This differential pressure tester has a .060" orifice and is intended for use with engines whose bore diameters exceed 5" per AC43.13 REV 1B. However, Lycoming and Continental service specifications call for the use of a standard tester (with a .040" orifice) even if their engine's bore diameters exceed 5", and for those engines you must comply with the manufacturer's specifications and use a standard tester such as our 2EM instead of this unit.

Comes complete with on-off safety valve to eliminate blowback when disconnecting from the cylinder. Can be used to check intake or exhaust valves, cracked or worn rings, defective cylinders, worn bushings, etc. Specifications: Orifice size is .060". precision gauges matched to within /-2%. Includes 18MM Spark Plug Adapter, 24" pressure hose, and complete instructions. Protective form-fitted hard case included. Factory calibrated. Letter of certification available upon request. ATS Pro Lifetime warranty