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1968 Mooney M20F Exec 21Single-Engine Piston Aircraft • Riverside, CA, USA

The 1968 Mooney M20F Exec 21, registered as N3840N, is offered for purchase at a price of $125,000 and is positioned as a capable cross-country machine with a strong focus on recent upgrades. The airframe has accumulated 3,733 total hours, and the engine, an IO-360-A1A with serial number RL-1090-51A, has 547 hours since major overhaul, with the propeller having 876 hours since overhaul. The aircraft has no damage history, a claim supported by consistent logs maintained on the Adlog system since 1986, and the most recent annual inspection was completed in December 2025.

Avionics upgrades are a highlight of this listing, featuring a Garmin G5...

Year
1968
Make
Mooney
Series
M20
Model
M20F EXEC 21
Tail #
3840N
Serial #
680127

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Specifications

Category
Single-Engine Piston
Intended Use
Business, Recreational
Flight Rules
IFR
Useful Load
998 lbs
Seats
4

Hours, Logs & Inspections

Total Time
3,733 hrs
Engine 1 Time
547 hrs (SMOH)
Prop 1 Time
876 hrs (SPOH)
Logbook Status
Logs are complete and consistent using the Adlog system since 1986. AD compliance records available.
Inspection Status
Annual completed 12/2025. Pitot Static and transponder certification 12/2025.

Avionics

PFD

Garmin G5 HSI

Audio

Garmin GMA 345 - Audio Panel

GPS

Garmin GTN 750

Comms

KX 155

ADSB

Garmin GTX 345 - Transponder with ADS-B

EMS

JPI 900 - Engine Monitor

AP

Brittain Wing Leveler - Autopilot

Additional Equipment

ELT

406 ELT with remote switch, battery expiration 5/2029

Overhaul Kits / Modifications

O&N Fuel Bladder STC

Exhaust System

Complete exhaust system sent to AWI in 2019 for repair but mostly replaced

Air Filter

Challenger Air Filter

Interior & Exterior

Interior Rating
7/10
Interior Year
1999
Paint Rating
7/10
Paint Year
1984
Interior Notes
Interior is probably 6 or 7 out of 10, no tears, plastic and headliner in good shape.
Exterior Notes
Paint is probably 6 or 7 out of 10, hangared at KRAL.

Engine & Propeller

Engine Type
Piston
Engine Count
1
Engine Model
IO-360-A1A
Propeller Model
Hartzell 3-blade

Asking Price

$125,000

Aircraft Location

Riverside, CA, USA

Listing Details

Used
For Sale

Price History

May 16, 2026: $125,000(-$4,000) - trade-a-plane

Mar 19, 2026: $129,000 - trade-a-plane

Contact Seller

First Seen: Mar 19, 2026

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Asking Price

$125,000