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Garmin GI 275 EIS Engine Indication System

Select Version:
With GEA 24 (Unit Only)With GEA 24 + 4-Cyl EGT / CHT / Oil Press PackageWith GEA 24 + 6-Cyl EGT / CHT / Oil Press Package



Replace analog engine gauges in your airplane with this advanced, cost-effective and easy-to-install engine indication system (EIS). So you can manage your engine operation and protect your investment.

With an installed interface module and sensors, GI 275 serves as an all-in-one primary EIS display for piston engine aircraft — so you can remove outdated analog gauges. Install dual GI 275 displays to monitor twin-engine aircraft.

The GI 275 main page displays engine, fuel and electrical data with easy-to-interpret color bands, bar gauge indications and numerical readouts. Your installer will configure your system for your aircraft with the appropriate indications.

Calculated percent power can be displayed at the top of each EIS page. Using sensor readings, this provides an estimated percentage of the maximum engine power for the current engine power settings.

Tap the temperature graphs on the main EIS page to enter the CHT/EGT page and view a detailed graphical display of cylinder head and exhaust gas temperatures, so you can pinpoint the optimal fuel/air mixture for efficient power management.

GI 275 automatically checks the EGT of all cylinders and identifies your preferred rich/lean setting to balance efficiency and performance. The CHT/EGT page also displays markings above each cylinder to indicate peak temperatures during leaning operations.

In NRM mode, the CHT/EGT page displays engine temperatures relative to a normalized value to increase indication sensitivity, so you can see trends quickly.

Configure your GI 275 EIS to show alerts you’ve set to prevent getting close to POH limits, including high CHT, battery voltage, oil temperature, high CHT cooling rate and more.

Color-coded pilot alerts/advisories, set up to POH limits, help maintain engine performance and safety. Flashing cues quickly identify out-of-limit exceedances.

To help you maintain control over aircraft maintenance and operating costs, engine data is automatically logged by GI 275 EIS and easily downloaded for review.

Pair with your GSB 15 USB charging hub to download engine data to a USB flash drive after your flight. Plus, charge USB-compatible portable electronic devices in flight with its dual ports.

With built-in Connext® wireless connectivity, GI 275 streams engine data to the Garmin Pilot app running on your compatible tablet or smartphone.

Upon landing, EIS data stored in the Garmin Pilot app is wirelessly uploaded to the flyGarmin website for viewing and secure storage. Or, you can upload it from your USB drive.

Your recorded data on your account can be retrieved and sent for third-party analysis to identify performance issues or maintenance needs in time to help avert more costly repairs later.

See total fuel on board plus quantities for up to four tanks, including two main and two auxiliary tanks.

Monitor fuel flow from the main page to track fuel efficiency and range — and view fuel pressure to verify optimal system operation.

GI 275 EIS monitors fuel flow and GPS information to estimate how much fuel, range and flight time you have left to go at current settings.

Customize the auxiliary page with up to four fields to display the additional EIS information relevant to your flight — including fuel used, UTC time, ground speed, range and more.

See your aircraft’s total Hobbs, Tach and flight time — as well as times for your current flight on the flight summary page.

View max RPM/temperatures as well as fuel and lean data updated dynamically throughout each flight on the flight summary page — then review after landing.


  • Width: 3.25" (82.6 mm)
  • Height: 3.25" (82.6 mm)
  • Depth: 6.44" (163.6 mm)
  • Depth with Connector: 7.40" (188.0 mm)
  • Unit Weight: 1.9 lbs (0.86 kg) to 2.4 lbs (1.1 kg)
  • Active Display Size: 2.69” diameter
  • Display Resolution: 480 x 433 pixels
  • Operating Voltage: 14/28 VDC
  • Operating Temperature Range: -20°C to +55°C
  • Altitude Range: -1,500 ft to 55,000 ft
  • Wi-Fi Class: 802.11b/g/n

