Design Brief & Intent
The San Juan 29 was designed as an all-around performer optimized for the light-to-moderate wind conditions of the Pacific Northwest and the North American coastal circuits. Unlike contemporary competitors of its era, such as the more conservative Catalina 27 or the heavier Pearson 28, the San Juan 29 maintained a strong racing pedigree. It was built for sailors who wanted to participate in local PHRF fleet racing on Wednesday nights and still comfortably cruise with family over the weekend.
The interior design reflects a concerted effort to maximize usable space on a sub-30-foot platform. Utilizing a generous ten-foot beam, which was exceptionally wide for a boat of this length at the time, the cabin feels spacious and open. The layout features a traditional V-berth forward, followed by a full-width head compartment that offers more privacy than the walk-through heads of smaller pocket cruisers. High-grade teak bulkheads and trim were standard, showcasing the quality fit-out from the builder. A signature design choice was the bulkhead-mounted, drop-down dining table; when folded flush against the main bulkhead, it opens up the cabin sole to create an airy, open-concept living area. Standing headroom of approximately six feet and one inch further enhanced livability, making the vessel highly comfortable for extended stays.
Variations & Configurations
While the San Juan 29 shared its fundamental hull mold with its predecessor, the San Juan 28, several notable modifications distinguished the two models. The most significant structural change was a completely redesigned deck mold that featured a T-shaped cockpit. This configuration was engineered specifically to accommodate a steering pedestal and large destroyer wheel, allowing the helmsman to sit comfortably on the coaming while keeping the cockpit uncluttered.
Underneath the waterline, the San Juan 29 was standardized with a high-aspect fin keel and a balanced spade rudder. Unlike the smaller models in the builder's line that offered swing keels or centerboards, the 29 was configured strictly as a fixed-keel masthead sloop. It carried a heavy lead fin keel totaling 3,100 pounds. This heavy ballast package yielded an extraordinary 50 percent ballast-to-displacement ratio, a design choice prioritizing high initial stability and sail-carrying capability without resorting to a deep-draft racing keel.
Sailing Performance & Handling
On the water, the San Juan 29 behaves as a stiff, responsive, and light-footed performer. The physical implication of its massive 50 percent ballast-to-displacement ratio is a boat that stands up exceptionally well to its canvas, resisting excessive heeling and allowing the crew to carry a full mainsail and genoa into stronger breezes than most standard cruisers. The moderate displacement-to-length ratio of 248.59 indicates a well-balanced hull that tracks cleanly through a chop, avoiding the uncomfortable, violent pounding associated with flatter-bottomed racing hulls of the International Offshore Rule era.
With a sail area-to-displacement ratio of 18.15, the rig is powerful enough to generate excellent boat speed in light air, accelerating quickly out of tacks. At the helm, the balanced spade rudder and high-aspect fin keel provide splendid maneuverability and a tight turning radius, making the boat highly tactile and rewarding to sail. However, its capsize screening ratio of 2.18 indicates that the boat's wide beam makes it better suited for coastal and inland waters rather than true offshore or oceanic racing, where a ratio under 2.0 is typically preferred. Additionally, with a motion comfort ratio of 18.38, the boat's motion in a heavy seaway will be lively. It is a light displacement design that reacts quickly to wave action, requiring an active hand on the helm and proper sail trim to prevent excessive weather helm when gusts approach.
Market Snapshot & Economics
The San Juan 29 occupies a niche position on the brokerage market. Because its production run began just as the Clark Boat Company transitioned and the sailboat market of the mid-1980s began to contract, the model is significantly scarcer than the highly popular San Juan 28. When these boats do appear, they command a modest premium over their predecessors, primarily due to the desirability of the wheel steering system and the modernized T-shaped cockpit.
For buyers, the economics of owning a San Juan 29 are highly tied to refit status. Because the boats are now several decades old, the purchase price represents only a portion of the long-term investment. Prospective owners must expect to budget for standard vintage-boat remediation, including replacing aged standing rigging, upgrading deteriorated electronics, and addressing deck leaks. However, because the hull construction itself was structurally sound and used hand-laid fiberglass rather than chopper-gun laminate, the boat represents a solid, long-lasting platform that holds its value well if properly maintained.
