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1985 MOONEY M20K 231
Starts from the median asking price of 17 comparable Mooney M20K 231 listings ($149,000), then adjusts for:
- Year +5 vs comparable listings +7.5%
- Airframe time -585 hr vs comps +1.2%
- Engine time -202 hr vs comps +1.6%
- Modern GPS navigator (47% of comps) +2.5%
- ADS-B (71% of comps) +0.8%
- Market supply: 20 for sale of 770 FAA-registered +2.8%
Shown as a range. An estimate from asking-price comparables and FAA supply data — not an appraisal.
Overview
| Make / Model | Mooney M20K 231 |
|---|---|
| Type | Single-Engine Piston |
| Airframe time | 2,740 hrs |
| Engine time | 920 SNEW |
| Avionics / GPS | Garmin GNS 430 |
| Avionics / Autopilot | GARMIN GFC 500 |
| Avionics / GPS / nav | GNS430W |
| ADS-B | Yes |
| Annual | February 2026 |
| Airworthy | Yes |
Description
N231TT is a well-equipped Turbo Mooney M20K combining renowned Mooney efficiency and speed with a modern Garmin flight deck. Featuring a Garmin G3X display system, Garmin GFC500 digital autopilot, GNX375 WAAS GPS/ADS-B transponder, Garmin Engine Information System, and Garmin G5 standby instrumentation, this aircraft offers outstanding capability for personal and business travel. Powered by a Continental TSIO-360 with approximately 910 hours since new and a recently overhauled propeller, N231TT presents an attractive ownership opportunity with excellent performance, modern avionics, and a strong maintenance pedigree. Documents: - N231TT Prop Log Sep 2023 to Feb 2026.pdf: https://media.sandhills.com/doc.axd?id=11047962151&p=&ext=.pdf&dl=False&wt=False&checksum=UiaAxBSqD9RQFKy9IqrkCj4kSddZ2O5R%2fcLivPkkwV28rhouoTu4T58lprGIGMJq0aabIqBBeHE%3d - N231TT Engine Logbook Feb 2022 to Feb 2026.pdf: https://media.sandhills.com/doc.axd?id=11047962147&p=&ext=.pdf&dl=False&wt=False&checksum=UiaAxBSqD9R078zjkxwflAgpzwTT83XRa1Ib%2fDr3hGB6vGRBFADloojzsXFJTtXRns4CTFoM254%3d - N231TT Airframe Logbook Feb 2022 to Feb 2026.pdf: https://media.sandhills.com/doc.axd?id=11047962146&p=&ext=.pdf&dl=False&wt=False&checksum=UiaAxBSqD9QCFdyHxlqNw8yJrDIgY6k4VhqYj%2f2tMjLcxSgFT0RdqNuL3gM4mjEZeLlcu4aiWww%3d - 7 N231TT prop log #3.pdf: https://media.sandhills.com/doc.axd?id=11047962143&p=&ext=.pdf&dl=False&wt=False&checksum=UiaAxBSqD9RJNYr8YlOmpTg4f1xSb12tAmCb%2fiyhYh5yRLh3yVrv%2fUEdH%2fHC35JT9QVYn7ePU24%3d - 6 N231TT prop log #2.pdf: https://media.sandhills.com/doc.axd?id=11047962142&p=&ext=.pdf&dl=False&wt=False&checksum=UiaAxBSqD9S6efZ9ckYpLBOdWmAqnwEYD2TFw6d%2by1G1593AoL41yEPkFaVGHWqR9pZLF%2fy7RRU%3d - 5 N231TT prop log #1.pdf: https://media.sandhills.com/doc.axd?id=11047962141&p=&ext=.pdf&dl=False&wt=False&checksum=UiaAxBSqD9QZ3j9VXhn0b9ZTQajeGOT2ewQgHBCrgcNBRX%2fV%2fLmlyOHS%2bZ3zs8TZ0nflrTAhWvQ%3d - 4 N231TT engine log.pdf: https://media.sandhills.com/doc.axd?id=11047962140&p=&ext=.pdf&dl=False&wt=False&checksum=UiaAxBSqD9R%2bl8mtfOEWsVgCyiaB5%2fPPV286UAEfVPaZ8HveBQMHj8oZzooMAEmUqAlcrRap3PA%3d - 3 N231TT aircraft log # 3.pdf: https://media.sandhills.com/doc.axd?id=11047962139&p=&ext=.pdf&dl=False&wt=False&checksum=UiaAxBSqD9QHvU7D6dGAzmmkelNepAKbf9pNEcQNeYfrDvdQ0%2fIlJSj65AWMbe3jBsg8E4bIK08%3d - 2 N231TT aircraft log #2.pdf: https://media.sandhills.com/doc.axd?id=11047962137&p=&ext=.pdf&dl=False&wt=False&checksum=UiaAxBSqD9T4rHgOu8v271VOC6AFl1mDAiuRDRcFqRtwwKHwiWFUBIN2twZkmC6CRRcoU%2fQh%2bDY%3d - 1 N231TT aircraft log #1.pdf: https://media.sandhills.com/doc.axd?id=11047962132&p=&ext=.pdf&dl=False&wt=False&checksum=UiaAxBSqD9QoH1msxwSCaIJ4UgNQ6HuDfgZh1x300tn7ZKF2Lx6%2ff%2fPb%2bg0tX%2buaqPDjPDm0sag%3d
Modifications
Precise Flight Electric Speed Brakes Merlyn Products Waste Gate Turbo-Plus Intercooler Gami Injectors
Avionics
Garmin G3X 10” PFD Garmin G5 Standby AI Garmin Engine Analyzer System Garmin GFC500 Autopilot w/Trim Garmin GNS430W Navigator Garmin GNX375 GPS Transponder Garmin GTR225 VHF Comm Garmin GSB15 USB Charging Port Precise Flight 2000 Speed Brakes Whelen LED Wingtip Navi Lights Whelen Orion Tail Position Light LED Landing Lights
Recommended avionics upgrades
A GNS 430 upgrades naturally to the GTN 650Xi — same footprint, touchscreen GPS/nav/comm with LPV approaches.
