Seahorse 24 Sailboat Review, Specs, and Listings

Design Brief & Intent 2

The Seahorse 24 was engineered specifically to appeal to the emerging 1970s trailer-sailer market. Unlike the heavy-displacement, wood-trimmed vessels of the mid-1960s, it embraced a lighter, beamier profile and a versatile centerboard configuration that allowed for both competitive coastal racing and shallow-water exploration.

Inside, the Seahorse 24 is traditional but highly functional. The cabin layout is a mirror image of the earlier Dolphin 24, but with a crucial modern addition: a pop-top deck design. When raised at anchor, this pop-top provides six feet, two inches of headroom, transforming what would otherwise be a cramped 24-foot interior into a light, airy, and genuinely livable space. The interior joinery features rich mahogany trim and a warm, inviting feel that was a hallmark of Yankee Yachts' build quality, contrasting sharply with the stark, all-plastic liners of cheaper contemporary trailer-sailers. The cabin accommodates up to four adults with a forward V-berth, a convertible dinette, a compact galley, and space for a marine head.

Stub Keel & Centerboard Configuration

The defining characteristic of the Seahorse 24 is its stub keel and centerboard setup. While some online databases mistakenly list a 4,000-pound displacement, original factory literature and class histories confirm a nimble 2,900-pound displacement. Below the waterline, Finch placed 600 pounds of internal lead ballast within a shallow molded fiberglass stub keel, drawing just one foot, eight inches with the centerboard retracted. Inside this stub keel sits a 250-pound fiberglass-encapsulated lead centerboard.

When fully lowered, the board extends the draft to four feet, eight inches, providing excellent lift and windward performance. This design offers a significant advantage over pure swing-keel trailer-sailers of the era, such as the Catalina 22 or Aquarius 23. By keeping the main ballast weight in the external stub keel, Yankee Yachts eliminated the need for a massive, space-stealing internal centerboard trunk that typically divides the main salon of smaller boats. Furthermore, the pivot pin does not bear the entire weight of the ballast, minimizing catastrophic structural risks.

Sailing Performance & Handling

With a sail area-to-displacement ratio of 19.67, the Seahorse 24 is a lively performer that excels in light-to-moderate air. It accelerates quickly and is highly responsive at the helm, true to its design heritage as a Quarter Ton racer. The displacement-to-length ratio of 161.83 classifies it firmly as a light-displacement vessel. Its relatively long waterline of twenty feet relative to its overall length of twenty-three feet, nine inches gives it a modern, efficient hull form that easily achieves its theoretical hull speed of six knots.

However, its comfort ratio of 13.52 alerts the skipper to a quick and highly active motion in a seaway. The ride in a chop is lively, and the boat will feel tender initially under a gusty breeze, though the hull quickly stiffens as the stub keel and the lowered centerboard bite. Under the Capsize Screening Formula, the boat registers a 2.22. This relatively high value reflects its wide beam of seven feet, ten inches compared to its light displacement. While this provides excellent primary stability and plenty of initial form stability for family daysailing, it indicates that the Seahorse 24 lacks the deep-water self-righting margins required for offshore passages. It is beautifully suited for protected bays, lakes, and coastal estuaries, but should not be taken into open ocean conditions where extreme breaking seas can occur.

Known Issues & Triage

Maintaining a vintage Seahorse 24 requires attention to several age-related areas, particularly the centerboard mechanism and structural attachments.

The 250-pound ballasted centerboard is raised and lowered via a pendant line. If neglected, this cable can snap, causing the board to jam or sink to the bottom. Additionally, stress fractures can develop near the bearing pivot point where the centerboard meets the trunk. Triage requires inspecting the pivot pin and replacing worn rope or older wire pendants.

Because the boat relies on outboard power, the transom is subjected to the significant lever-action force of a six- to eight-horsepower motor. Over time, the fiberglass transom can flex and crack. Owners routinely install a 3/4-inch marine plywood or G10 backing plate inside the lazarette to distribute the load across a wider surface area.

Like many yachts of its generation, the deck is balsa-cored. Decades of neglected sealant on stanchions, chainplates, and the pop-top track can allow moisture to penetrate the core, leading to delamination and soft spots. Tap-testing the deck with a plastic hammer is essential to locate any rot prior to purchase. Furthermore, the pop-top mechanism relies on rubber seals and a fabric enclosure to remain weatherproof. Decades of UV exposure mean most original enclosures are rotted or missing, requiring custom canvas work to restore full cruising functionality.

Modernization & Upgrades

Veteran owners looking to modernize the Seahorse 24 find it an excellent platform for contemporary upgrades. Replacing the old wire pendant with a modern synthetic line, such as Dyneema, is a highly popular upgrade. Dyneema matches the strength of steel while eliminating corrosion, kinking, and the rasping noise of a wire cable inside the boat.

Thanks to its light displacement of 2,900 pounds, the Seahorse 24 is also an ideal candidate for electric outboard conversions. Lightweight electric motors easily push the hull to hull speed in calm conditions. When paired with a small lithium iron phosphate (LiFePO4) battery bank housed in the lazarette, owners can enjoy silent, maintenance-free motoring without the weight, smell, and reliability headaches of vintage small outboards. Restoring the pop-top tent with modern marine-grade acrylic fabrics dramatically improves liveability and weather protection while at anchor.