PA B18 Reduction Gearbox for 1" Shaft Engines

The PA B18 Reduction Gearbox is a professional-grade, Italian-made component that provides an economical yet high-quality solution for building or upgrading your pressure washer. This gearbox is designed to be a direct fit for powerful 1" shaft engines, such as the renowned Honda GX series, and is compatible with a wide range of pressure washer pumps. It offers an impressive 18HP maximum engine power rating, making it suitable for demanding commercial and agricultural applications.

With a 2.2:1 reduction ratio, the gearbox efficiently transforms a high-speed engine input of 3100 RPM to a much safer and more durable output of 1425 RPM. This lower pump speed dramatically reduces wear and tear on the pump's internal components, extending its service life and protecting your investment. By choosing this gearbox, you get the benefit of a premium, Italian-made product that delivers reliable, long-term performance.