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Sailboat Specifications

Irwin 43 Cc Mkii

Cutter · Fin With Rudder On Skeg

Designed by Ted Irwin · Built by Irwin Yachts (Usa) · First built 1985

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LOA 45.50 ft  ·  Beam 13.58 ft  ·  Displacement 26,000.00 lb  ·  Sail Area 1,022.00 ft²  ·  Cutter  ·  Fin With Rudder On Skeg
About the Irwin 43 Cc Mkii Sailboat

Built by Irwin Yachts from 1985 onward, this center cockpit cruiser represents Ted Irwin's approach to comfortable bluewater sailing. At 45.5 feet overall with a 35.5-foot waterline, the design balances interior volume with sailing performance through its moderate displacement of 26,000 pounds and generous beam of 13.58 feet. The cutter rig configuration provides versatile sail handling options for varying conditions, while the fin keel with rudder on skeg offers a good compromise between performance and directional stability. With 1,022 square feet of sail area driving the hull to a theoretical maximum of 7.98 knots, the boat delivers respectable passage-making speed without sacrificing comfort. The center cockpit layout maximizes privacy in the aft cabin while providing excellent visibility for watch-keeping. A comfort ratio of 32.35 indicates this design prioritizes seakindly motion over pure speed, making extended offshore passages more pleasant for the crew. The capsize screening formula of 1.84 suggests good stability characteristics for ocean sailing. With 4.92 feet of draft and fiberglass construction, the boat can access most cruising destinations while maintaining the structural integrity needed for serious coastal and offshore cruising adventures.

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Known Issues View all 10 issues →
High
Irwin's deck-to-hull joint on the 43 CC MkII uses an outward-turning flange that is through-bolted and bedded, but the bedding compound frequently fails, allowing water intrusion into the hull liner and causing hidden delamination along the joint. Pay close attention to the toerail fasteners and the joint itself during survey.
High
The balsa-cored deck used throughout Irwin production of this era is prone to moisture intrusion, particularly around chainplate through-bolts, stanchion bases, and deck hardware. Wet core areas are widespread on older examples and may require extensive deck replacement.
High
The encapsulated or bolted fin keel on these boats is known to develop weeping around the keel-to-hull joint, and the keel bolt area should be carefully inspected for rust staining, soft laminate, or movement. Keel bolt access is limited from inside the bilge.
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Dimensions & Specifications
LOA (Length Overall) 45.50 ft / 13.87 m
LWL (Waterline Length) 35.50 ft / 10.82 m
Beam 13.58 ft / 4.14 m
Max Draft 4.92 ft / 1.50 m
Displacement 26,000.00 lb / 11,793 kg
Ballast 8,000.00 lb / 3,629 kg
Ballast Type Lead
Sail Area (Reported) 1,022.00 ft² / 94.95 m²
Design & Construction
Hull Type Fin with rudder on skeg
Rigging Type Cutter
Construction FG
Designer Ted Irwin
Builder Irwin Yachts (USA)
First Built 1985
Associations Irwin Facebook Group
Related Sailboats Irwin 43 Cc Mki · Formosa 46 · Oceanic 46 Brewer · Endeavour 43 · First 456 Beneteau
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Engine & Accommodations
Engine Type Diesel
Horsepower 62
Fuel Capacity 105 gals / 397 L
Water Capacity 180 gals / 681 L
Frequently Asked Questions

What is the Irwin 43 Cc Mkii's sail area to displacement ratio?

The Irwin 43 Cc Mkii has a Sail Area to Displacement ratio (SA/D) of 18.71. Values between 14–18 are typical cruising sailboats; 18–22 is cruiser/racer; over 22 is performance racing.

What is the Irwin 43 Cc Mkii's comfort ratio?

The Irwin 43 Cc Mkii has a Ted Brewer Comfort Ratio of 32.35. A ratio over 30 indicates good offshore comfort; over 40 is very comfortable offshore.

Is the Irwin 43 Cc Mkii safe for offshore sailing?

The Irwin 43 Cc Mkii has a Capsize Screening Formula value of 1.84. Values under 2.0 are considered acceptable for offshore sailing; under 1.8 is ideal.

What is the hull speed of the Irwin 43 Cc Mkii?

The theoretical hull speed of the Irwin 43 Cc Mkii is 7.98 kn knots, calculated from its waterline length.

How much does a Irwin 43 Cc Mkii weigh?

The Irwin 43 Cc Mkii has a displacement of 26,000.00 lb and a length overall (LOA) of 45.50 ft.

Who designed the Irwin 43 Cc Mkii?

The Irwin 43 Cc Mkii was designed by Ted Irwin, first built in 1985.