Known Issues & Triage
Prospective buyers and current owners of the San Juan 29 should be vigilant regarding several documented technical vulnerabilities common to the model and its predecessor:
- Deck Core Wetness and Rot: The deck was constructed using a balsa-core sandwich. If deck hardware, stanchion bases, or the mast step have not been regularly re-bedded, water will penetrate the balsa core, leading to rot and soft spots. Triage involves drilling test core holes, drying out the compromised areas, and injecting epoxy, or in severe cases, cutting away the top fiberglass skin to replace the rotted balsa with modern composite core material.
- Chainplate Leakage: The stainless steel chainplates pass through the deck and are bolted directly to marine plywood bulkheads. Dennis Clark and early factory notices highlighted that these seals can degrade, allowing water to slowly rot the structural bulkheads. It is vital to inspect the bulkheads for staining or structural softening; rotten bulkheads must be replaced or structurally reinforced to prevent rig failure.
- Mast Step Compression: The mast is deck-stepped and supported internally by a wooden compression post that transfers the load down to the keel. If water has rotted the deck core directly under the mast step, or if the base of the compression post in the bilge has suffered from chronic standing bilge water, the deck will sag. This manifests as loose standing rigging that cannot be properly tensioned and misaligned cabin doors.
- Rudder Bushing Play: The high-performance spade rudder is susceptible to wear in its upper and lower bushings. Over time, this wear introduces "slop" or physical play in the helm. Replacing the worn bushings with custom-machined Delrin or bronze bearings is a standard yard fix.
- Keel-to-Hull Joint Weeping: The lead fin keel is secured to the hull with stainless steel keel bolts. Bilges must be inspected for weeping or rust streaks along the keel washers, which can indicate water ingress. If a "smile" is visible at the exterior keel-to-hull joint, the keel must be dropped, the mating surfaces cleaned, and re-bedded with modern polyurethane adhesive before retorquing the bolts.
Modernization & Upgrades
Owners of the San Juan 29 have successfully executed various upgrades to modernize the platform for contemporary cruising standards:
- Auxiliary Repowering: Many original boats were delivered with raw-water-cooled Yanmar diesels, such as the Yanmar 2QM15. Over time, the internal raw-water passages of these older engines suffer from scaling and corrosion, leading to chronic overheating. A common modernization step is replacing the original engine with a modern, fresh-water-cooled diesel (such as a Yanmar 2YM15 or a Nanni equivalent), which provides smoother operation, better fuel efficiency, and a reliable heat exchanger system.
- DC Electrical Overhaul and Lithium Conversions: The original factory electrical panels on these boats were minimal. Modern refits often include rewiring the entire DC system, installing marine-grade tinned wire, and upgrading to Lithium Iron Phosphate (LiFePO4) house battery banks. Because the engine compartment space is tight, the high energy density of lithium allows owners to triple their battery capacity in the same physical footprint while significantly reducing weight.
- Rigging and Sail Handling: To make the boat easier to handle short-handed, owners frequently run all halyards, reefing lines, and control lines aft to the cockpit via deck organizers and spinlocks. Upgrading to a modern mainsail stackpack system with lazy jacks and a high-cut furling jib greatly simplifies sail management for a single or double-handed crew.
The Verdict
The San Juan 29 is a highly capable, exceptionally stiff, and rewarding cruiser-racer that punches well above its size class. Its performance-oriented hull design, combined with a comfortable and cleverly packaged interior, makes it an ideal boat for coastal cruising, weekend club racing, and pocket-cruising families. While it requires vigilant maintenance to prevent water damage to its cored deck and bulkheads, a well-kept or modernized example represents a highly functional and economical entry into performance sailing.
Pros
- Exceptional stiffness and stability under sail due to a 50 percent ballast-to-displacement ratio.
- Sails beautifully in light-to-moderate air, making it highly competitive on the race course.
- The T-shaped cockpit and wheel steering provide excellent helmsman ergonomics.
- Spacious interior feel, aided by a wide ten-foot beam and a clever drop-down, bulkhead-mounted salon table.
- Solid fiberglass hull construction utilizing hand-laid laminate rather than a chopper gun.
Cons
- Balsa-cored deck is highly vulnerable to water intrusion and core rot around aging deck hardware.
- Chainplate and hull-to-deck joint leaks can easily compromise structural bulkheads if left unaddressed.
- The high capsize screening ratio of 2.18 limits the boat's suitability for serious offshore or blue-water passage making.
- The motion comfort of a lighter-displacement hull can feel lively and fatiguing in a heavy sea state.
- Access to the inboard engine and steering linkages can be physically tight for major maintenance tasks.
