Pinion Reverse Mount

The Quarter Master Pinion Reverse Mount starter pinion gear is a precision-engineered component designed for high-performance reverse rotation starters. This OEM-quality part (MPN 114263) serves technicians and enthusiasts who require reliable starter engagement for engines equipped with reverse-mount starter configurations. The pinion gear is engineered to deliver consistent engagement and disengagement cycles under demanding operational conditions.

Weighing just 0.24 lbs with compact dimensions of 1.4 x 1.2 x 4 inches, this pinion gear integrates seamlessly into reverse-mount starter assemblies without adding unnecessary weight to the engine bay. The precision manufacturing tolerances ensure proper mesh with the starter motor shaft and flywheel ring gear, critical for eliminating noise, wear, and starter drag—common issues when pinion geometry is compromised. Quarter Master's established reputation for starter components reflects decades of experience in both street and competition applications.

This replacement pinion is specified for engine builders, restoration shops, and powersports enthusiasts working on vehicles with reverse-rotation starter systems—a configuration common in certain high-performance and vintage applications where standard starter mounting would interfere with headers, intake manifolds, or custom engine bay layouts. Whether rebuilding a competition engine or restoring a classic vehicle, having the correct pinion geometry is essential for starter reliability and longevity.

Reverse-mount starters require precise component matching to function correctly. Substituting an incorrect pinion can result in poor engagement, premature wear on both the pinion and ring gear, and increased starter current draw. The Quarter Master Pinion Reverse Mount (SKU QTR114263) ensures proper geometry and material hardness, protecting both the starter motor and the engine's flywheel from the cumulative damage caused by mismatched components.