Islander 27 Information, Review, Specs

Sailing Performance & Handling

The influence of Alan Gurney is immediately evident in the Islander 27’s hull form. With a beam of 9 feet and a displacement of approximately 6,800 pounds, the boat is relatively stout for its length, yet it maintains a surprisingly nimble feel. Its masthead sloop rig and high ballast-to-displacement ratio (typically exceeding 40%) provide a stiff, stable platform that stands up well to a breeze. According to technical documentation maintained by the Islander 36 Association, the vessel was designed with a fin keel and a spade rudder, a configuration that allows for tight maneuvering in marinas and responsive tracking when close-hauled.

Under sail, the boat is known for its "big boat" feel. Unlike lighter 27-footers that can feel skittish in a chop, the Islander 27’s displacement helps it punch through waves without losing significant momentum. The Displacement-to-Length ratio (D/L) sits in the "moderate cruiser" range, which translates to a sea-kindly motion that reduces crew fatigue during longer coastal passages. While it may not be a light-air specialist, its ability to carry sail into the upper-teens before requiring a reef makes it a preferred choice for regions with consistent afternoon thermals, such as the San Francisco Bay or the Long Island Sound.

Interior Comfort & Variations

For a vessel of its era, the Islander 27’s interior was considered exceptionally spacious, largely due to Gurney’s use of a generous beam carried well aft. The layout is traditional yet functional, featuring a V-berth forward, an enclosed head to port with a hanging locker opposite, and a main salon with a settee that can often be converted into additional sleeping berths. Most hulls were finished with a mix of easy-to-clean fiberglass liners and warm teak bulkheads, striking a balance between utility and the aesthetic of a "proper yacht."

Headroom is a notable highlight, reaching nearly six feet in the main cabin, which was a significant selling point compared to the more cramped "low-profile" racers of the early 70s. While most 27s were built with a standard cruising layout, some variations exist in the galley configuration—typically located aft near the companionway for better ventilation and to keep the cook near the cockpit. The boat's sibling, the Islander 26 (often referred to as the Excalibur 26), offers a much narrower beam and more Spartan accommodations, whereas the later Robert Perry-designed Islander 28 shifted toward a more modern, voluminous interior with a slightly different performance profile.

Known Issues & Buyer’s Checklist

Prospective buyers should approach an Islander 27 with a focused inspection of its 50-year-old structural components. While the hulls are solidly built, common "gotchas" include:

• Deck Core Integrity: Like many boats of this vintage, the Islander 27 utilizes a balsa-cored deck. Moisture ingress around the mast step, chainplates, and stanchion bases is common. Any "spongy" feel underfoot should be evaluated for potential core rot.
• The "Atomic 4" Engine: Many original models were equipped with the Universal Atomic 4 gasoline engine. While reliable if maintained, buyers should inspect the manifold for cracks and ensure the fuel system meets modern safety standards. Some later models or repowered units may feature small diesels (like the Yanmar 1GM10), which are highly preferred for longevity and safety.
• Compression Post and Bulkheads: Check the structural integrity of the main bulkhead where the chainplates attach. Leaks from the chainplate covers can lead to rot in the plywood bulkhead, compromising the rig's tension. Similarly, inspect the base of the mast compression post for signs of settling or wood rot.
• Spade Rudder Bearings: Due to the age of the fleet, the spade rudder should be checked for "slop" or play in the bearings, and the rudder blade itself should be inspected for signs of delamination or water absorption.

Community & Resources

Owners of the Islander 27 benefit from one of the most active classic boat communities in North America. Although the Islander 36 Association is named after the flagship model, it serves as the primary technical repository for the entire Islander line, including the 27. This association provides access to original brochures, wiring diagrams, and a wealth of member-generated knowledge regarding DIY repairs and modifications.

The Verdict

The Islander 27 remains a top-tier choice for sailors seeking a "first big boat" or a budget-friendly coastal cruiser with pedigree. It successfully bridges the gap between the narrow, wet designs of the 1960s and the voluminous "floating condos" of the 1980s.

Pros:

• Robust construction and sea-kindly motion for its size.
• Designed by Alan Gurney, offering a superior balance of speed and stability.
• Spacious interior with respectable headroom for a 27-foot boat.
• Active and supportive owner community.

Cons:

• Many units still carry the original Atomic 4 gasoline engine, which requires meticulous maintenance.
• Vulnerable to standard "old boat" issues like deck core saturation and bulkhead rot.
• Spade rudder lacks the protection of a skeg-hung design in debris-heavy waters.