1974 BEECHCRAFT SUNDOWNER | $129,900

YEAR: 1974    TAIL #: N6508R     TOTAL TIME: 2,174     ENGINE HRS: 201 SMOH  

This is not your average Sundowner. Beautifully maintained and upgraded, this 1974 Beechcraft C23 features just over 2,000 total time with ~201 SMOH and an outstanding avionics package totaling nearly $60K in recent upgrades. The aircraft is now equipped with a full Garmin glass panel, including a GNX 375 GPS/ADS-B transponder, GMA 345 Bluetooth audio panel, GNC 215 NAV/COM, GTR 205 COM, (3) GI 275s with EIS, and all-new digital fuel senders — bringing modern functionality to a reliable, time-tested airframe.

The exterior boasts a timeless five-color Imron paint scheme (9/10) with beige, burgundy, aqua, and gold striping. Inside, the aircraft features a luxurious tan leather/sheepskin interior, ultra-leather headliner, and polished wood accents — all rated 9/10 and installed during a complete interior refit in 2005. A new Sensenich prop, strong engine compressions, and freshly calibrated weight & balance make this a turnkey aircraft ready to fly.

You’ll be hard-pressed to find a Sundowner this clean, this low-time, and this modernized. It’s perfect for IFR training, private ownership, or flying with confidence in a reliable Beechcraft platform — now paired with cutting-edge avionics and comfort.

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CategorySpecification / Equipment
Aircraft Model1974 Beechcraft C23 Sundowner
Total Time~2,174 TT 
Engine Time (SMOH)~201 SMOH (Lycoming O‑360‑A4J, 180 hp, solid crankshaft)
Exterior5-color Imron paint scheme: Beige base with burgundy, aqua, and gold striping (2005 repaint – 9/10 condition)
InteriorTan leather seats with sheepskin trim, beige carpet, ultra leather headliner, wood accents, and new trim panels (2005 reupholstered – 9/10 condition)
Avionics (Fully Upgraded)• Garmin GNX 375 GPS/Transponder (ADS-B In & Out)
• Garmin GMA 345 Audio Panel with Bluetooth
• (3) Garmin GI 275s — includes EIS, ADAHRS, and backup attitude
• Garmin GNC 215 NAV/COM Radio
• Garmin GTR 205 COM Radio
• Garmin GSB 15 USB power module
• Garmin GA 35 GPS/WAAS antenna
• Garmin GAE 12 Digital Altitude Encoder
• Garmin GMU 11 Magnetometer
• Garmin GTP 59 OAT Probe
• GI 275 EIS with GEA 24 + Engine Sensor Kit
Legacy Equipment (Retained)• Century I Autopilot with GPS tracking
Safety & Maintenance• No corrosion or hail damage
• Always hangared since 1977
• Fresh weight & balance completed post-install
• Physically reweighed and balanced with all avionics installed
Engine DetailsMajor Overhaul @ 1973 TT (2013)
• New Millennium cylinders
• SkyTec lightweight starter
• Overhauled magnetos, yellow-tagged crankcase/steel parts
• Excellent compressions: 78/76/78/78
Propeller81.6 hours since new Sensenich fixed-pitch prop installed (2016)
Recent Additions ($38,000+ Investment)• Complete Garmin glass panel install
• Fuel system upgrade with CIES digital senders
• Panel reconfiguration, new CB bus bars, and wiring harnesses
• Vacuum system removed, electrical-only ops
• FAA paperwork, STC compliance, and calibration completed
Highlights• IFR-ready with all-new digital glass avionics
• One of the cleanest, lowest-time Sundowners in the U.S.
• Ideal for modern flight training or affordable personal IFR travel
• Timeless paint & interior + rock-solid Beech quality