These are our Perkins 400 Series diesel engines for use in diesel generator sets. All new Perkins engines come with a 2 year, 2000 hour warranty. Please read our core return criteria and check out the Perkins Engine Number Guide to help you get the correct build. You can also fill out a quote form with all the information you currently have on your engine and we will reply very shortly with a quote or inquiring about additional info we may need. Refer to this photo of a Perkins Tag with the build list and serial number circled if you’re directly replacing your Perkins genset engine. Click the “Engine Info >>” links to check out power outputs for each model to help you understand what best suits your power needs and be sure to call us with any questions about generator end compatibility.