Electronics International M-1 Primary Manifold Pressure

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Part# 10-25210
MFR Model# M-1


These Digital/Graphic Instruments are solid state and hold their accuracy over time and a range of environmental conditions. The colorful Graphic Analog display emits green, yellow, or red light enabling the pilot to spot problems immediately without interpreting a needle. The Digital display constantly provides an exact indication of each instrument function. Gauges mount in 2-1/4" instrument holes. These instruments (except fuel level) are STCd & TSOd for certificated aircraft.

The M-1 is a precision manifold pressure instrument featuring a 210 degree graphic analog display and a digital display. It measures absolute pressure in the engine's manifold to .1 inches of mercury on the digital display. The M-1 enables the pilot to make precise throttle adjustment for maximum performance during take-off, climb, and cruise. The M-1 is easily installed by connecting to the aircraft's existing line through a 1/4" flare union on the back of the unit. Backlit and operates on 12 or 24V. Wt. 13 Oz.

*IMPORTANT: Marking requirement form must be filled out at time of ordering. Please click the link below to download the PDF form. It must be faxed in to 951-372-0555 or emailed in before order can be processed.

E.I. products include all documentation and certifications

M-1 Configuration Worksheet (Required for Order)
California Prop 65 Warning Symbol

WARNING: Cancer and Reproductive Harm -

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Great gauge and easy install. However, unlike the EI tachometer this gauge does not come with an adapter plate. Order separately or wait another couple of weeks for shipping like I did. Spruce took care of it quickly for me.

Aaron M
December 4, 2023

Askar A Verified Purchase


May 6, 2022


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: Is the M-1 FAA Approved to replace the UMA gauge in Husky A-1?

Yes, this product is FAA TSO approved as a primary replacement in certified aircraft.

Q: Is this EI MP gauge certified as primary and thus able to replace original Cessna mechanical mp gauge?

This gauge is FAA TSO approved as a primary replacement in certified aircraft.

Q: What are the stock markings on the EI M-1 unit?

This unit does not have stock markings. You must fill out the configuration worksheet and indicate the required markings.

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