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Home / Instruments / Engine Monitoring Systems / J.P. Instruments / EDM-350 /JPI EDM-350 Engine Monitoring System for Experimental Aircraft
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JPI EDM-350 Engine Monitoring System for Experimental Aircraft

18 Reviews 33 Answered Questions
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Overview

Intended for installation in experimental aircraft only

If all you want is EGT/CHT then the basic kits gives you everything you could want in a compact size with full customization features and the legendary JPI quality and accuracy. The Engine Data Management 350 system is the most cost effective, reliable piston engine experimental EDM instrument on the market. The basic kit includes:
  • EGT - Exhaust Gas Temperature
  • CHT - Cylinder Head Temperature
  • Included - Probes and Harness
  • VDC - Voltage
  • CLD - Shock Cooling on "All" Cylinders
  • ROP/LOP - Lean Find
  • DIFF - Engine Health
  • USB - Data Port built in
  • Data Record - 600 Hrs. at every 6 sec
  • EZTrends - Graphing software, including Google Earth Location
The compact Engine Data Management 350 system (3.5″ square) is the most advanced and accurate piston experimental engine-monitoring instrument on the market. The EDM 350 is not just another black box along for the ride. It is a Flight Engineer, Maintenance Manager, and Backup Instrument. For the price there is nothing that gets close to it. Customize with 17 options, including FF. You can think of the EDM 350 as your personal flight engineer. It’s always there, working in the background, constantly watching over your engine while you concentrate on flying the aircraft. You can make an entire flight without ever pushing a button, if you so choose. Yet your EDM will be monitoring your engine parameters three times a second and will warn you instantly if any parameter exceeds the programmed limit.

Optional fuel pressure functionality available. If selected, order form must be completed that is available under "Documents".

Difference between the Basic/ Full Package:
  • Full comes with the P5- has the capability of AMPS1, fuel pressure, fuel level/tanks, and volt2.
  • Basic package doesn't have any of the above options
   
California Prop 65 Warning Symbol

WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov.

Features

  • Improved engine efficiency
  • Reduced maintenance costs
  • Greater fuel economy
  • Reduced operating costs
  • Smoother engine operation
  • Proper engine temperatures
  • Longer spark plug life
  • Reduced engine vibration
  • 3 year Warranty
  • Selectable Positions for Linear gauges

Optional Functions

  • RPM - Engine
  • MAP - Manifold Pressure
  • O-T - Oil Temperature
  • O-P - Oil Pressure
  • F-P - Fuel Pressure
  • OAT - Outside Air Temp
  • TIT - Turbine Inlet Temp
  • CRB - Carburertor Temp
  • CDT - Compressor Discharge Temp
  • AMP - Current Amps or Load

Specifications

  • EGT 4 or 6 probes
  • CHT 4 or 6 probes
  • Volts
  • Shock cooling
  • LOP/ROP JPI Exclusive Leaning Mode
  • Fuel Flow (USED, Remaining, GPH
  • Endurance, GPS destination)
  • MAP
  • Oil Temperature
  • Oil Pressure
  • OAT
  • %HP (Requires: OAT, RPM, MAP, & FF )
  • Power connector
  • All required Harness
  • EZTrends
  • Data recording-100 hrs. Download USB
  • 1 GB memory stick
  • Selectable Positions for Linear gauges
  • 3 year Warranty
  • Optional functions
  • CDT
  • IAT
  • CARB Temperature
  • TIT
  • L-R Main - Fuel Quantity, L/R Main
  • V-2 - Second Volts
  • Amp-2 - Second Amps
  • % HP - Requires FF, OAT, and RPM
  • Fuel Flow - Fuel Flow includes:
  • GPH - Gallons per hour
  • REQ - Fuel Required
  • USD - Fuel Used
  • H:M - Endurance Hours and Minutes
  • MPG - Miles per gallons

Documents

  • Frequently Purchased With
  • Customers Also Viewed

Reviews

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Excellent

Tarrant C Verified Purchase

J.P. Instruments 3.25 EDM 350 4 Cylinder Full Package Non-TSO
May 15, 2025

Sergey N Verified Purchase

J.P. Instruments 3.25 EDM 350 6 Cylinder Full Package Non-TSO
June 2, 2023

Magaero L Verified Purchase

J.P. Instruments 3.25 EDM 350 6 Cylinder Basic Package Non-TSO
March 10, 2023

Magaero L Verified Purchase

J.P. Instruments 3.25 EDM 350 6 Cylinder Basic Package Non-TSO
March 8, 2023

expensive for what it is, and the extra sensor for oil and oil pressure are very expensive.