See prices & suppliers ›Suggestions are based on the panel described in this listing; verify STC approval for this make/model before any installation.
Service Difficulty Reports (SDRs)
Checking FAA service difficulty reports…
Airworthiness Directives (ADs)
Checking airworthiness directives…
How this aircraft compares
Where this Mooney M20K 231 lands versus other Mooney M20K 231 listings on fyiAero.
Price
88th pct$175k · 88th percentile of 17 listings
Airframe time
31st pct2,740 hours total (TTAF) · 31st percentile of 16 listings
Engine time
38th pct920 hours since new · 38th percentile of 16 listings
Percentile = share of comparable listings at or below this value. Lower airframe/engine hours are generally fresher; price reflects the asking price only.
Documents
- 📄 N231TT Prop Log Sep 2023 to Feb 2026.pdf
- 📄 N231TT Engine Logbook Feb 2022 to Feb 2026.pdf
- 📄 N231TT Airframe Logbook Feb 2022 to Feb 2026.pdf
- 📄 7 N231TT prop log #3.pdf
- 📄 6 N231TT prop log #2.pdf
- 📄 5 N231TT prop log #1.pdf
- 📄 4 N231TT engine log.pdf
- 📄 3 N231TT aircraft log # 3.pdf
- 📄 2 N231TT aircraft log #2.pdf
- 📄 1 N231TT aircraft log #1.pdf
General
| Year | 1985 |
|---|---|
| Manufacturer | MOONEY |
| Model | M20K 231 |
| Serial Number | 25-0857 |
| Registration # | N231TT |
| Condition | Used |
Airframe
| Total Time | 2,740 |
|---|---|
| Basic Empty Weight | 2,002.13 lb |
| Useful Load | 897.87 lb |
| Complete Logs | Yes |
Engine
| Engine 1 Make/Model | CONTINENTAL |
|---|---|
| Engine 1 Time | 920 SNEW |
| Engine TBO | 1800 |
Props
| Prop Manufacturer | MCCAULEY |
|---|---|
| Prop Model | 2A34C221B |
| Prop Time | 432 SOH |
Avionics
| Auto Pilot | Yes |
|---|---|
| ADS-B Equipped | Yes |
| WAAS | Yes |
| LPV | Yes |
| SVT | Yes |
| Yaw Damper | Yes |
| Terrain Warning System | Yes |
| Engine Monitor | Yes |
| Avionics/Radios | Garmin G3X 10” PFD Garmin G5 Standby AI Garmin Engine Analyzer System Garmin GFC500 Autopilot w/Trim Garmin GNS430W Navigator Garmin GNX375 GPS Transponder Garmin GTR225 VHF Comm Garmin GSB15 USB Charging Port Precise Flight 2000 Speed Brakes Whelen LED Wingtip Navi Lights Whelen Orion Tail Position Light LED Landing Lights |
Additional Equipment
| Additional Equipment | Precise Flight Electric Speed Brakes Merlyn Products Waste Gate Turbo-Plus Intercooler Gami Injectors |
|---|
Interior
| Year Interior | 2024 |
|---|---|
| Number of Seats | 4 |
| Configuration | Passenger |
Exterior
| Year Painted | 2024 |
|---|
Inspection Status
| Inspection Status | February 2026 |
|---|---|
| Airworthy | Yes |
Service Logs
| Miscellaneous | N231TT Prop Log Sep 2023 to Feb 2026.pdf N231TT Engine Logbook Feb 2022 to Feb 2026.pdf N231TT Airframe Logbook Feb 2022 to Feb 2026.pdf 7 N231TT prop log #3.pdf 6 N231TT prop log #2.pdf 5 N231TT prop log #1.pdf 4 N231TT engine log.pdf 3 N231TT aircraft log # 3.pdf 2 N231TT aircraft log #2.pdf 1 N231TT aircraft log #1.pdf |
|---|
Operating costs & specifications — Mooney M20K 231
Typical model-level figures for the Mooney M20K 231 (not this specific airframe).
Performance & dimensions
| Range | 980 nm |
|---|---|
| Cruise speed | 191 kts · 220 mph |
| Takeoff / landing | 1220.0 / 1147.0 |
About this plane
Single engine piston aircraft with retractable landing gear. The M20K 231 seats up to 3 passengers plus 1 pilot.
Range from base
Still-air range ring — type an aircraft to change it. Compare aircraft on the Range tool ›
Last flight
Actual flight path from FlightAware for N231TT. More flight tracking ›
