Irwin 37 mark 4

The Irwin 37 mark 4 is a 37.01ft cutter designed by Ted Irwin and built in fiberglass by Irwin Yachts between 1977 and 1982.

It accomodates 5 people in 2 cabins plus salon.

The Irwin 37 mark 4 is a heavy sailboat which is under powered. It is reasonably stable / stiff and has an excellent righting capability if capsized. It is best suited as a bluewater cruising boat. The fuel capacity is average. There is a good water supply range.

Irwin 37 mark 4 for sale elsewhere on the web:

Main features

Model Irwin 37 mark 4
Length 37.01 ft
Beam 11.52 ft
Draft 5.51 ft
Country United states (North America)
Estimated price $ 30000

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Sail area / displ. 13.67
Ballast / displ. 33.50 %
Displ. / length 330.69
Comfort ratio 37.23
Capsize 1.70


Hull type Monohull fin keel with rudder on skeg
Construction Fiberglass
Waterline length 29.99 ft
Maximum draft 5.51 ft
Displacement 19995.90 lbs
Ballast 6702.04 lbs
Hull speed 7.34 knots

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Rigging Cutter
Sail area (100%) 627 sq.ft
Air draft 0 ft ??
Sail area fore 367.48 sq.ft
Sail area main 259.84 sq.ft
I 41.99 ft
J 17.49 ft
P 35.60 ft
E 14.60 ft


Nb engines 1
Total power 40 HP
Fuel capacity 55 gals


Water capacity 187 gals
Headroom 0 ft
Nb of cabins 2
Nb of berths 5
Nb heads 2

Builder data

Builder Irwin Yachts
Designer Ted Irwin
First built 1977
Last built 1982
Number built 0 ??