Aerodelta Verified Purchase

J.P. Instruments 3.25 EDM 350 4 Cylinder Full Package Non-TSO
January 8, 2023

Magaero L Verified Purchase

J.P. Instruments 3.25 EDM 350 4 Cylinder Basic Package Non-TSO
October 24, 2022

Magaero L Verified Purchase

J.P. Instruments 3.25 EDM 350 6 Cylinder Basic Package Non-TSO
October 22, 2022

Excellent product Use it for few weeks so far and it is nice to know each cylinders are balanced

Bernard T Verified Purchase

J.P. Instruments 3.25 EDM 350 4 Cylinder Basic Package Non-TSO
September 9, 2022

Magaero L Verified Purchase

J.P. Instruments 3.25 EDM 350 4 Cylinder Full Package Non-TSO
September 1, 2022

Magaero L Verified Purchase

J.P. Instruments 3.25 EDM 350 4 Cylinder Basic Package Non-TSO
August 23, 2022

Q&A

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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: Are any probes included with the JPI EDM-350 Engine Monitoring System?

Yes, the following probes and functions are included:

  • EGT - Exhaust Gas Temperature
  • CHT - Cylinder Head Temperature
  • Included - Probes and Harness
  • VDC - Voltage
  • CLD - Shock Cooling on "All" Cylinders
  • ROP/LOP - Lean Find
  • DIFF - Engine Health
  • USB - Data Port built in
  • Data Record - 600 Hrs. at every 6 sec
  • EZTrends - Graphing software, including Google Earth Location
Additional functionality is available. Probes and harnesses for these additional functions are sold separately. PDF worksheet located in the Overview must be completed and submitted with order.

Q: Interested in the JPI EDM-350. What is the cost for CHT probes, EGT probes and FF?

CHT and EGT probes are included. Fuel Flow must be ordered separately.

Q: This EDM 350 looks like an interesting system but there is no mention of required senders/probes and their cost. If it only takes the JPI senders used for certified installations then that would double the cost for the complete installation? If it accepts automotive senders than the cost would be much more attractive.

Different probes may work for this system but cannot be guaranteed. All testing was done with JPI probes and harnesses. Please see website for included functions as well as available optional functions.

Q: I was planning on using the Dynon unit, and have already installed their sensor kit. Will this JPI EDM 350 unit work with those sensors?

Different probes may work for this system but cannot be guaranteed. All testing was done with JPI probes and harnesses. We recommend using only JPI probes with the EDM 350. Please see website for included functions as well as available optional functions.

Q: Are probes for oil temp and oil pressure included with the JPI EDM 350?

No, these are available as additional options. EGT and CHT are the only probes that come standard.

Q: To order the fuel flow for the JPI EDM 350, it's confusing, do I have to order a separate transducer, and why do you ask if its for 201 or 231, there is no information anywhere about the fuel flow management to upgrade the 350, not even on JPI web site?

If this is a new install then yes you, will need to order the transducer. If you had a FS 450 and wanted to replace the unit with a EDM 350 you could use the older JPI transducer.

Q: Can the CHT probes be of the gasket type? Id like to install on a C90-16F engine (same basic engine as a C85 & O-200) How do you specify Gasket CHT probes?

You will need to specify this in the special instructions box when you add this to your cart. You can also specify this in the necessary order form that you send in at time of order.

Q: I have oil temp/pressure, MAP and Amp probes connected to analog gauges. Can these be used with the 350?

No, you can only use JPI probes with the EDM 350.

Q: I know this question has been asked more than once, but just to be clear, the basic unit comes with the appropriate number of EGT and CHT probes, correct? 4 cyl unit has 4 of each and 6 cyl unit has 6 of each?

Yes, that is correct.

Q: What is the difference between the JPI EDM 350 basic package and the the full package?

The difference between the basic and the full packages are the functions that are included.
Basic includes: RPM+EGT/CHT Bar Graph, Fuel Flow, Volts, OAT, Flight & Tach timer and Local & Zulu time.
Premium includes: RPM + 5 add'l Primary Functions, AND up to 5 non-primary functions, that can be displayed on a secondary page.

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