JPI FS-450M-3 For Twin Engine Aircraft 3-1/8

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Part# 10-03692
MFR Model# 450000-M-3


The Aviation Consumer, Product of the Year. JPI’s FS-450 is top choice because it has all the options you need for fuel management.

Available for piston engines. TSO'd for accuracy the Fuel Scan-450 acts as your personal flight engineer: always there, working in the background, constantly monitoring you fuel consumption while you concentrate on flying the aircraft.

JPI’s piece of panel wizardry relegates fuel-situation questions to relics of the past. With a 3 1/8 inch display, its home between the top row of flight instruments and the top of avionics stack, the FS-450 blinked and winked the numbers to answer all my fuel-situation questions.

Connected to Honeywell Skymap IIIC, the FS-450 happily winked and blinked its way through its information inventory.


  • Fuel Used (USD): How much fuel has been used since you last refueled. This number will always become larger as fuel is consumed. You can instead show the fuel used on a long multi-fuel stop flight and we will see later in this video how to do that.
  • Fuel remaining (REM): How much total fuel remains in the aircraft. Only total fuel remaining in the aircraft is calculated.
  • Hours and minutes remaining (H.M.): Based on the current fuel flow rate, displays the remaining endurance time. This parameter is most meaningful during cruise. During sea-level climb the fuel flow rate will be almost twice that of cruise and the endurance indication will be about half of actual. On the other hand, during a power reduction descent, the endurance will indicate more time than is actually available when flying at cruise power.
  • Fuel Required to Waypoint/ Destination (REQ): This parameter will be displayed only if your EDM is receiving flight data from your GPS (this is a standard feature which is included with the Fuel Flow option). This will tell you how much fuel is required to get to the next waypoint or destination programmed on your GPS, based on your current fuel flow rate and present position.
  • Fuel Reserve (RES): Fuel reserve when you arrive at your next waypoint. This parameter will be displayed only if your EDM is receiving flight data from your GPS (this is a standard feature which is included with the Fuel Flow option). This will tell you how much fuel reserve you can expect when you arrive at your next waypoint or destination programmed on your GPS, at the current fuel flow rate.


  • DUAL (2) Bright Displays showing GPH, all the time. Brand-X’s FP-5L has one LCD display, (gray on gray) showing either-or type situation. FP-5L/FP-5 is NOT TSO’d, display turns black at TSO temperatures. FS-450 passed TSO-C44b and Operated at -67 °F to +180 ‘9F.
  • FAA TSO for Reliability and Accuracy, a 3 year warranty.
  • Talks to all GPS’s including Garmins 430/530 and all handheld’s etc. Displays gallons required to next waypoint or destination at no additional cost. FP-5L does not report “gallons to destination”. FP-5L does not work with a “handheld” GPS.
  • Programmable display for Gallons, Pounds, Liters. No imperial gallons.
  • Remote “Warning Light” programmable with Low fuel and low time warning.
  • Automatically calculates K- factor for excellent 1% accuracy.
  • Return line systems (Pressure Carburetor) and gravity flow, no problem.
  • Clock size, 1.5″ deep, 3 1/8″ hole, 5.0 oz. wt.,Transducer 3 oz. wt.
  • TSO’d for use in turbo-prop aircraft.
  • When your, El, Hoskins, or Shadin fails upgrade it to destination an FS-450 using old transducer.
  • Automatic reminder (flashing digits) to update Fuel added. Fuel added Can be set after take-off not possible with the FP-5L/FP-5
  • “USED” Total fuel used can be set to zero at any time during flight.
  • Twin and Single FS-450M instrument.
  • %HP Calculated on fuel burn.
  • Timer included
  • Frequently Purchased With
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Works great

Kenny D
November 24, 2020


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: Can the JPI FS 450 series of instruments be used for primary fuel flow?

No, the FS 450 series cannot be used as a primary fuel flow replacement. You will have to keep your original equipment.

Q: Does this item as listed include transducers?

Yes, the twin model comes with two transducers.

Q: Is it possible to request 'front'-'rear' instead of left-right on the JPI FS-450M gauge?

Per JPI, the FS-450M comes with the words Left and Right printed on it and it cannot be changed.

Q: Can the JPI FS-450M-3 be ordered as a display only without cables and sensors?

Per JPI - The Indicator and harness can be ordered with or without transducer. Please contact Aircraft Spruce avionics sales for price quote and lead time.

Q: What does the JPI FS-450M-3 include?

This includes the unit, wiring and necessary transducers.

Q: Whats the K factor to install it in a Pa31-310? Does it need something special for it to be installed in that particular airplane?

The K factor is ~29

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