Island Spirit 37 Sailboats for Sale

Layouts on the Used Market

The used market leans toward the four-cabin, two-head charter configuration, which was the more commercially attractive layout during the production run. These hulls offer symmetrical owner and guest quarters forward in each hull, with the galley and saloon occupying the bridgedeck. Both the owner-oriented three-cabin layout and the full charter four-cabin variant turn up with reasonable frequency, so buyers unwilling to compromise on sleeping arrangements need not despair, but they should expect to wait a little longer for the right specification. Ex-charter hulls make up a substantial share of available inventory, and that provenance cuts both ways: charter boats often received conscientious annual haul-outs mandated by classification requirements, but they also absorbed significantly higher hourly running time and less attentive guest handling than privately owned examples.

Equipment and Common Upgrades

The Island Spirit 37's production era predates many systems that modern bluewater sailors treat as standard, so used examples have almost universally been brought forward by successive owners. Autopilots, radar, and chartplotters are commonly fitted across the market — finding a hull without basic electronic navigation and self-steering would be unusual. Lithium battery banks, inverters, and air conditioning are also widely found, reflecting the boat's popularity as a liveaboard platform where house loads matter as much as sailing performance.

Solar panels, a cockpit bimini, and a freezer are commonly found on boats from this design, often added early in a hull's private ownership phase after charter retirement. Hardtop structures over the cockpit are a frequent owner upgrade that meaningfully improves livability in tropical waters. Teak decks and AIS transponders are common enough that their absence on a well-priced boat should prompt questions rather than concern.

Watermakers, spinnakers, dinghy davits, and short-handed sailing setups — furling code zeros, electric primary winches, cockpit line management — appear more selectively and tend to mark hulls that transitioned from charter to serious blue-water private use. Swim platforms, trampoline replacements, and Starlink antenna installations are increasingly seen on boats that have been updated in recent years. When a hull carries several of these upgrades together, it generally signals an owner who invested meaningfully in the boat, which is worth weighing alongside the condition of the core structure.

What to Inspect

The Island Spirit 37's greatest structural concern lies in the bridgedeck and hull-to-deck joints. The bridgedeck area is subject to wave slamming loads on any catamaran, and on older examples it is worth probing every inch of the bridgedeck underside and the area around the forward beam bulkheads for delamination and core saturation. Soft spots respond clearly to careful knocking and flex testing; a surveyor with specific multihull experience is strongly preferred over a generalist.

The hulls themselves are solid laminate below the waterline, but the deck and superstructure incorporate cored construction. Water ingress through stanchion bases, deck hardware, and hatches is the most common vector for core damage over a boat's life, and given the high hours many of these hulls accumulated in charter service, assume that every piece of deck hardware has leaked at some point and verify that the underlying core is intact. Osmotic blistering on the hull bottoms is consistent with the production era and is generally manageable, but its extent and depth should be assessed by a moisture meter survey before purchase.

Running rigging and sail inventories on ex-charter boats are frequently tired. Budget for a full standing rigging replacement if the wire has not been renewed within a reasonable service interval — chainplates, toggle pins, and furler bearings deserve the same attention. The Yanmar auxiliary engines are reliable workhorses, but raw-water impellers, heat exchangers, and zincs are maintenance items that deferred owners let slide; a compression test and oil analysis on both engines is non-negotiable. Sail drives and propeller shafts should be checked for play and bearing wear, and the anodes protecting each hull appendage should be fresh before any survey haul-out.

Deck hardware specific to this design — traveler cars, mainsheet blocks, and the twin helm stations — should be cycled under load during sea trial. Original winches may be undersized for a shorthanded couple trying to manage a fully battened main; many boats have been upgraded, but verify that load paths and backing plates were handled properly when aftermarket gear was installed.

Availability and Buyer's Takeaway

The Island Spirit 37 circulates most actively in North American waters, particularly along the US East Coast, the Gulf of Mexico, and the Caribbean circuit. Mediterranean listings appear with moderate frequency, reflecting the boat's appeal to European liveaboards who value the volume-to-cost ratio. Pacific and Australasian examples exist but are less commonly encountered.

For a buyer who does the inspection work honestly, this is a boat that delivers genuine offshore capability and comfortable interior volume at a realistic entry point into blue-water catamaran cruising. The key is separating the well-maintained privately owned examples from the tired charter graduates that have not been properly restored. A hull with a documented private ownership phase, recent rig inspection, dry cores, and healthy engines represents what this design can be. Before making an offer, work through this checklist:

• Commission a surveyor with specific multihull experience, including a haul-out
• Moisture-meter the full deck and hull topsides, focusing on hardware penetrations
• Probe the bridgedeck underside and forward beam areas for delamination
• Pull service records on both Yanmar engines; perform compression test and oil analysis
• Inspect standing rigging, chainplates, and furler bearings for age and fatigue
• Test autopilot, chartplotter, radar, and all DC systems under realistic load
• Verify watermaker membrane condition if fitted; confirm battery bank health
• Sail under load and cycle all sheet and halyard systems through a full tack and jibe
• Confirm the dinghy davit or swim platform installation is properly backed if present
• Ask directly about the boat's charter history and request any available maintenance logs