Irwin 37-2 Information, Review, Specs

Make
Irwin
Model
37-2
Builder
Irwin Yachts
Designer
Ted Irwin
Number Built
Production Year(s)
1976 - ??

The Irwin 37-2, frequently identified as the Mark II version of Ted Irwin’s highly successful 37-foot platform, represents a pivotal moment in the evolution of the American center-cockpit cruiser. While the original Irwin 37 was conceived with a nod toward the IOR (International Offshore Rule) racing era, the 37-2 was purposefully re-engineered to maximize the "liveaboard" potential that would define the brand’s legacy throughout the late 1970s and 1980s. With its high freeboard, expansive beam, and signature shoal-draft capability, the 37-2 was designed specifically for the thin waters of the Florida Keys and the Bahamas. It offered a level of interior luxury and privacy that was almost unprecedented for a vessel of its length during its production run.

Sailing Performance & Handling

The sailing characteristics of the Irwin 37-2 are defined by its heavy displacement and its keel/centerboard configuration. Designed primarily as a coastal cruiser, the boat lacks the pointing ability of a dedicated deep-draft racer but compensates with exceptional stability and a forgiving motion in a seaway. Most 37-2 models were delivered with a ketch rig, which allows for a versatile sail plan; in heavy weather, the "jib and jigger" (headsail and mizzen) configuration keeps the boat balanced and manageable without the need for aggressive reefing of the mainsail.

According to technical specifications maintained by the Irwin Yachts heritage site, the vessel features a moderate sail area-to-displacement ratio that favors steady cruising over light-air performance. Under power, the boat is generally equipped with a Yanmar or Perkins diesel engine, providing enough thrust to push through a chop, though the high windage of the center-cockpit design requires an attentive hand during low-speed docking maneuvers in a crosswind. Owners often report that while the boat is not a "greyhound" of the sea, it tracks well downwind and provides a dry, secure feeling in the cockpit due to its elevated position.

Interior Comfort & Variations

The true genius of the Irwin 37-2 lies in its interior volume. Ted Irwin was a master of "packaging," and the 37-2 utilizes nearly every inch of its 11-foot, 6-inch beam. Unlike many 37-footers of the era that felt cramped, the 37-2 features a genuine walkthrough from the main salon to the aft master stateroom. This aft cabin is the centerpiece of the boat, typically featuring a large double berth and a private head, a luxury that made the model a favorite for couples cruising with guests.

The main salon is airy and bright, often finished with a mix of teak veneers and molded fiberglass liners for ease of maintenance. The galley is traditionally located in the passageway or at the base of the companionway, offering decent bracing for cooking at sea. Sibling variants of this hull include the earlier Mark I (37-1), which had a less refined deck mold and a different interior layout, and the later Irwin 38, which utilized a similar hull form but modernized the lines and updated the cockpit ergonomics. The 37-2 remains the most sought-after of the mid-sized center cockpits because it hit the "sweet spot" of being small enough for a couple to handle yet large enough to feel like a permanent home.

Known Issues & Buyer’s Checklist

Prospective buyers of an Irwin 37-2 should approach the inspection with a focus on the structural "aging" common to 1970s production boats. While the hulls are generally robust solid fiberglass, several specific areas require scrutiny:

  • Chainplate Corrosion: The chainplates on many Irwin models are glassed into the hull or hidden behind cabinetry. Over decades, water seepage can lead to crevice corrosion that is difficult to detect without invasive inspection.
  • Deck Core Integrity: Like most boats of this era, the 37-2 uses a balsa-cored deck. Soft spots around stanchion bases, the windlass, and the mast step are common if the hardware has not been periodically re-bedded.
  • Fuel Tank Material: The original aluminum or iron fuel tanks are often nearing the end of their lifespan. Replacing the tank in an Irwin 37-2 can be a major undertaking, sometimes requiring the removal of parts of the cockpit floor or interior joinery.
  • Centerboard Trunk: The cable and pulley system for the centerboard should be checked for wear. If the board hasn't been cycled regularly, it can become stuck due to marine growth or fouled by a corroded pin.

Community & Resources

The Irwin 37-2 benefits from one of the most dedicated owner communities in the sailing world. The Irwin Yacht Owners Association provides a central hub for technical manuals, original brochures, and a directory of sister ships. Because so many of these boats were used in the Caribbean charter trade and later as private cruisers, there is a deep "institutional knowledge" regarding refit projects, such as repowering or converting the ketch rig to a more modern sloop configuration.

The Verdict

The Irwin 37-2 is a superlative choice for the budget-conscious cruiser who prioritizes living space and shallow-water access over raw racing speed. It remains one of the most affordable ways to acquire a true center-cockpit "great cabin" layout.

Pros:

  • Exceptional Volume: Offers the interior space and privacy of a much larger vessel.
  • Thin Water Capability: The keel/centerboard design is ideal for the Bahamas and East Coast estuaries.
  • Ketch Rig Versatility: Provides numerous sail options for heavy-weather balance and ease of handling.
  • Active Community: Strong parts availability and peer support for DIY owners.

Cons:

  • High Windage: The tall profile can make the boat difficult to handle in tight slips during high winds.
  • Light Air Performance: The heavy displacement and moderate sail plan make for slow progress in light breezes.
  • Maintenance Access: Certain systems, particularly chainplates and fuel tanks, are notoriously difficult to access for repair.

Measurements

Construction & Hull

Construction Material
Fiberglass
Hull Type
Monohull Sailboat
Keel Type
Fin
Rudder
1x Skeg-Hung
Ballast
7800 lbs
Displacement
20000 lbs
Water Capacity
-
Fuel Capacity
-

Dimensions

Length Overall (LOA)
37 ft
Waterline Length (LWL)
30 ft
Beam
11.5 ft
Draft
4 ft
Max Headroom
-
Air Draft
-
Hover over a measurement
IJPE FS LOALWL

Rig & Sails

Rig Type
Cutter
P (Main Luff)
35.5 ft
E (Main Foot)
12.5 ft
I (Foretriangle Height)
42 ft
J (Foretriangle Base)
17.5 ft
Forestay Length (est)
45.5 ft
Sail Area
589 sqft

Calculations

Sail Area / Displacement (SA/D) Ratio
12.79
Ballast / Displacement Ratio
39
Displacement / Length Ratio (D/L) Ratio
330.69
Comfort Ratio
37.23
Capsize Screening Formula
1.69
Hull Speed
7.34 kn