This reliable diaphragm pump is ready to be integrated into any gasoline engine with 24 Ð 35 HP output and 1 1/8-inch shafts. Gear reduction is an included feature on the KAPPA-150/GR, so it is ideal for many different applications where precise engine responsiveness is required. All Udor pumps in the Kappa series are internally manifolded and feature dependable anodized aluminum construction.