Oyster SJ-27 Information, Review, Specs

Sailing Performance & Handling

The SJ-27 is widely regarded as a "sailor’s boat," characterized by its nimbleness and exceptional windward ability. Unlike the more sedentary cruisers of its era, the SJ-27 features a high ballast ratio and a sophisticated fractional rig, which allows for precise sail trimming and responsiveness in light airs. The hull design reflects Stephen Jones’ mastery of the Quarter Ton rule, featuring a deep fin keel and a balanced spade rudder that provides a sensitive, dinghy-like feel at the helm.

In breezy conditions, the boat tracks surprisingly well for its size, though it requires active management of the traveler and backstay to keep the flat-bottomed hull from slamming in a chop. Technical analysis of the design reveals a displacement-to-length ratio that leans toward the lighter side of the spectrum for a 27-footer, ensuring it accelerates quickly out of tacks. Owners often report that the boat punches well above its weight class in club racing, particularly in upwind legs where its pointing ability is often superior to modern production boats of similar length. The cockpit is ergonomically designed for a racing crew, with primary winches and the mainsheet traveler positioned for rapid adjustment.

Interior Comfort & Variations

While the SJ-27 was designed with a focus on speed, the interior was remarkably well-appointed compared to the "stripped-out" racing machines of the time. The layout typically features five berths: a double V-berth in the forward cabin, two settee berths in the saloon, and a single quarter berth to starboard. The interior joinery, often finished in teak, reflects the early stages of Oyster’s commitment to high-quality craftsmanship, providing a sense of warmth that is often lacking in dedicated racers.

Headroom is modest—approximately 5'8" in the main saloon—which is standard for a performance boat of this vintage. The galley is functional but compact, usually consisting of a two-burner stove and a small sink. A key variation in the line involves the "Cruiser-Racer" versus "Full Race" specifications; while the hulls were identical, some units were fitted with more substantial cabinetry and pressurized water systems, whereas others were kept sparse to minimize weight. The SJ-27 shares its hull DNA with its larger sibling, the SJ-30, which offered a similar performance profile but with significantly more volume for extended cruising.

Known Issues & Buyer’s Checklist

Prospective buyers of an SJ-27 should focus their inspection on areas common to high-performance yachts of the late 70s and early 80s:

• Keel Attachment: Given their history as racing boats, some SJ-27s may have experienced "grounding" incidents. Inspect the fiberglass around the keel stump for stress cracks or evidence of structural repair.
• Deck Core Integrity: The decks were often constructed using a balsa core to save weight. Over time, moisture can ingress through improperly sealed deck hardware (cleats, stanchions, or tracks), leading to soft spots. A thorough percussion test of the deck is essential.
• Chainplates and Rigging: The SJ-27 utilizes a high-tension fractional rig. Inspect the chainplates where they meet the bulkhead for signs of movement or water leakage, and ensure the standing rigging has been replaced within the last decade.
• Original Engines: Many units were originally fitted with small Bukh or Yanmar diesel engines. Given the boat's age, these units may be reaching the end of their service life. Buyers should check for excessive smoking, oil leaks, or signs of heat exchanger corrosion.
• Osmosis: Like many GRP boats from the late 70s, the SJ-27 can be susceptible to osmotic blistering. A moisture meter reading during a haul-out is recommended to assess the hull's condition.

Community & Resources

Owners of the SJ-27 benefit from the broader Stephen Jones design community and the enduring prestige of the Oyster brand. While there is no longer a dedicated factory support team for these legacy models, the Oyster Owners' Heritage section of the builder's website provides historical context. Technical discussions and tuning guides are often found within Quarter Ton Class associations, where the SJ-27 remains a respected competitor in "Classic" divisions.

The Verdict

The Oyster SJ-27 is a rare find that offers a unique blend of heritage, performance, and build quality. It is an ideal vessel for the purist who values the tactile experience of sailing a well-balanced boat and who enjoys the prestige of owning an early piece of Oyster history.

Pros:

• Exceptional performance, particularly upwind and in light air.
• High-quality interior joinery compared to contemporary 27-foot racers.
• A "modern classic" aesthetic that remains attractive in any marina.
• Strong resale value due to the Oyster brand name.

Cons:

• Limited headroom and living space for long-term cruising.
• Age-related maintenance (deck core, engine) can be costly.
• The fractional rig requires more active tuning than a simple masthead setup.