1975 Bertram 28 Flybridge Boat in Boynton Beach, FL 33435 US
Built in 1975
28 Flybridge
2 Engines (2x Yanmar)
28 feet
Diesel
Fiberglass/Reinforced
1975 Bertram 28 Flybridge
Fully Restored | Rebuilt Yanmar Diesels
Offered at $59,999
Located in Freeport, Grand Bahama
This iconic Bertram 28 Flybridge underwent an extensive top-to-bottom restoration completed in 2025. Rebuilt twin Yanmar turbo diesels, renewed interior, upgraded electrical systems, modern Garmin electronics, and impressive onboard amenities.
All the charm of a classic Bertram. None of the headaches of a major restoration project.
Renowned for its rugged construction, legendary deep-V hull, and exceptional offshore capabilities. Enjoy impressive diesel efficiency, cruising comfortably at 19-21 mph while burning approximately 12 GPH combined.
Only 55 hours of use since refurbishment. Extensive maintenance records, restoration invoices, and detailed logbooks available. September 2025 survey on hand.
Features & Upgrades
Power & Mechanical
Twin Yanmar 4LHA-STP turbo diesel engines - completely rebuilt, approximately 3,200 total hours
Only 55 hours of operation since 2025 refurbishment
Repowered from MerCruiser gasoline engines to Yanmar diesels in 2007
Both OEM turbochargers replaced in 2023
Recently completed full engine service
Kohler 4.5kW diesel generator - fewer than 30 hours
165-gallon fuel tank replaced during 2007 repower
Fresh bottom paint and PropSpeed
Brand-new electric windlass with 300' of rode, 40' of stainless steel chain, and 22 lb plough anchor
Performance & Fuel Economy
Economical cruise: 19-21 mph at 2,400 RPM
Fuel consumption at cruise: approximately 12 GPH combined
Higher-speed operation: 30-33 mph at 3,100 RPM
Fuel consumption at 3,100 RPM: approximately 20 GPH combined
Performance figures reported with approximately 80% fuel and typical cruising load
Restoration & Improvements
Extensive top-to-bottom restoration completed in 2025
New exterior and interior paint
Completely renewed interior with new headliners
Entire AC and DC electrical systems rewired
New centralized electrical distribution panel
New 20-gallon freshwater tank
Freshwater plumbing installed at galley sink and lavatory
Brand-new Bimini top and premium Isinglass enclosure - $4,500 investment
New helm cushions
Custom salon table with embossed backgammon playing surface
Portable solar generator connection for powering essential onboard systems without running the generator (portable generator and solar panels not included)
Comprehensive restoration invoices, service records, and detailed vessel logbooks available
Electronics & Navigation
Twin Garmin 12" multifunction displays
Garmin 6' open-array radar - ideal for offshore navigation and locating birds while fishing
Replaced, fully functioning Autohelm autopilot
Starlink Mini satellite internet with Wi-Fi capability
Interior Comfort & Amenities
Brand-new 16,000 BTU marine air conditioning
Brand-new marine head
Brand-new refrigerator
Ice machine
Flat-screen TV
Convection cooktop
Nespresso coffee machine
New freshwater system serving galley and lavatory
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.
Price History
| Date | Event | Price |
|---|---|---|
| 10/23/26 | Initial price | $59,999 |
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 1975 Bertram 28 Flybridge | ||||||
|---|---|---|---|---|---|---|
| Price | $59,999 | $39,999 | $94,900 | $99,999 | $110,000 | Price on request |
| Location | Boynton Beach | Pompano Beach | Stuart | Fort Pierce | Jacksonville | Naples |
| Nominal Length | 28' | 25' | 38' | 44' | 29' | 35' |
| Engine Make | Yanmar | MERCURY | Cummins | Detroit Diesel | Crusader | - |
| Total Engine Power | 240 hp | 300 hp | 450 hp | 550 hp | 343 hp | - |
| Days on Market | 15 | 552 | 228 | 855 | 1278 | 3 |
| Get in touch |
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Address
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Boat Location
Contact Adonai Yachts International about 1975 Bertram 28 Flybridge
19701 SW 197th Ave, Miami, FL, 33187
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