel delivery. It is particularly useful for those rebuilding a carb after extended service or upgrading worn components.

Constructed from hardened steel with zinc oxide plating, this carburetor spring kit ensures consistent throttle response by maintaining proper spring tension and preventing throttle blade sticking. The dual-spring design provides balanced return force across the full throttle travel range, which helps to minimize hesitation during idle and cruise conditions. The zinc oxide coating protects against corrosion in high-heat engine bay environments while ensuring fatigue resistance for thousands of throttle cycles.

This spring kit integrates seamlessly with Quick Fuel QFX carburetor platforms, delivering an OEM-level fit without modification. While it is designed for direct replacement of worn or damaged springs, it is recommended to remove the carburetor for installation. This ensures proper fitment and functionality, making it a reliable choice for maintaining throttle response precision.