9590 Rotax 912 Differential Compression Tester. Find faulty cylinders quickly. Static test your Rotax 912 cylinder compression with 80 psi shop air. No cranking required. Just find TDC and pressurize cylinder to 80 psi. Left gauge allows you to regulate pressure with built-in regulator valve. Simply adjust pressure and slowly open built-in petcock and read differential compression. Pin point loss of ring compression (pressure exits crankcase) leaky exhaust valves, (pressure exits exhaust), or leaky intake valve (pressure exits Intake). Includes 12mm adapter that screws directly into spark plug hole and female pipe thread to accept hose.

• Differential Cylinder Pressure Tester Model E2A
• 12mm Adapter

Do these compression testers come calibrated?
Yes, these will come calibrated. It does not come with a calibration certificate but does have a stamp stating that it is calibrated from the manufacturer.