HULLMASTER 31
Specifications
Hull
| LOA | 31.25 ft |
| LWL | 22.67 ft |
| Beam | 9.25 ft |
| Draft | 4.67 ft |
| Displacement | 10,350 lb |
| Ballast | 4,350.1 lb |
| Hull speed1.34·√LWL | 6.4 kn |
Rig & Sails
| Iforetriangle height | 37.5 ft |
| Jforetriangle base | 12.5 ft |
| Pmainsail luff | 32 ft |
| Emainsail foot | 13.8 ft |
| FLforestay | 12.5 ft |
| Mainsail | 472.8 sq ft |
| Jib (100%) | 234.4 sq ft |
| Spinnaker | 398.4 sq ft |
About the HULLMASTER 31
… Ontario. HINTERHOELLER - It is believed that the last six D-31 hulls were built and delivered as kit boats by Hinterhoeller Yachts out of Ontario around 1982. Thanks to Richard for providing corrections. Also thanks to Mary Ellen for providing further corrections.
The Hullmaster 31 is a Canadian-built cruising sloop designed by Edward S. Brewer and constructed by Hullmaster Boats, Ltd. between 1973 and 1979. With a displacement of 10350.0 lb and a full/long keel, this vessel represents a classic, heavy-displacement design from the early 1970s.
- Best for:
- This boat is best suited for coastal cruisers and those seeking a stable, comfortable passage-making vessel, given its high comfort ratio of 32.73 and moderate sail area-to-displacement ratio of 15.38.
- Bluewater capability:
- With a low capsize ratio of 1.7 and a high displacement-to-length ratio of 396.59, the Hullmaster 31 is well-suited for bluewater cruising, offering excellent stability and seakeeping in heavy weather.
- Comparables:
- Comparable vessels include other Brewer designs like the Island Packet 32 or the Tartan 31, as they share similar full-keel configurations, heavy displacement characteristics, and a focus on safe, comfortable offshore cruising.
Performance
Pricing
We don't have market pricing data for the HULLMASTER 31 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 31.25ft LOA. Actual costs vary by condition, usage, and local rates.
Known Issues & Pre-Purchase Inspection
3 reported issues across 3 systems for the HULLMASTER 31, compiled from owner reports in sailing forums and owner-association material.
Unlock the full inspection report
Thinking of buying a HULLMASTER 31? 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 3 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 HULLMASTER 31?
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Brands sometimes mentioned for this model: Westerbeke — is it one of these?
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Used sails that fit the HULLMASTER 31
Checking eBay for sails sized to this boat's rig…