1973 Bertram 31 Flybridge Cruiser
$117,900
Boat in Portsmouth, NH 03801 US
Built in 1973
31 Flybridge Cruiser
2 Engines (2x Yanmar)
31 feet
Diesel
Fiberglass/Reinforced
Location: Portsmouth, NH
Type: Flybridge Sportfish
Hull Material: Solid Fiberglass
Fuel Type: Diesel
Engines: Twin Yanmar 6LPA-STP 315hp
Engine Hours: ~1,500
Repowered in 2004 with twin 315hp Yanmar 6LPA-STP diesels, Happy Mama is a clean and mechanically updated example of the legendary Bertram 31.
This is a fantastic cruising platform or serious offshore fishing vessel. Designed by C. Raymond Hunt, the Bertram 31's solid fiberglass deep-V hull and contemporary lines were far ahead of their time and remain highly respected today.
Major engine interval service was completed in 2023, making her turnkey and ready for her next owner.
She retains her original interior and gelcoat, preserving the classic Bertram character, while numerous upgrades ensure reliable performance.
PERFORMANCECruise: 24-26 knots @ 3,000-3,200 RPM
Approx. 18 GPH at cruise
Top Speed: ~30 knots WOT
Legendary rough-water capability and dry ride
Brand new 1½" propeller shafts
New cutlass bearings
Line cutters installed on shafts
Major Yanmar interval service:
Aftercoolers removed, cleaned, painted & reinstalled
Heat exchangers serviced
Oil, fuel & transmission coolers serviced
All new hoses and clamps
New PSS dripless shaft seals
(4) reinforced swivel rod holders
Livewell pump added
Fusion stereo system (2022)
Reconditioned props (2021)
New rudder bearings (2021)
EZ2CY bridge enclosure (2020)
Garmin 18xHD Radar (2018)
Garmin 7610sv MFD (2017)
New batteries (2018)
Custom SEAmless hardtop (2017)
Forward V-berth
Convertible dinette
Galley with sink and refrigeration
Enclosed head
Classic Bertram teak trim
Few production hulls have earned the reputation of the Bertram 31. Offshore proven, heavily built, and timeless in profile, it remains one of the most sought-after classic sportfishing platforms ever produced.
Happy Mama is a well-maintained example offering updated diesel power, strong service history, and the ride that made the 31 famous.
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 |
|---|---|---|
| 2/20/26 | Initial price | $117,900 |
Overview from around the web 1973 Bertram 31 Flybridge Cruiser
Customers praise the 1973 Bertram 31 Flybridge Cruiser for its classic design and solid construction
Many highlight its spacious flybridge, offering excellent visibility and a comfortable area for navigation and socializing. Owners appreciate the boat's sturdy fiberglass hull, which provides a smooth and stable ride even in choppy waters. The interior is often described as well-laid-out and cozy, with ample storage and functional amenities for extended cruising. Enthusiasts also value its powerful engine options that deliver reliable performance. Overall, the Bertram 31 Flybridge Cruiser from 1973 is celebrated for blending timeless style with dependable functionality, making it a favored choice among classic yacht lovers.
The Biggest Pros and Cons
The 1973 Bertram 31 Flybridge Cruiser is a classic vessel known for its sturdy construction and timeless design. Here are some pros and cons to consider:
Pros
Solid Build Quality: Bertram yachts from this era are renowned for their robust fiberglass hulls and durable construction, offering excellent seaworthiness.
Classic Styling: The 31 Flybridge Cruiser features a distinctive vintage look, combining functional design with classic nautical aesthetics.
Spacious Flybridge: The elevated flybridge provides great visibility and an enjoyable outdoor helm experience, ideal for cruising and entertaining.
Comfortable Interior: Despite its size, the boat offers a well-laid-out cabin with sleeping accommodations, a galley, and a head, making it suitable for overnight trips.
Strong Performance: Powered by reliable engines, the Bertram 31 can deliver solid cruising speeds and handles well in various sea conditions.
Cons
Older Systems: Being a vessel from 1973, many of the onboard systems, including electrical, plumbing, and mechanical components, may require updating or maintenance.
Fuel Efficiency: Compared to modern boats, the Bertram 31's fuel consumption can be relatively high, impacting operating costs.
Limited Modern Amenities: The classic design means fewer contemporary conveniences and electronics, which might necessitate upgrades for some owners.
Maintenance Needs: Older fiberglass and wood trim may require attentive upkeep to prevent deterioration.
Space Constraints: While well-designed, the interior space is limited compared to larger or newer cruisers, which may affect comfort on extended voyages.
Made For
The 1973 Bertram 31 Flybridge Cruiser is ideal for boating enthusiasts who appreciate classic design, solid construction, and versatile performance. It suits those looking for a reliable offshore cruiser that offers comfortable accommodations, a spacious flybridge for entertaining, and the capability to handle both leisurely day trips and extended coastal voyages. Whether you're an experienced sailor or a passionate weekend adventurer, this boat provides a perfect blend of style, durability, and functionality.
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Address
Boat Location
Contact Bay Marine - Ohio about 1973 Bertram 31 Flybridge Cruiser
1535 1st Street, Sandusky, OH, 44870
Contact Bay Marine - Ohio
1535 1st Street, Sandusky, OH, 44870
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