Islander 30 Mk II Information, Review, Specs

Sailing Performance & Handling

The Islander 30 Mk II is frequently praised for its balance and "sweet" helm, a hallmark of Robert Perry’s early work. Unlike many 30-footers of its era that leaned toward heavy-displacement "plastic classics," the Mk II features a moderate displacement-to-length ratio that allows it to perform respectably in light air while maintaining stability when the breeze freshens. According to a technical review in SpinSheet, the boat’s fin keel and spade rudder configuration provide a level of responsiveness that was significantly more advanced than the Mk I’s long-keel-and-attached-rudder design.

Owners often report that the boat tracks well upwind, though like many spade-rudder boats of this vintage, it can become "tender" if over-canvased. The sail area-to-displacement ratio suggests a boat that is easily driven; however, it rewards early reefing. In San Francisco Bay or the breezy conditions of the Santa Barbara Channel, sailors typically find that the Mk II remains dry and predictable until the wind exceeds 18 knots, at which point the helm will load up if the mainsail is not flattened or reefed. While not a pure racing machine by modern standards, it remains a competitive choice in PHRF (Performance Handicap Racing Fleet) fleets, often outperforming newer boats in its size class during light-air club races.

Interior Comfort & Variations

For a 30-foot boat designed in the 1970s, the Islander 30 Mk II offers a surprisingly voluminous interior. The layout is traditional yet refined, typically featuring a V-berth forward, a head with a hanging locker opposite, and a main salon with a settee that can often be converted into a double berth. The "L-shaped" galley, usually located to starboard near the companionway, was a significant selling point for cruisers, providing more counter space than the linear galleys found on many contemporary competitors.

The use of teak joinery throughout the cabin gives the Mk II a warm, traditional feel, though the quality of the finish can vary depending on the production year. One of the most noted features is the headroom, which approaches 6'2" in the main salon, a rarity for 30-footers of this vintage. While there were no major structural hull variants (such as a four-cabin version common in larger yachts), some Mk IIs were delivered with different engine options. While the venerable Universal Atomic 4 gasoline engine was the standard for early models, many later hulls were equipped with the more desirable Yanmar or Universal diesel engines. Owners who frequent the Islander 36 Association—which often serves as a technical hub for the 30 Mk II as well—note that the layout remained remarkably consistent throughout the production run, focusing on maximizing the utility of the 10-foot beam.

Known Issues & Buyer’s Checklist

Prospective buyers of an Islander 30 Mk II should prioritize a thorough inspection of the deck and structural components. Like many production boats from the 1970s and 80s, the Mk II used a balsa-cored deck. Over time, moisture can penetrate the core through improperly bedded deck hardware, leading to soft spots. This is particularly common around the chainplates and the mast step.

• Chainplates: The chainplates on the Mk II are bolted to plywood bulkheads. If the deck seals have leaked, these bulkheads can rot, compromising the structural integrity of the rig. Inspect the wood for discoloration or softening where the metal meets the timber.
• Mast Step: The mast is deck-stepped, supported by a compression post that transfers the load to the keel. If the mast step area has compressed due to moisture in the deck core, it can lead to rigging tension issues and "frowning" of the deck around the mast.
• Rudder Delamination: The spade rudder is a hollow fiberglass shell over a foam core. Water ingress can cause the internal steel structure to corrode or the fiberglass to delaminate.
• Atomic 4 Engines: If the boat still retains its original gasoline Atomic 4, specific attention must be paid to the cooling manifold and the fuel system to ensure safety and reliability. Many surveyors recommend a conversion to diesel for long-term cruising.

Community & Resources

The Islander 30 Mk II benefits from being part of one of the most active owner communities in the United States. While there is no standalone national association specifically for the 30 Mk II, it is a prominent member of the broader Islander community. The Islander 36 Association is the primary resource for technical data, maintenance logs, and historical documentation that applies to the 30-foot model. Additionally, because the boat was designed by Robert Perry, it is frequently documented in Perry's own writings and design retrospectives, providing owners with unique insight into the designer's original intent.

The Verdict

The Islander 30 Mk II remains one of the best values on the used market for sailors seeking a Robert Perry design on a modest budget. It strikes a rare balance between the "beefy" construction required for coastal cruising and the agility needed for enjoyable afternoon sailing. While it requires a vigilant eye for deck and bulkhead maintenance, its timeless lines and spacious interior ensure its continued popularity.

Pros

• Exceptional handling and balance thanks to Robert Perry’s hull design.
• Generous 6'2" headroom and a well-appointed L-shaped galley.
• Strong community support and high parts availability for common components.
• Capable of both club racing and weekend coastal cruising.

Cons

• Prone to balsa-core delamination and bulkhead rot if chainplates are not maintained.
• The spade rudder is vulnerable to water ingress and internal corrosion.
• Older models with Atomic 4 gasoline engines require high maintenance compared to modern diesels.