Description

The Yato Flex Drive Compression Tester is a diagnostic tool used to measure the compression pressure inside the cylinders of a spark‑ignition engine. It includes a flexible hose and adapter tips (rubber conical and threaded M14/M18) to fit spark plug sockets — even if they’re recessed — making it easier to access cylinders on tight or awkward‑engine layouts. Its analog gauge reads up to 21 bar (about 300 psi), giving a clear indication of cylinder health and helping detect issues like worn piston rings, leaking valves, or head‑gasket failure. The tester’s compact, robust build and flexible hose make it a practical choice for both professional mechanics and DIYers performing routine engine diagnostics or pre‑purchase checks.