IRWIN 40 MKII
Specifications
Hull
| LOA | 40.83 ft |
| LWL | 31.17 ft |
| Beam | 12.17 ft |
| Draft | 6.25 ft |
| Displacement | 16,890 lb |
| Ballast | 6,499.3 lb |
| Hull speed1.34·√LWL | 7.5 kn |
Engine
| Commonly | Perkins, Yanmar, Westerbeke, Vetus, Ford |
About the IRWIN 40 MKII
Shoal Draft vers: 4.25' Bal. 7000 lbs. Keel/CB vers: BU 4.25' BD 9.5'. Bal. 7000 lbs. Similar to IRWIN 39/40 CITATION.
The Irwin 40 MkII is a classic American cruising sloop designed by Ted Irwin and built by Irwin Yachts (USA) in 1980. With a production run limited to this single year and an unknown total hull count, it represents a specific iteration of the popular Irwin 40 line.
- Best for:
- This vessel is well-suited for coastal cruisers and weekend sailors who prioritize a comfortable, stable platform with a moderate comfort ratio of 27.47. Its dimensions and layout appeal to those seeking a manageable 40-foot boat for protected waters.
- Bluewater capability:
- With a displacement of 16890.0 lb and a capsize ratio of 1.9, the boat exhibits moderate offshore stability, though its single-year production and lack of specific bluewater build history suggest it is better suited for coastal passages than extended ocean crossings.
- Comparables:
- Comparable boats include the Cal 40 and O'Day 40, which share similar beam and displacement characteristics from the late 1970s and early 1980s. These vessels offer similar interior volumes and cruising amenities for buyers in this size class.
Direct variant of the IRWIN 40 MKII
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 40.83ft LOA. Actual costs vary by condition, usage, and local rates.
Known Issues & Pre-Purchase Inspection
We don't have enough data on the IRWIN 40 MKIIyet 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 40 MKII? 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 40 MKII?
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 40 MKII
Checking eBay for sails sized to this boat's rig…