Design and Hull Form
Gurney's stated objective was a 36-foot yacht that would be competitive on the race course but also cruise a family comfortably, and the hull he produced achieves that balance with unusual elegance. The sheerline is flattish but gently concave, the fin keel moderate, and the rudder hung on a full skeg — a layout that predates the radical distortions later designers wrung from the International Offshore Rule. Because the I36 arrived during the IOR's infancy, before designers exploited the rule's loopholes, the hull avoided the pinched ends and excessive beam of later IOR machines. The result is a form that reads to modern eyes as clean, purposeful, and uncluttered.
Beam is moderate and carried well aft, providing meaningful hull volume in the quarters so the boat doesn't squat when loaded for cruising. Both deep and shoal-draft keels were offered; the deep-keel boat is generally about six seconds per mile faster, while the shoal version carries an additional 150 pounds of ballast to compensate for its higher center of gravity. The hull is solid fiberglass with a through-bolted plywood-cored deck topped with an aluminum toe rail, and the model was assembled in four major pieces — two hull halves, the deck, and the interior liner — taking roughly 700 hours of labor per boat.
Rig and Sailing Performance
The sailplan is a double-spreader sloop on an untapered aluminum spar stepped through the deck, with shrouds set well inboard and genoa tracks positioned just outboard of the cabin trunk to exploit tight sheeting angles. Sail area runs to approximately 612 square feet on a high-aspect rig, and owners consistently describe the boat as fast and stiff. The I36 will do eight knots and practically steer herself in 20 to 30 knots of wind without being overpowered, though the same reporters note she can feel sluggish in the lightest airs.
The boat is well-balanced under sail, a quality owner surveys confirm through the near-total absence of complaints about excessive weather helm. The original rig carries genoa overlaps as large as 180 percent, which can be unwieldy for short-handed sailing; modern cruising-oriented owners typically fit smaller, self-tacking headsails or a furling genoa, since the mainsheet traveler is positioned at the forward end of the companionway and trimming in heavy air demands a winch. Under the PHRF handicap system, well-sailed Islander 36s are still capable of podium finishes, and the largest active racing fleets remain concentrated in the San Francisco Bay area, where the boat's performance envelope suits the conditions.
Accommodations
Below decks the I36 presents a straightforward layout that makes efficient use of its 36 feet. A sizeable V-berth and a head-and-shower combination to port occupy the forward cabin, with full standing headroom carried all the way to the bow. The main saloon offers straight settees on both sides, separated by a table that folds against the forward bulkhead — a practical arrangement that opens up the cabin sole considerably. The starboard settee converts to a double berth.
An L-shaped galley to starboard includes a double sink, and most boats now carry a three-burner LPG stove in place of the original alcohol units. A nav station to port with a quarterberth behind it completes the layout, though the nav station has known limitations: it sits tucked under the sidedeck with a sloping sole in front of it, no chart stowage, and no seat. The galley shares the sloping-sole problem, making it difficult to work at the sink or reach the bottom of the icebox. These are the areas where the I36's 1970s origins show most clearly, and where creative owners have invested the most energy over the decades.
Companionway steps are genuine steps rather than a vertical ladder — a feature that earns consistent praise and makes moving in and out of the cabin easy even in a seaway. Ventilation is a persistent weakness: later production boats received an overhead hatch in the main cabin, but the forward cabin has no wet-weather ventilation provision, and the quarterberth beneath the cockpit offers no ventilation at all, a real liability in warmer climates.
Known Issues and Areas of Attention
The I36's long service life means most boats carry a layered history of systems work, some of it excellent and some requiring scrutiny. Chainplate integrity deserves close attention, with at least one owner survey respondent noting a lower shroud chainplate pulling free of the bulkhead. The mast step is another focal point: most 1970s Islander 36s have experienced mast step corrosion at the Kenyon spar and likely require the spar to be pulled and inspected. The area of hull structure near the mast is worth probing in any survey.
Some mid-1970s boats reported osmotic blistering, with incidence varying depending on whether the boat remained in warm water year-round or was hauled seasonally in colder climates. The foredeck core is vulnerable if fittings have been re-drilled without proper sealing. The cockpit presents two offshore limitations that prospective owners should weigh honestly: the cockpit drains are small and there is no bridgedeck, and the companionway dropboards cannot be securely fixed up to coaming level without blocking cabin access — a compliance issue for serious offshore work.
Engines present their own variety. The production run cycled through an Atomic Four, a Palmer P-60, a Perkins 4-108, a Westerbeke L-25, a Volkswagen-derived Pathfinder, and finally a Yanmar, and most original auxiliaries have since been replaced by owners. The mix of left- and right-handed propeller shafts across the fleet, combined with a range of fixed, folding, and feathering props, means backing behavior varies considerably from hull to hull. The large rudder and skeg are assets when maneuvering astern, but the technique of building speed in reverse and then idling down requires learning.
Refit Priorities
Because the I36 was produced with minimal change across fifteen years, even early hulls respond well to targeted modernization. The owners association at islander36.org has become a clearinghouse for refit solutions, and the collective knowledge accumulated there is one of the boat's genuine assets. The most impactful improvements owners have made center on a handful of recurring areas: updating nav electronics to fit the cramped chart table, converting fuel systems to propane, adding refrigeration, fitting pressure water, upgrading to self-tailing multi-speed headsail winches on the coaming, and replacing the original foam-and-vinyl headliner whose zipper fasteners tend to corrode shut. Where the vinyl headliner is being replaced, the work also provides access to the backs of deck fittings and coring that should be inspected and resealed.
A dodger is nearly universal on boats used for coastal cruising; on later-model I36s a molded breakwater aft of the companionway simplifies installation, while earlier hulls require a custom solution to manage the forward-sloping aft bulkhead. Ventilation upgrades — dorade boxes, cabin-top hatches, a Bomar-style opening hatch over the forward cabin — pay disproportionate dividends in liveability below.
The Verdict
The Islander 36 is a genuinely well-sorted racer-cruiser from an era when the label actually meant something. Alan Gurney's design philosophy produced a fast, stiff, and balanced boat that has rewarded competent sailors for decades and continues to hold its own in club racing. It is not an offshore passage-maker — the cockpit's limited drainage, absent bridgedeck, and modest structural scantlings place it firmly in the coastal category — but within that envelope it excels. The active owners community is a meaningful asset, not a cliché, and the consistency of the design across the production run means solutions developed for one hull generally apply to another.
Pros
- Hull proportions remain contemporary; no IOR-era compromises
- Fast, stiff, and well-balanced with low weather helm
- Comfortable, spacious main saloon for a 36-footer
- Large and active owners association with shared refit knowledge
- Easily shorthanded with modest equipment upgrades
- Genuine companionway steps rather than a ladder
Cons
- Nav station is cramped, seatless, and poorly configured for modern electronics
- Galley sole slopes awkwardly, limiting counter and icebox access
- No bridgedeck and undersized cockpit drains limit offshore capability
- Quarterberth lacks ventilation — a liability in warm climates
- Mast step corrosion common on 1970s boats; requires pulled spar to inspect properly
- Varied engine and prop combinations produce inconsistent handling under power
