The mounting holes are 2 5/8 center to center & 1 7/8 from center shaft hole to outer holes. Please make sure you have at Least a 5 HP 3/4 Crankshaft engine before purchasing. These pumps are easy to install and have great pressure for the price.The pumps are prefilled with oil and factory sealed. Will Fit many brand pressure washers. Briggs and Stratton, Generac, Craftsman, Honda, John Deere, Mi-T-M. TroyBilt, Karchar, Titan, and Many others. Excludes freezing and cracks and debris blockage. The item "3000 PSI NEW POWER PRESSURE WASHER PUMP FOR GENERAC 01443-0 FREE KEY" is in sale since Friday, July 28, 2017. This item is in the category "Home & Garden\Yard, Garden & Outdoor Living\Outdoor Power Equipment\Pressure Washers". The seller is "icanfixitorsellit" and is located in Reinholds, Pennsylvania. This item can be shipped worldwide.