Launched in 1977, the Endeavour 37 went on to enjoy an impressive production run of 476 hulls before winding down in 1983 2. Designed with the shallow waters of the Florida Keys and the Bahamas in mind, the boat represents a highly specific design philosophy. It prioritized volume, structural heft, and a shallow draft over raw speed or racing pedigree, establishing itself as a beloved, blue-collar cruiser that remains a common sight in coastal and tropical cruising grounds today.
Design Brief & Intent
The Endeavour 37 was conceived as an accessible coastal cruiser and liveaboard platform capable of navigating the thin waters of the American Southeast and the Caribbean. While contemporary databases occasionally classify the underwater profile as a fin keel, its physical construction is far closer to a heavily cutaway long keel with a thick wineglass cross-section. A deep notch in the keel profile immediately forward of the rudder protects both the propeller and the skeg-mounted rudder, offering excellent defense against accidental groundings.
In terms of market positioning, the Endeavour 37 competed directly with the heavy-displacement cruisers of its era, such as the Morgan Out Island series and the early Gulfstar cruising designs. It stood out by offering a highly robust, hand-laid solid fiberglass hull paired with an uncommonly spacious interior. Inside, the boat features extensive teak joinery and trim over marine plywood bulkheads. The level of fit-out is solid and traditional, yielding an interior that feels remarkably substantial and secure. It was designed to feel like a traditional home on the water, a quality that continues to appeal to budget-conscious liveaboards and cruising couples.
Variations & Configurations
Throughout its six-year production cycle, Endeavour offered the 37 with multiple rig and interior configurations, allowing buyers to customize the boat's cruising capabilities. The hull was rigged as a masthead sloop, ketch, cutter, or yawl. The standard masthead sloop and ketch versions featured a low-aspect-ratio sail plan with no bowsprit. However, recognizing that the standard rig was significantly undercanvased in light air, the builder introduced a tall rig option—featuring a mast roughly three feet taller—along with an optional three-foot bowsprit. On cutter and select sloop configurations, the bowsprit moved the forestay forward to enlarge the foretriangle, which drastically improved performance and helped balance the boat.
Below deck, the builder offered three distinct interior layouts, designated as Plans A, B, and C:
- Plan A: This highly unconventional layout features a massive U-shaped dinette located all the way forward in the bow, converting into a large double berth. The head is positioned amidships to port, directly opposite a long starboard-side galley. Aft, the layout is completed by two double quarter berths. Plan A is celebrated for its open, airy feel and excellent ventilation, as the forward deck hatch allows a breeze to sweep unobstructed through the entire salon.
- Plan B: This is the more conventional cruising layout, replacing the forward dinette with a private V-berth. The head is located just abaft the V-berth, leading into a traditional saloon with opposing settees, a pilot berth, and an aft galley. A private, enclosed quarter cabin sits to port. While Plan B offers vastly superior privacy for guests, the main bulkhead obstructs cabin airflow, making it noticeably warmer in tropical climates.
- Plan C: A highly rare variation of Plan A (with only about six units constructed), Plan C removed the dedicated navigation station to completely enclose and privatize the starboard aft cabin.
Sailing Performance & Handling
The sailing characteristics of the Endeavour 37 are defined by its heavy displacement and modest sail area. With a displacement of 20,000 pounds and a standard sail-area-to-displacement ratio of 12.46, the boat is heavily undercanvased. In light winds under 10 knots, the standard sloop or ketch rigs require significant patience, as the hull is slow to accelerate. However, with a displacement-to-length ratio of 330.69, the boat possesses immense physical momentum. Once moving, it carries its speed through lulls and chops with remarkable ease.
With a ballast-to-displacement ratio of 40% (utilizing 8,000 pounds of internal lead ballast) and a motion comfort ratio of 36.89, the Endeavour 37 delivers an incredibly sea-kindly, reassuringly gentle ride in heavy weather. It dampens rapid pitching and rolling, reducing crew fatigue during long coastal passages. Furthermore, its capsize screening ratio of 1.71 is well below the conservative threshold of 2.0, affirming its inherent physical stability and seaworthiness.
Under sail, the primary handling challenge is a pronounced tendency toward weather helm, particularly on standard-rigged sloops when carrying a full mainsail in rising winds. This is best managed by reefing the mainsail early and relying on the headsail for power. Owners of the tall-rigged cutter and bowsprit-equipped sloop variants report a much more balanced helm, as the forward-shifted forestay mitigates the rounding-up tendency. Due to its 4.5-foot shoal draft and long, cutaway keel, the Endeavour 37 does not point closely to the wind. Tacking angles are generally wide, typically between 100 and 110 degrees, meaning that windward progress is a matter of steady, patient cruising rather than tactical precision.
Market Snapshot & Economics
On the brokerage market, the Endeavour 37 represents a highly accessible entry point for pocket-book cruisers, offering substantial structural value. It commands a stable but modest position, trading as a value-oriented alternative to more expensive offshore designs of the same era. Because of its production origins in Florida, the model is highly abundant along the US East Coast, the Gulf of Mexico, and the Great Lakes.
