All used engines have been run and tested to run (unless described as a "core"). No compression or leak down tests have been performed. Engines have been visually inspected for leaks, cracked blocks & etc. however no warranty is given. All engines are sold AS IS. Feel free to call my shop at 419-625-0605 with your questions or to have any service performed on the engine you choose. All services will be charged at our current shop rate. The description will be VERY accurate.