Innova Compression Tester Kit — 4-Piece 2.5" Dual-Scale Gauge with 12/14/18mm Adapters, 15" Hose

Use this compact kit to measure cylinder compression quickly and reliably. The kit combines a clear Bourdon-tube dial, a 15-inch oil- and grease-resistant hose, a side-release bleed valve for repeated testing, and 12mm, 14mm, and 18mm adapters so you can work on most domestic and import vehicles as well as motorcycles and small engines.

How does the Innova 3612 tell me if an engine has internal damage?

The gauge reads peak compression for each cylinder so you can compare results across an engine. Low or widely inconsistent readings usually point toward problems such as worn piston rings, burnt valves, or head gasket leaks; higher-than-normal readings can indicate carbon buildup or timing issues.

• Dual-calibrated dial displays 0–300 PSI and 0–2100 kPa for easy interpretation.
• Accurate Bourdon tube meter movement for repeatable peak readings.
• Compare cylinder-to-cylinder numbers to spot anomalies quickly.

What adapters and hose features are included for fit and durability?

Innova supplies three threaded adapters—12mm, 14mm, and 18mm—so the kit covers most spark plug threads used in cars, motorcycles, ATVs, and marine engines. The 15-inch high-pressure rubber hose resists oil and grease, while the brass fittings and side-release valve allow you to bleed the gauge without disconnecting the hose.

• 12mm adapter for many motorcycles, ATVs, snowmobiles, and marine engines.
• 14mm and 18mm adapters to fit the majority of automotive spark plug apertures.
• Side-release valve lets you reset and repeat tests quickly between cylinders.

How easy is it to read and use the Innova 3612 on the bench or at the vehicle?

The 2.5-inch dial has large numerals and color-coded scales, making results readable in garages and low-light conditions. Its compact layout and durable materials make it suitable for occasional troubleshooting or regular shop use without complicated setup.

• Large dial face improves visibility during inspections.
• Color-coded scales simplify PSI vs. kPa reading at a glance.
• Quick-connect hose and bleed valve speed up multi-cylinder testing.

Can I rely on the Innova 3612 for different engine types?

The kit is designed for a wide range of engines—conventional, electronic, and computerized fuel systems—so it can serve both older and newer machines. While it provides strong diagnostic guidance, always combine compression readings with other tests and manufacturer specs for conclusive diagnoses.

• Works with domestic and import passenger vehicles plus small engines.
• Compatible with conventional, electronic, and computerized engines.
• Use alongside leak-down or fuel-system tests for full diagnostics.

Who this kit is for: technicians, home mechanics, and fleet maintenance personnel who need a reliable, portable compression tester that covers the most common thread sizes and delivers clear, repeatable readings. If you perform routine engine troubleshooting or prepare vehicles for repair, the Innova 3612 provides the gauge, hose, and adapters required to inspect cylinder health quickly.