MASON 33
Specifications
Hull
| LOA | 33.75 ft |
| LWL | 25.42 ft |
| Beam | 10.83 ft |
| Draft | 5 ft |
| Displacement | 14,269 lb |
| Ballast | 5,319.5 lb |
| Hull speed1.34·√LWL | 6.8 kn |
Rig & Sails
| Iforetriangle height | 44.8 ft |
| Jforetriangle base | 14.6 ft |
| Pmainsail luff | 38.3 ft |
| Emainsail foot | 14.75 ft |
| FLforestay | 14.6 ft |
| Mainsail | 632.1 sq ft |
| Jib (100%) | 327 sq ft |
| Spinnaker | 556 sq ft |
About the MASON 33
Mason design # S-116.
The Mason 33 is a robust, heavy-displacement cruiser designed by Al Mason and built by Ta Shing Yacht Building in TAIWAN between 1984 and 1989, with a total production run of 20 hulls. Its substantial displacement of 14269.0 lb and full keel design prioritize stability and seakeeping over speed, resulting in a comfortable but moderate performance profile.
- Best for:
- This boat is best suited for conservative coastal cruisers and those seeking a stable, heavy-weather capable vessel for extended offshore passages, particularly those who value comfort and safety over high-speed performance.
- Bluewater capability:
- With a D/L ratio of 387.81, a capsize ratio of 1.79, and a full/long keel, the Mason 33 is well-suited for bluewater cruising due to its exceptional stability and resistance to capsizing in heavy seas.
- Comparables:
- Comparable boats include the Cal 34 and O'Day 35, which share similar full-keel, heavy-displacement characteristics and target the same market of traditional cruisers seeking proven offshore reliability.
Performance
Estimated Value
Low ConfidenceEstimated Cost of Ownership
Based on 33.75ft LOA. Actual costs vary by condition, usage, and local rates.
Known Issues & Pre-Purchase Inspection
21 reported issues across 9 systems for the MASON 33, compiled from owner reports in sailing forums and owner-association material.
Unlock the full inspection report
Thinking of buying a MASON 33? 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 21 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 MASON 33?
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, Westerbeke, Kubota, Perkins — is it one of these?
Already know your engine? Search all engines → to find its exact parts.
Used sails that fit the MASON 33
Checking eBay for sails sized to this boat's rig…