Rotary Engine Compression Tester

OEM style Rotary Engine Compression Tester

Professional digital compression tester designed specifically for Mazda Rotary Engines.

This is the OEM style model – a reliable and accurate tool built exclusively for testing 

compression on rotary engines. Not suitable for piston engines. This Device is also 

available in a kit form for customers to build themselves, see DIY Rotary Compression Tester

Key Features:

• Specifically engineered for Mazda Rotary engines

• Compatible with: 10A, 12A, 13B, 20B, and 26B engines

• Includes high-quality lead and compression sensor

• Segment display with RPM compensation for accurate readings

• Robust construction suitable for workshop and track-side use

Important Notes:

• Battery not required - has allegator clips and lead to connect to vehicles 12v battery

• Does not have altitude compensation (see our Deluxe and Ultimate versions for this feature)

• Designed for rotary engines only – not compatible with piston engines

Package Includes:

• OEM Style Compression Tester

• Lead and compression sensor / power lead

• User instructions

This tester is an essential diagnostic tool for rotary engine builders, tuners, mechanics, and enthusiasts. Proper compression testing is critical for assessing engine health, apex seal condition, and overall performance.