Gearboxes & Gear Reducers for Pressure Washers

Connect your engine to your pump with professional gearboxes and gear reducers designed for pressure washer applications. Our selection includes General Pump, AR, and Interpump gearboxes in multiple shaft sizes and RPM ratings, plus replacement seals, gaskets, and accessories for maintenance and repairs.

Complete Gearbox Solutions

• Shaft Sizes: 3/4", 1", and 1-1/8" engine shaft configurations for various engine models
• RPM Ratings: 1450 RPM and 1750 RPM gearboxes matched to engine and pump speeds
• Major Brands: General Pump, AR (Annovi Reverberi), and Interpump gearboxes for reliable power transfer
• Replacement Parts: Oil seals, o-rings, gaskets, sight glasses, oil caps, and mounting hardware

Whether you're building a new pressure washer or replacing a worn gearbox, our inventory covers the essential components for connecting engines to pumps. Gearboxes reduce engine RPM to the optimal pump speed while providing proper alignment and power transfer. Replacement seals and gaskets ensure leak-free operation and extend gearbox service life in demanding commercial applications.

Looking for gearbox parts? Browse our gearbox replacement parts. Need pumps? Check out our pressure washer pumps and complete product catalog.