AUTOWN DIS-202GY Compression Tester Kit, 300 PSI Triple-Scale Gauge

The triple-scale dial displays pressure in PSI, BAR and kg/cm², making readings easy to interpret in the unit you use. The AUTOWN DIS-202GY kit includes several adapter styles for checking gasoline engines across cars, trucks, ATVs and small engines. Need a portable setup for the garage or a job site? Its organized grey case keeps the kit together for transport and storage.

Key specifications

• Gauge: Triple scale, 0–300 PSI, 0–20 BAR and 0–21 kg/cm²
• Engine type: Gasoline engines
• Threaded adapters: M10, M12, M14 and M18
• Other connections: Straight and curved rubber cone adapters, plus an extension hose
• Pressure release: Integrated quick-release safety valve
• Dimensions: 25 x 15.4 x 5.1 cm
• Weight: 699 g

The dial is designed to show peak compression readings, which can help assess engine condition and identify potential piston-ring wear or valve issues. A built-in Schrader valve sits inside the gauge, so the hose and adapters do not need a separate Schrader valve adapter. After testing, the one-handed release valve allows controlled depressurization, a practical feature when moving between checks.

Who it’s for

This kit suits vehicle owners, small-engine users and mechanics who want a manual compression tester for gasoline-powered equipment. It can be used when investigating engine health in a car or truck, or checking an ATV or small gas engine with the appropriate connection. The range of threaded and cone adapters gives the kit more connection options than a gauge built around a single fitting, while the extension hose helps reach the test point.

Buyer feedback is positive about the kit’s general function and build, though opinions on measurement accuracy are mixed. The dial’s three scales and the supplied adapters make the set useful for a range of diagnostic checks, take readings as measurements to inform an engine assessment rather than as a complete diagnosis on their own.

What’s included

The eight-piece compression tester set contains the gauge, four metal threaded adapters in M10, M12, M14 and M18 sizes, straight and curved rubber cone adapters, and an extension hose. The parts are stored in a portable grey case, helping keep the testing equipment organized between uses and ready to take from a home garage to another work area.

The tester is designed for gasoline engines, it is not intended for diesel or crude-oil engines. Match the adapter to the engine’s test connection, then use the quick-release valve to let pressure down in a controlled way after the reading. The included options make it possible to choose a suitable connection for different gasoline-engine setups without relying on one adapter style.

Final verdict

For anyone diagnosing compression across gasoline-powered vehicles or small engines, the AUTOWN DIS-202GY brings a triple-scale gauge, multiple adapter types and a controlled release valve into one portable kit. It’s a practical choice when you want to check engine pressure in the garage or carry the tools to the equipment, with the case keeping the components together between jobs.