DAYUAN Engine Compression Tester Kit for Automotives & Motorcycles

Wide compatibility: Includes M10, M12, M14, M18 fittings and 14mm/18mm spark plug adapters for a broad range of engines.

Clear 3-inch gauge: Dual-color scale reads 0-300 PSI and 0-20 kPa for quick, visual compression comparisons.

Fast startup checks: Two rubber cone ends enable quick compression checks without threading into the head.

Compact, portable kit: All adapters fit in a compact set for easy storage and on-the-go testing.

Multi-vehicle usefulness: Suitable for both automobiles and motorcycles, simplifying mixed-vehicle maintenance.

Rugged construction: Rubber seals and O-ring fittings designed to minimize leaks during testing.

Value-oriented package: A budget-friendly option that covers most common spark-plug diameters and hole depths.

Imprecise out-of-the-box: Several users report gauge variance (in one case around 15 psi) compared with reference readings.

Variable build quality: Some reviews note the overall feel is adequate but not premium for long-term professional use.

Not a replacement for high-end tools: Best used for ballpark comparisons rather than exact, professional-grade diagnostics.

Limited guaranteed accuracy across cylinders: Readings can differ between cylinders, requiring cross-checks for reliable conclusions.

Setup caveats: Effectiveness depends on user ability to access spark plugs and proper adapter seating; not plug-and-play universal.