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1984 MOONEY M20K 231
Starts from the median asking price of 17 comparable Mooney M20K 231 listings ($149,000), then adjusts for:
- Year +4 vs comparable listings +6.0%
- Airframe time -360 hr vs comps +0.7%
- Engine time -1,052 hr vs comps +8.4%
- Modern GPS navigator (47% of comps) +2.5%
- No ADS-B (71% of comps have one) -1.8%
- 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 | 2,965 hrs |
| Engine time | 70 SMOH |
| Prop blades | 3 |
| Avionics / GPS | Garmin GNS 430 |
| Avionics / Transponder | King KFC 150 |
| Avionics / Audio panel | SIGTRONICS SPA-400 |
| Avionics / ADF | KR 87 |
| Annual | May 2027 |
| Inspection | Annual |
| Airworthy | Yes |
Description
Price Reduced - Bring Offers!! 1984 Mooney M20K 231 with just 70 SMOH on the engine & Prop! Loaded with the upgrades Mooney buyers look for. Equipped with a 3-blade McCauley prop, speed brakes, Turboplus intercooler, Merlyn Products Wastegate Controller, prop de-ice, built-in oxygen, JPI engine monitor, and extensive upgrades throughout! Fast, efficient, and capable. This well-equipped 231 offers great cross-country performance, strong ramp appeal, and true turnkey!
Modifications
•Speed Brakes by Precise Flight •Three Blade Propeller •Turboplus, Inc. Intercooler System •Turbocharger Differential Pressure Control System •Merlyn Products Wastegate Controller •Hot Prop Deice System •4 Place Oxygen System •Digital Fuel Flow/Totalizer by SDI/Hoskins •EDM-700 Engine Analyzer •Standby Vacuum System •SigtronicsSPA-400 Intercom •Strobe Lights •Polished Spinner •Dual Localizer / Glideslope
Avionics
•Garmin GNS 430 WAAS-GPS/COM/NAV -King HSI •King KX165 NAV/Com –Localizer / Glideslope •King KFC150 Autopilot/Flight Director/Alt Preselect •BF Goodrich WX-900 Stormscope •Garmin GTX-345 Transponder •Sperry Color Radar •King KR 87 ADF •King DME with Nav Selector
Recommended avionics upgrades
A GNS 430 upgrades naturally to the GTN 650Xi — same footprint, touchscreen GPS/nav/comm with LPV approaches.
See prices & suppliers ›No ADS-B is listed — a GTX 345 delivers required ADS-B Out plus In (traffic & weather) in one transponder.
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
71st pct$149k · 71st percentile of 17 listings
Airframe time
44th pct2,965 hours total (TTAF) · 44th percentile of 16 listings
Engine time
6th pct70 hours since major overhaul · 6th 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.
General
| Year | 1984 |
|---|---|
| Manufacturer | MOONEY |
| Model | M20K 231 |
| Serial Number | 25-0836 |
| Registration # | N5766M |
| Condition | Used |
Airframe
| Total Time | 2,965 |
|---|---|
| Complete Logs | Yes |
Engine
| Engine 1 Make/Model | CONTINENTAL |
|---|---|
| Engine 1 Time | 70 SMOH |
| Engine TBO | 2000 |
Props
| Prop Manufacturer | MCCAULEY |
|---|---|
| Prop Model | D3A32C409-C |
| Prop Time | 70 SNEW |
| Number of Blades | 3 |
Avionics
| Avionics/Radios | •Garmin GNS 430 WAAS-GPS/COM/NAV -King HSI •King KX165 NAV/Com –Localizer / Glideslope •King KFC150 Autopilot/Flight Director/Alt Preselect •BF Goodrich WX-900 Stormscope •Garmin GTX-345 Transponder •Sperry Color Radar •King KR 87 ADF •King DME with Nav Selector |
|---|
Additional Equipment
| Oxygen System | Yes |
|---|---|
| Additional Equipment | •Speed Brakes by Precise Flight •Three Blade Propeller •Turboplus, Inc. Intercooler System •Turbocharger Differential Pressure Control System •Merlyn Products Wastegate Controller •Hot Prop Deice System •4 Place Oxygen System •Digital Fuel Flow/Totalizer by SDI/Hoskins •EDM-700 Engine Analyzer •Standby Vacuum System •SigtronicsSPA-400 Intercom •Strobe Lights •Polished Spinner •Dual Localizer / Glideslope |
Interior
| Year Interior | 2025 |
|---|
Inspection Status
| Inspection Status | •Annual Due: May 2027 •IFR Check Due: May 2028 |
|---|---|
| Airworthy | Yes |
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 N5766M. More flight tracking ›
