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Differential Pressure Tester With Master Orifice (Large Bore)

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Part# 12-02347
MFR Model# 2EM-60


The Model 2EM-60 Differential Cylinder Pressure Tester combines the features of the popular 2E tester and a Master Orifice into one tool. Now you can conveniently check your engine's leakdown rate against a calibrated standard to instantly determine if your engine's cylinder leakage is within the manufacturer's limits. 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.

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 the 2EM instead of this unit.
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WARNING: Cancer and Reproductive Harm -


Works great, havent used it yet

Ivan Verified Purchase


January 18, 2023

Works great!

Melody A Verified Purchase


November 26, 2021

All good except coronavirus non-sense. Long phone waits and inability to get in store in Wasilla.

David S
July 21, 2020

I bought this atvtgexOshkosh airshow. They sold me the one off the display because they didn’t have any left. After checking this site I realized there’s accesories as well as case that goes with it. Any chance of contacting someone about this?

Dennis L
August 5, 2023


Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

Q: Does this compression tester part # 12-02347 come with a current calibration certificate?

This pressure tester will have a calibration sticker on the unit. If you require the calibration certificate, it must be requested at the time of order and it will be a special order. Contact sales if you require the calibration certificate to set up the special order.

Q: What is the difference between this tester and the E2 tester ? Dose this do leak down and compression ?

They are similar, they are just made by different manufacturers. These only do leak down tests.

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