SIXIWANZI Engine Compression Tester Kit 9pc — 0–300 PSI Gauge with Spark Plug Tester, Brass Adapters

The SIXIWANZI 9PCS Engine Compression Tester Kit is a complete diagnostic set that measures cylinder pressure up to 300 PSI and includes adapters plus a spark plug tester for cars, motorcycles, lawn equipment, chainsaws and outboards.

Whether you maintain vehicles at home or service small engines in the field, accurate cylinder pressure readings reveal the mechanical condition of pistons, rings and valves. This kit combines a dual-scale 0–300 PSI gauge, multi-size brass adapters, two rubber cones and a spark plug tester so you can quickly check compression across different spark plug types and engine sizes. Built for repeated garage use, the parts resist corrosion and the gauge has a shock-absorbing cover for everyday durability.

How do I use the kit to test engine compression?

Testing compression is straightforward: remove the spark plug, attach the appropriate adapter or cone to the hose, screw it into the spark plug hole, then crank the engine while watching the gauge. Use the built-in check valve to capture peak pressure and the one-hand release to safely bleed the gauge after recording results.

• Select the matching brass adapter (M10, M12, M14, M18) or rubber cone for non-threaded holes.
• Attach 14" hose between adapter and 3" dual-scale gauge (0–300 PSI / 0–20 Bar).
• Disable ignition and fuel where required, crank engine several revolutions and record peak PSI.
• Compare readings between cylinders and against manufacturer specs to identify wear or sealing issues.

What does the included spark plug tester check?

The spark plug tester is a simple visual tool for confirming whether the ignition circuit produces a spark under cranking conditions. It helps you distinguish compression-related problems from ignition failures so you can target repairs more efficiently.

• Connect the tester to a spark plug and ground the engine to observe flashing.
• A visible flash indicates the ignition circuit is firing; no flash suggests ignition or wiring faults.
• Use alongside compression readings to separate mechanical from electrical issues.

How accurate and durable is the compression gauge?

The gauge features a 3" dual-scale dial rated 0–300 PSI with a shock-absorbing rubber cover and scratch-resistant face for repeated shop use. A built-in check valve provides reliable peak-pressure locking so readings are repeatable, while the metal adapters are electroplated to resist rust in damp working conditions.

• Dual-scale dial for quick PSI or Bar readings and easy cross-reference to manuals.
• Shock-absorbing cover protects the gauge face from drops and knocks.
• Heat-treated steel and electroplated brass adapters extend service life under heavy use.

Which engines and vehicles are compatible with this kit?

This set was designed for broad compatibility: passenger cars, motorcycles, ATVs, small engines like lawn mowers, chainsaws and some outboard motors. Multiple adapter sizes and rubber cones let you work with threaded spark plug holes and non-standard openings common on garden equipment and two-stroke engines.

• Cars and light trucks with common spark plug thread sizes using brass adapters.
• Motorcycles, ATVs and scooters where compact threads are needed.
• Lawn equipment, chainsaws and small outboards using rubber cone adapters for non-threaded ports.

Who is this for: DIY mechanics, home-garage hobbyists and small-engine technicians who need a portable, all-in-one compression testing solution. If you troubleshoot engines regularly or want to confirm cylinder health before repairs or purchases, this SIXIWANZI kit delivers the adapters and readable gauge that make compression testing fast, repeatable and adaptable to many engine types.