IRWIN 10/4
Specifications
Hull
| LOA | 25.33 ft |
| LWL | 21.83 ft |
| Beam | 10.33 ft |
| Draft | 6.67 ft/ 2.75 ft min |
| Displacement | 7,000 lb |
| Ballast | 1,999.9 lb |
| Hull speed1.34·√LWL | 6.3 kn |
Rig & Sails
| Iforetriangle height | 35 ft |
| Jforetriangle base | 12 ft |
| Pmainsail luff | 30.16 ft |
| Emainsail foot | 12.25 ft |
| FLforestay | 12 ft |
| Mainsail | 409.5 sq ft |
| Jib (100%) | 210 sq ft |
| Spinnaker | 357 sq ft |
Engine
| Commonly | Perkins, Yanmar, Westerbeke, Vetus, Ford |
About the IRWIN 10/4
The Irwin 10/4 is a 25.33 ft cutter designed by Ted Irwin and built by Irwin Yacht & Marine Corporation (USA) from 1975–1982. With a displacement of 7000.0 lb and a comfort ratio of 21.09, this vessel is recognized for its robust construction and balanced performance, though specific hull build counts are not definitively recorded in the source data.
- Best for:
- This boat is well-suited for coastal cruisers and those seeking a manageable, sturdy vessel for weekend trips or short offshore passages, particularly given its cutter rig configuration which aids in single-handed handling.
- Bluewater capability:
- With a capsize ratio of 2.16 and a displacement of 7000.0 lb, the Irwin 10/4 demonstrates solid offshore stability and seaworthiness, making it capable of bluewater cruising despite its modest size.
- Comparables:
- Comparable boats from this era include the Cal 2-36 and O'Day 23, as they share similar displacement ranges and coastal cruising roles, though the Irwin 10/4 distinguishes itself with a heavier ballast ratio and full keel design.
Performance
Estimated Value
Low ConfidenceAsking price by model year
5 listings · boat years 1976–1976 · median $6,000
Each dot is one listing · hover for details · dashed red line marks the median · obvious data-entry outliers (top & bottom 2.5%) excluded.
Estimated Cost of Ownership
Based on 25.33ft LOA. Actual costs vary by condition, usage, and local rates.
Known Issues & Pre-Purchase Inspection
8 reported issues across 5 systems for the IRWIN 10/4, compiled from owner reports in sailing forums and owner-association material.
Unlock the full inspection report
Thinking of buying a IRWIN 10/4? This is an in-depth report on the faults this model is known for — so you know exactly what to check when you walk the boat. For the price of a coffee.
- ✓ All 8 specific issues — severity, symptoms & fixes
- ✓ Model-specific pre-purchase inspection checklist
- ✓ Downloadable PDF to take to your surveyor — yours to keep
One-time $2.99 · secure checkout by Stripe · instant access · 30 days online, PDF yours to keep
Similar Sailboats
Which engine powers your IRWIN 10/4?
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Brands sometimes mentioned for this model: Perkins, Yanmar, Westerbeke, Vetus — is it one of these?
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Used sails that fit the IRWIN 10/4
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