While the purchase price of an Endeavour 37 is often enticingly low, prospective buyers must carefully weigh the economics of a refit. Many examples on the market retain their original mechanical systems, meaning that the cost of modernizing the boat—such as replacing tanks, rewiring the DC panel, or upgrading standing rigging—can easily meet or exceed the initial purchase cost of the vessel. However, for a buyer willing to invest sweat equity into a structurally solid platform, the Endeavour 37 offers a highly rewarding return on investment, as it provides the interior living space of many 40-footers without the associated dockage fees.
Known Issues & Triage
While the solid fiberglass hull is incredibly robust, the Endeavour 37 has several well-documented technical vulnerabilities that require careful inspection before purchase.
- Plywood Deck Coring: Unlike builders who utilized end-grain balsa or synthetic foam, Endeavour cored its decks and cabin house using individual, four-to-six-inch square blocks of plywood. If deck hardware, stanchion bases, or handrails are left un-bedded, water migrates into the core. This rots the isolated plywood blocks, leading to soft spots. Because of the segmented block design, repairing these areas requires surgically cutting open the fiberglass skin and replacing the individual rotted plywood blocks, which is highly labor-intensive.
- Keel-Enclosed Aluminum Tanks: The original 55-gallon aluminum fuel tank and the freshwater tanks are located deep in the bilge, nestled within the keel cavity. Over decades, bilge water trapped around these tanks—often exacerbated by saturated surrounding foam—leads to external pitting corrosion and inevitable pinhole leaks. Extracting these tanks is a notorious task; it typically requires removing the cabin sole or dismantling substantial portions of the galley and salon cabinetry.
- Hull-to-Deck Joint & Toe Rail Leaks: The hull-to-deck joint is an overlapping flange bonded with adhesive and mechanically fastened with screws, capped with a teak toe rail. Over time, the sealant degrades, leading to chronic freshwater leaks along the sheerline. Furthermore, the outboard chainplates penetrate the deck right at this joint, creating a prime pathway for water intrusion that can rot internal bulkheads if left unchecked.
- Inadequate Bulkhead Tabbing: In some earlier hulls, the plywood bulkheads were tabbed directly to the single-skin hull laminate without the use of a foam fillet or cushion. This can create localized hard spots in the hull. For serious offshore work, some owners have had to grind away the original tabbing, introduce a proper radiused fillet, and re-tab the bulkheads to prevent flexing.
Modernization & Upgrades
Modern owners of the Endeavour 37 have developed standard upgrade paths to resolve the boat’s historical limitations and adapt it to contemporary cruising.
- Drivetrain & Propulsion: The original 50-horsepower Perkins 4-108 diesel is a legendary, highly rebuildable workhorse, though it is prone to minor oil leaks. While many owners elect to perform a top-end rebuild and upgrade the raw-water plumbing, others choose to repower with modern, lighter engines like a Beta Marine 43 or a Yanmar diesel. To reduce the massive drag of the heavily cutaway keel under sail, installing a three-blade feathering or folding propeller is highly recommended, which noticeably improves light-air performance.
- Electrical Overhaul & LiFePO4 Conversion: Given the generous interior volume, owners frequently convert the house electrical systems to lithium iron phosphate (LiFePO4) battery banks. To charge these banks, standard upgrades include the installation of high-output alternators (such as Balmar systems) paired with external multi-stage regulators, alongside solar arrays integrated into custom stern davits.
- Plumbing Simplification: To bypass the complex and hard-to-access legacy plumbing and marine holding tank configurations, many owners remove the original marine head and holding tank altogether. Installing a modern composting toilet simplifies the system, eliminates multiple through-hull fittings, and frees up valuable bilge and storage space.
- Rig Upgrades: Standard sloop owners looking to improve handling and reduce weather helm often add a bowsprit to shift the headstay forward, or convert the boat into a true cutter rig. Leading all halyards and reefing lines aft to the cockpit is another highly popular modification that makes single-handed or couples cruising significantly safer in rough weather.
The Verdict
The Endeavour 37 is a ruggedly built, traditionally styled cruising yacht that represents one of the most cost-effective routes to comfortable coastal cruising and tropical liveaboard life. It is not a boat designed to win club races or claw its way efficiently upwind in a blow, but its massive interior volume, heavy-displacement motion, and secure shoal draft make it an exceptional platform for exploring island chains. For buyers who prioritize structural longevity, sea-kindly handling, and liveaboard comfort over sailing speed, this classic Florida cruiser remains an enduring and highly practical option.
Pros 4
- Exceptional interior volume and head room, making it an ideal liveaboard platform
- Shoal draft of 4.5 feet is perfect for navigating the Florida Keys, the Bahamas, and shallow coastal waterways
- Very comfortable, sea-kindly motion in heavy seas, which minimizes crew fatigue
- Heavy, solid fiberglass hull construction that is built to withstand accidental groundings
- Large, active owner association providing a wealth of technical documentation, parts sourcing, and community support
Cons 6
- Poor light-air sailing performance and limited upwind pointing ability
- Pronounced weather helm under full mainsail on standard rigs without a bowsprit
- Highly labor-intensive deck core repairs due to the use of individual plywood blocks rather than balsa or foam
- Difficult access to the fuel and water tanks, which frequently require major carpentry destruction to replace
- Aging original systems (wiring, plumbing, and portlights) that typically require a comprehensive overhaul