In The Box

  • GI 275, Base
  • GI 275 Connector kit
  • GI 275 Product registration
  • GEA 24, Unit only
  • GEA 24 Connector kit
  • 4 (or 6) CHT Probe (494-70008-00) if package selected
  • 4 (or 6) CHT Probe Adapter (494-70008-01) if package selected
  • 4 (or 6) EGT Probe (494-70001-00) if package selected
  • 1 Oil Pressure Sensor, 150 PSIG (011-04202-30) if package selected
  • Other Sensor Kit Options: Standalone Sensor Kits (Base Unit Purchase Still Required)
  • Accessories
  • Frequently Purchased With
  • Customers Also Viewed


Havent actually turned it on yet, but, I must mention the following to potential buyers: If you are buying this with the probe kit you will at least need extension wire to go from the CHT and EGT probes to the GEA 24. Honestly, if you are considering this, buy it a few weeks before your installation is scheduled, so you can read the install manual and identify/gather all the parts/probes/resistors/fuses you will need to complete it. Were doing manifold pressure, fuel flow, fuel pressure, and oil temp, and Ive had to buy the sensors Garmin identifies in the manual for those (Spruce had them, hallelujah, love Spruce!!) Also, the GI275 install manual does not have the physical pin/plug identification for the GEA24. We found it in the GI275 maintenance manual: you will need it!

P. A
February 22, 2021


Please note, Aircraft Spruce Canada'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 Canada 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 the GI 275 EIS kit include the GAE 24 and all probes, shunts, transducers, connectors, etc., to complete an installation? Or is it the unit only?

It will include the GI275 the GAE24 and a probe kit with 4 or 6 CHT probes, 4 or 6 CHT probe adapters, 4 or 6 EGT probes, and 1 oil pressure sensor. Any additional probe or function wanted, will need to be purchased separately.

Q: Is GI 275 STCed for any twin? If so which one(s)?

We have posted the AML for the GI 275 in the Documents section. Please download and review there.

Q: Is there a part number for fuel flow option for the GI 275?

Per the installation manual revision 3 acceptable:
FT60 - part # 10-01196
FT90 - part # 10-01224
700900-1 - part # 10-27089
700900-2 - part # 10-27094

Q: What fuel flow probes are recommended for the GI 275?

Per the installation manual revision 3 acceptable:
FT60 - part # 10-01196
FT90 - part # 10-01224
700900-1 - part # 10-27089
700900-2 - part # 10-27094

Q: Does the GI 275 EIS measure Manifold pressure?

Yes, per the installation manual Rev 1 page 21: Manifold pressure can be measured using the GI 275 (Part 11-17865).

Q: My aircraft has AMPS/Volts, Cyl Temp, Oil Temp, Fuel Pressure, and OAT analog gauges and II believe I need to replace all these in order to be legal for flight. The only item that the GI 275 seems to be missing is Fuel Pressure. Is this an option that can be added and displayed on the main screen at all times?

Yes, fuel pressure can be added to this. There are a number of approved sensors per the installation manual.

Q: Will the GI 275 EIS work with capacitance probes instead of floats for measuring fuel levels?

This uses resistive floats or digital ones such as the CIES line of senders.

Q: Does the GI-275 show Total Tach Time? or only Engine Run time for that flight?

Based on the following, it does both. A start-up screen displays flight hours and engine hours, along with the Fuel Remaining Button. Flight hours are metered when airborne; if the MFI is not able to assess the air/ground state, flight hours are metered when the engine RPM exceeds 1,250 RPM. Engine hours are metered any time engine oil pressure exceeds 5 psi.

Q: Would it be possible to have the install manual posted so that we can find the appropriate sensors?

Garmin only provides the install manual post purchase. Once the order is placed, we can email the PDF.

Q: Can the GI-275 EIS use the GAD 13 as a OAT source on the canbus from an existing G5 install or does the GI-275 require a OAT probe in addition to the G5/GAD 13 probe?

Per the installation manual it will need its own probe.

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