IRWIN 28 MK IV
Specifications
Hull
| LOA | 28.42 ft |
| LWL | 23 ft |
| Beam | 9 ft |
| Draft | 4.5 ft |
| Displacement | 7,800 lb |
| Ballast | 3,200.3 lb |
| Hull speed1.34·√LWL | 6.4 kn |
Rig & Sails
| Iforetriangle height | 37 ft |
| Jforetriangle base | 12 ft |
| Pmainsail luff | 31.67 ft |
| Emainsail foot | 9.75 ft |
| FLforestay | 12 ft |
| Mainsail | 388.7 sq ft |
| Jib (100%) | 222 sq ft |
| Spinnaker | 377.4 sq ft |
Engine
| Commonly | Perkins, Yanmar, Westerbeke, Vetus, Ford |
About the IRWIN 28 MK IV
Keel/CB version also available.
Direct variant of the IRWIN 28 MK IV
Near-identical models — same hull, builder and designer, re-badged or lightly changed. Specs and owner-reported issues are typically shared across the group, so a sister model's page may carry detail this one doesn't.
Performance
Estimated Value
Limited DataEstimated Cost of Ownership
Based on 28.42ft LOA. Actual costs vary by condition, usage, and local rates.
Known Issues & Pre-Purchase Inspection
We don't have enough data on the IRWIN 28 MK IVyet to publish model-specific findings we'd stand behind — but here's a free general inspection checklist, built from our research into what actually goes wrong on boats of this kind.
Drawn from 7,029 documented issues across 2,391 models, ordered so the areas that most often turn up problems come first.
Own a IRWIN 28 MK IV? Reports from owners are what turn this into a model-specific checklist — and they're the reason the boats above it have one.
Similar Sailboats
Which engine powers your IRWIN 28 MK IV?
We haven't confirmed the engine for this model yet. If you own or know one, tell us — as owners report in, we build an accurate picture over time.
Brands sometimes mentioned for this model: Perkins, Yanmar, Westerbeke, Vetus — is it one of these?
Already know your engine? Search all engines → to find its exact parts.
Used sails that fit the IRWIN 28 MK IV
Checking eBay for sails sized to this boat's rig…