Design Brief & Intent
The Sunstar 28 was designed to meet a demanding brief: a pocket cruiser capable of tackling the complex tidal currents, heavy channels, and sudden blows of the Pacific Northwest, while remaining light and agile enough for local club racing. Unlike the mass-produced California fiberglass of the era, which often prioritized maximum interior volume over hull integrity, Spencer Boats approached the Sunstar 28 with the same uncompromising standards they applied to their larger, semi-custom offshore yachts. The result is a hand-laid fiberglass hull with structural bulkheads bonded directly to the skin. Down below, the boat reflects a traditional maritime aesthetic, boasting high-quality teak joinery, robust cabinetwork, and a thoughtful layout that maximizes the boat’s 9.5-foot beam. This focus on premium execution was meant for the discerning sailor who wanted a boat that was easy to slip and single-hand, but who refused to compromise on structural safety or aesthetic appeal.
Rigs & Configurations 2
To suit different sailing environments and owner preferences, the Sunstar 28 was offered in two primary masthead sloop configurations: the Standard Rig and the factory-option Tall Rig. Both variations utilized a high-aspect masthead configuration, which simplifies the standing rigging and places the center of effort lower to minimize heeling. However, the Tall Rig configuration increased the mast height by roughly two feet, which expanded the total sail area to capture the light, persistent summer breezes typical of sheltered inland waterways. Below the waterline, the boat is equipped with a deep fin keel drawing five feet, which works in tandem with a balanced spade rudder to provide exceptional lift and tight turning capabilities. Propulsion is provided by an inboard diesel engine, with a 15-horsepower Yanmar unit serving as the standard factory drivetrain, offering more than enough muscle to punch through heavy tidal currents when the wind dies.
Sailing Performance & Handling
Under sail, the Sunstar 28 displays a balanced and lively character that rewards attentive helm input. With a ballast-to-displacement ratio of 36.51 percent, the boat is notably stiff, standing up well to its canvas and offering a secure, stable platform when the breeze freshens. Its sail area-to-displacement ratio of 21.25 indicates a highly powerful sail plan. In light airs, where heavier cruising designs of this size might flounder, the Sunstar 28 accelerates quickly and maintains good speed. Conversely, this efficiency means that the boat should be reefed early; once the true wind climbs past 12 to 14 knots, tucking a reef into the mainsail preserves a light, responsive helm and prevents excessive weather helm.
With a displacement-to-length ratio of 246.91, the boat occupies the moderate-displacement category. It possesses enough momentum to drive through a short chop without getting knocked stopped, a critical asset when transiting narrow, wind-starved passages. The motion comfort ratio of 21.6 confirms a motion that is active but predictable—it will feel lively in open water but lacks the harsh, jerky acceleration of modern, ultra-light flat-bottomed designs. Furthermore, the boat's capsize screening ratio of 1.95 sits comfortably below the offshore safety threshold of 2.0, verifying that this compact cruiser has the stability and self-righting capacity required for coastal ocean work.
Known Issues & Triage
Despite its high-end pedigree, any fiberglass boat of this vintage requires careful inspection. The primary concern on the Sunstar 28 is deck core integrity. Spencer Boats built the deck using a balsa-cored laminate. Over decades, water can migrate past degraded sealant around stanchion bases, the mast step, grab rails, and chainplate penetrations. Left unaddressed, this moisture rots the balsa core, resulting in soft spots and structural delamination. Prospective buyers should thoroughly sound the deck with a phenolic hammer to identify voids or wet areas.
A second high-signal triage point is the chainplate bulkheads. The stainless steel chainplates pass directly through the deck and bolt to marine plywood bulkheads. If the deck seals fail, water runs down the chainplates and rots the structural timber. If a visual inspection reveals dark staining or softness in the plywood, the affected bulkhead section must be cut out and replaced or structurally sistered. Additionally, the spade rudder turns on synthetic sleeve bearings that wear over time. Helm play or a noticeable vibration while motoring is a key indicator that the rudder bushings need to be dropped and replaced.
Modernization & Upgrades
A dedicated community of owners has kept the Sunstar 28 relevant by integrating modern yacht systems. While the original 15-horsepower Yanmar engines are legendary for their longevity, some owners have opted to repower with modern freshwater-cooled engines like the Beta Marine 14, which drops easily into the existing engine beds. Given the boat's moderate 6,300-pound displacement, electric propulsion conversions are also a highly viable modern alternative. Installing a clean, quiet electric drive paired with a 48-volt lithium iron phosphate battery bank provides an elegant solution for day-sailors and weekend cruisers.
Electrical upgrades are almost universal on surviving hulls. Upgrading the DC system to lithium iron phosphate (LiFePO4) house batteries allows for rapid charging and steady voltage, which in turn supports modern upgrades like 12-volt refrigeration and high-draw navigation electronics. Mounting rigid or semi-flexible solar panels on a custom bimini or the cabin top provides a reliable way to keep the house bank topped up during extended periods on the hook. On deck, owners frequently replace the original standard winches with modern self-tailing models and lead all halyards, reefing lines, and control lines back to the safety of the cockpit using modern deck organizers and rope clutches.
The Verdict
The Sunstar 28 is a standout classic pocket cruiser that successfully blends the performance pedigree of Robert Perry and Edwin Monk Jr. with the legendary construction standards of Spencer Boats. It is an ideal vessel for couples or small families looking for a solid, stiff, and highly maneuverable coastal cruiser that can hold its own in light-air club racing. While its vintage requires diligent checking of the deck core and bulkheads, a well-maintained or modernized Sunstar 28 offers a level of build quality, traditional warmth, and sailing performance that modern, high-volume production boats in this size range rarely match.
Pros:
- Strong light-air performance supported by a powerful sail plan.
- Excellent build quality with robust fiberglass layup and hand-finished teak joinery.
- High ballast-to-displacement ratio provides a stiff, stable ride under sail.
- Compact footprint that is easy to single-hand and highly economical to slip.
- Capsize screening ratio below 2.0 provides an added margin of safety for coastal cruising.
Cons:
- Risk of balsa-core deck rot and bulkhead damage from neglected chainplate leaks.
- Limited production run means parts-sourcing and model-specific advice require active owner-community networking.
- Original raw-water-cooled engines and aging DC electrical systems are likely due for replacement or overhaul.
- Spade rudder sleeve bearings wear down and require periodic replacement to prevent helm play.
