21' 1998 Duffy 21 Classic

2021–2022 Major Electrical & Equipment Upgrades

This Duffy Classic 21 electric boat received significant electrical and mechanical updates, improving reliability, efficiency, and onboard comfort.

• Lester Summit II Bluetooth Battery Charger
• (16) US125 6-Volt Batteries – 48V battery bank
• (34) New Battery Cables
• Alltrax Motor Controller (Brain Box)
• Alltrax Electronic Throttle Actuator
• Self-Aligning Thrust Power Block Pillow (new – still in box)
• Bearing Stuffing Box (new – still in box)
• 3-Blade Propeller
• Strut Bolts and Prop Hardware
• Antifouling Bottom Paint

Comfort & Cockpit Features

Designed for comfortable harbor cruising and entertaining.

• Seamark Royal Blue Tweed Surrey Top
• Helm Back Cushion
• Forward Cockpit Table
• Bottle Holder & Bar Area Indirect Lighting
• Bluetooth Dual Stereo System
• (4) Speakers with wiring
• Mirror
• Helm Cover
• Seating for up to 9 passengers

Lighting & Navigation

• LED Side Clearance Lighting
• Navigation Lights
• Ensign Flag
• Twin Rudders
• Wheel Steering

Safety Equipment

• (6) Life Vests
• (2) West Marine Life Jackets
• Horn
• Fire Extinguisher
• Anchor & Chain

2025 Maintenance

• Rule Automatic & Manual Bilge Pumps Installed
• Last Haulout: July 2025

Performance

• Cruising Speed: ~5 knots
• Top Speed: ~7 knots
• E-Meter Gauge to monitor battery charge while underway

Trailer

• 2001 Pacific Tandem Axle Trailer

Additional Features

• Spare Propeller
• Extra Storage in Place of Refrigerator

The 1998 Duffy Classic 21 “Butterfly” is a rare opportunity to own one of the most recognizable electric harbor cruisers on the market. Designed for quiet, environmentally friendly boating, the Duffy Classic series is known for its smooth ride, simple operation, and comfortable social layout—making it ideal for harbor cruising, waterfront entertaining, and sunset outings.

“Butterfly” has benefited from significant electrical and mechanical upgrades completed in 2021–2022, including a Lester Summit II Bluetooth charger, a 48-volt battery bank with sixteen US125 batteries, new battery cabling, and an Alltrax motor controller system. These improvements enhance reliability and performance while maintaining the quiet, low-maintenance advantages that make electric boats so appealing for protected waters and marina cruising.

The spacious cockpit comfortably accommodates up to nine guests, with a Surrey top for shade, cockpit table, stereo system, and indirect bar lighting creating an inviting atmosphere for entertaining. Twin rudders and wheel steering provide easy maneuverability around marinas and waterfront restaurants.

“Butterfly” has been boathouse-kept for most of its life in the New Orleans Municipal Yacht Harbor, helping preserve the vessel’s overall condition. The boat also includes a 2001 Pacific tandem-axle trailer, allowing for convenient transport or storage.

With quiet cruising speeds around 5 knots and a top speed of approximately 7 knots, the Duffy Classic 21 remains one of the best platforms for relaxed electric boating.

Showings are available by appointment.

The Classic 21 brochure and specification sheets attached under the General Arrangement Section are only for reference as the features and options might differ from "Butterfly."

The company offers the details of this vessel in good faith but cannot guarantee or warrant the accuracy of this information nor warrant the condition of the vessel. A buyer should instruct his agents, or his surveyors, to investigate such details as the buyer desires validated. This vessel is offered subject to prior sale, price change or withdrawal without notice.

Listing MLS by Yachtr.com