KER 40
Specifications
Hull
| LOA | 40.03 ft |
| LWL | 40.03 ft |
| Beam | 13.62 ft |
| Draft | 8.53 ft |
| Displacement | 10,692 lb |
| Hull speed1.34·√LWL | 8.5 kn |
Rig & Sails
| Iforetriangle height | 52.6 ft |
| Jforetriangle base | 15.9 ft |
| Pmainsail luff | 54.4 ft |
| Emainsail foot | 17.5 ft |
| FLforestay | 15.9 ft |
| Mainsail | 931.4 sq ft |
| Jib (100%) | 417.3 sq ft |
| Spinnaker | 990.3 sq ft |
About the KER 40
The Ker 40 is a high-performance fractional sloop designed by Jason Ker and built by McConaghy Boats, with production records indicating a build year of 2010. While the exact hull count is unspecified in the source data, the vessel is characterized by a displacement of 10692.0 lb and a LOA of 40.03 ft, reflecting a lightweight, racing-oriented construction.
- Best for:
- This boat is best suited for performance-oriented coastal cruisers and short-handed racers who prioritize speed and handling over heavy bluewater comfort, given its low D/L ratio of 74.41 and fractional rig configuration.
- Bluewater capability:
- With a capsize ratio of 2.48 and a comfort ratio of 12.74, the Ker 40 is designed for performance rather than heavy offshore passage-making, making it suitable for protected coastal waters and short offshore passages rather than extended bluewater cruising.
- Comparables:
- Comparable boats include the Nauticat 42 and the Beneteau First 40.7, as they share similar fractional sloop rigs, lightweight displacement profiles, and a focus on performance sailing from the same era.
Performance
ORC Performance Data(11 certificates)
Measured performance data from ORC (Offshore Racing Congress) certificates.
Polar Diagram
Boat speed (kn) vs. true wind angle. Source: ORC
Racing Ratings
Triple Number
ORC Measured
Sail Areas (ORC)
Speed Table (kn)
| TWA \ TWS | 4 | 6 | 8 | 10 | 12 | 14 | 16 | 20 | 24 |
|---|---|---|---|---|---|---|---|---|---|
| 52° | 5.4 | 7.0 | 7.8 | 8.2 | 8.4 | 8.5 | 8.7 | 8.8 | 8.8 |
| 60° | 5.7 | 7.3 | 8.1 | 8.4 | 8.7 | 8.9 | 9.0 | 9.2 | 9.2 |
| 75° | 5.9 | 7.5 | 8.3 | 8.8 | 9.2 | 9.4 | 9.7 | 10.0 | 10.1 |
| 90° | 5.8 | 7.4 | 8.2 | 8.9 | 9.4 | 9.9 | 10.3 | 10.9 | 11.3 |
| 110° | 5.5 | 7.2 | 8.3 | 9.0 | 9.6 | 10.1 | 10.6 | 11.9 | 13.1 |
| 120° | 5.3 | 7.1 | 8.3 | 9.2 | 9.9 | 10.6 | 11.2 | 12.5 | 13.7 |
| 135° | 4.6 | 6.4 | 7.9 | 8.8 | 9.7 | 10.9 | 12.1 | 14.0 | 16.1 |
| 150° | 3.8 | 5.4 | 6.8 | 7.8 | 8.7 | 9.5 | 10.6 | 13.5 | 17.2 |
| Beat VMG | 3.4 | 4.6 | 5.4 | 5.8 | 6.0 | 6.1 | 6.2 | 6.3 | 6.2 |
| Run VMG | 3.3 | 4.7 | 5.8 | 6.8 | 7.5 | 8.2 | 9.2 | 11.7 | 14.9 |
Pricing
We don't have market pricing data for the KER 40 yet. If you own one, help other buyers — what did you pay for it? Reports build a community price estimate over time.
Estimated Cost of Ownership
Based on 40.03ft LOA. Actual costs vary by condition, usage, and local rates.
Known Issues & Pre-Purchase Inspection
12 reported issues across 7 systems for the KER 40, compiled from owner reports in sailing forums and owner-association material.
Unlock the full inspection report
Thinking of buying a KER 40? 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 12 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 KER 40?
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: Yanmar, Kubota — is it one of these?
Already know your engine? Search all engines → to find its exact parts.
Used sails that fit the KER 40
Checking eBay for sails sized to this boat's rig…