4000 PSI Pressure Washer Water Pump 1 Horizontal Shaft Honda GX270 GX340 GX390. HONDA FROM GX270, GX340, GX390. 4.0 Gallons per Minute (GPM). 3/8 NPT - also has female disconnect. Fits many makes and models with the 1 Shaft. 4000 PSI / 4 GPM. It is the customers responsibility to make sure this replacement pump will fit on your unit. We usually respond within a few hours. We strive for 5-Star ratings and we will go out of our way to make you happy! We appreciate you taking the time to look at our product and will be honored to offer our services to you. This item is in the category "Home & Garden\Yard, Garden & Outdoor Living\Outdoor Power Equipment\Pressure Washers". The seller is "usapartsource" and is located in this country: US. This item can be shipped worldwide.