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Yamaha 25 2
Designer: Yamaha/Ichiro Yokoyama  ·  Builder: Yamaha (Jap)  ·  First built: 1976
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About the Yamaha 25 2

Designed by Ichiro Yokoyama and built by Yamaha beginning in 1976, this 25-footer represents Japanese boat building during an era when the country was making significant inroads into recreational sailing markets. The Yamaha 25 2 combines practical coastal cruising capabilities with reasonable performance characteristics in a compact package. With a fin keel and rudder on skeg configuration, the boat offers good maneuverability while maintaining directional stability. The 5.40-foot draft provides adequate upwind performance without limiting access to many shallow anchorages. At 3,748 pounds displacement with 1,433 pounds of ballast, the design strikes a balance between stability and performance that suits weekend cruising and club racing applications. The masthead sloop rig carries 298 square feet of sail area, delivering a sail area-to-displacement ratio of 19.81 that indicates spirited performance in moderate conditions. The comfort ratio of 14.93 suggests motion characteristics typical of boats designed more for daysailing and coastal cruising rather than extended offshore passages. The capsize screening value of 2.31 indicates the boat is best suited for coastal waters rather than ocean crossings. This Yamaha makes an excellent choice for sailors seeking an affordable entry into cruising or those wanting a capable boat for protected water sailing and short coastal hops.

Core Dimensions
LOA (Length Overall) 24.77 ft / 7.55 m
LWL (Waterline Length) 19.25 ft / 5.87 m
Beam 8.96 ft / 2.73 m
Max Draft 5.40 ft / 1.65 m
Displacement 3,748.00 lb / 1,700 kg
Ballast 1,433.00 lb / 650 kg
Sail Area (Reported) 298.00 ft² / 27.69 m²
Headroom 5.58 ft / 1.70 m
Design & Construction
Hull Type Fin with rudder on skeg
Rigging Type Masthead Sloop
Construction FG
Designer Yamaha/Ichiro Yokoyama
Builder Yamaha (JAP)
First Built 1976
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Performance Ratios
SA/Displacement Sail Area to Displacement ratio measures how much sail power a boat has relative to its weight. Higher values mean more performance and speed.
Under 14 — Heavy cruiser, slow14–18 — Cruising sailboat18–22 — Cruiser/racerOver 22 — Performance racer
 19.81
Ballast/Displacement Ballast to Displacement ratio shows what percentage of the boat's total weight is ballast. Higher values generally mean better initial stability and stiffer sail carrying.
30–35% — Typical cruiser35–45% — Stiff performance boatOver 45% — Racing oriented
 38.23
Displacement/Length Displacement to Length ratio measures how heavy a boat is relative to its waterline length. Lower values mean a lighter, faster boat.
Under 100 — Ultralight racer100–200 — Light cruiser/racer200–300 — Moderate cruiser300–400 — Heavy cruiserOver 400 — Very heavy
 234.56
Comfort Ratio Ted Brewer's Comfort Ratio predicts how comfortable a boat will feel in offshore conditions. Higher values mean a steadier, more comfortable motion in a seaway.
Under 20 — Uncomfortably rough20–30 — Acceptable coastal30–40 — Good offshore comfortOver 40 — Very comfortable offshore
 14.93
Capsize Screening Formula The USHS Capsize Screening Formula estimates offshore capsize risk. Lower is safer — values under 2.0 are considered acceptable for offshore sailing.
Under 2.0 — Safe for offshore2.0–2.2 — Borderline offshoreOver 2.2 — Coastal use recommended
 2.31
Hull Speed Hull Speed is the theoretical maximum speed of a displacement hull, calculated from waterline length. Most cruising sailboats reach this speed in moderate conditions. 5.88 kn
S# (Speed Number) The Speed Number (S#) is a quick performance index. Higher values indicate a faster, more powerful design relative to its size.
Under 3.0 — Slow cruiser3.0–5.0 — Average cruiser5.0–7.0 — Performance cruiserOver 7.0 — Racer
 2.6
Pounds/Inch Immersion Pounds per Inch Immersion (PPI) tells you how much weight is needed to sink the boat one inch. Useful for calculating how additional gear and stores affect waterline. 616.29 pounds/inch
SA/Displacement (Calc) Calculated Sail Area to Displacement ratio using actual measured sail dimensions rather than reported values. More precise than the reported SA/Disp figure. 19.83
Rig Dimensions
I (Foretriangle Height) 32.80 ft / 10.00 m
J (Foretriangle Base) 9.80 ft / 2.99 m
P (Mainsail Luff) 29.90 ft / 9.11 m
E (Mainsail Foot) 9.20 ft / 2.80 m
SA Fore 160.72 ft² / 14.93 m²
SA Main 137.54 ft² / 12.78 m²
SA Total (100%) 298.26 ft² / 27.71 m²
Est. Forestay Length 34.23 ft / 10.43 m
Engine & Accommodations
Engine Make Yanmar
Engine Type Diesel
Horsepower 8
Fuel Capacity 7 gals / 25 L
Water Capacity 10 gals / 36 L
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