MACWESTER 27
Specifications
Hull
| LOA | 26.97 ft |
| LWL | 23 ft |
| Beam | 9.15 ft |
| Draft | 4.92 ft |
| Displacement | 7,385 lb |
| Ballast | 2,468.8 lb |
| Hull speed1.34·√LWL | 6.4 kn |
Engine
| Yanmar | 1GM109 hpSee all 53 parts → |
| Volvo Penta | MD11C23 hpSee all 23 parts → |
About the MACWESTER 27
Designed by C. J. S. Roy and built by Macwester Marine C. Ltd. (UK) in 1972, the Macwester 27 is a compact, heavy-displacement cruiser with a displacement of 7385.0 lb and a comfort ratio of 24.72. While the exact hull count is unknown, the fleet is characterized by its robust construction and twin/triple keel options, offering a stable platform for its era.
- Best for:
- This boat suits coastal cruisers and weekenders who prioritize stability and comfort over speed, particularly those seeking a manageable masthead sloop with a max draft of 4.92 ft for varied anchorage access.
- Bluewater capability:
- With a capsize ratio of 1.88 and a D/L ratio of 270.97, the Macwester 27 possesses the heavy displacement and low center of gravity necessary for offshore passage making, though its single-year production run suggests limited long-term parts support compared to mass-produced designs.
- Comparables:
- Comparable to other 1970s European heavy-displacement cruisers like the Hallberg-Rassy 35 or early O'Day models, the Macwester 27 shares a focus on seaworthiness and interior volume over planing performance, distinguished by its unique multi-keel configuration.
Performance
ORC Performance Data(1 certificate)
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 | 6 | 8 | 10 | 12 | 14 | 16 | 20 |
|---|---|---|---|---|---|---|---|
| 52° | 3.6 | 4.3 | 4.9 | 5.3 | 5.6 | 5.8 | 6.0 |
| 60° | 3.9 | 4.6 | 5.2 | 5.6 | 5.9 | 6.0 | 6.2 |
| 75° | 4.1 | 4.8 | 5.5 | 5.8 | 6.0 | 6.2 | 6.5 |
| 90° | 4.0 | 4.8 | 5.5 | 5.9 | 6.1 | 6.3 | 6.7 |
| 110° | 3.8 | 4.5 | 5.2 | 5.8 | 6.1 | 6.3 | 6.7 |
| 120° | 3.5 | 4.3 | 5.0 | 5.6 | 6.0 | 6.2 | 6.6 |
| 135° | 3.1 | 3.9 | 4.6 | 5.2 | 5.7 | 6.0 | 6.4 |
| 150° | 2.7 | 3.5 | 4.2 | 4.8 | 5.4 | 5.8 | 6.3 |
| Beat VMG | 2.3 | 2.8 | 3.1 | 3.4 | 3.7 | 3.9 | 4.0 |
| Run VMG | 2.4 | 3.2 | 3.9 | 4.5 | 5.1 | 5.6 | 6.2 |
Estimated Value
Low ConfidenceAsking price by model year
7 listings · boat years 1972–1972 · median $3,788
Each dot is one listing · hover for details · dashed red line marks the median · obvious data-entry outliers (top & bottom 2.5%) excluded.
Estimated Cost of Ownership
Based on 26.97ft LOA. Actual costs vary by condition, usage, and local rates.
Articles & Reviews
Known Issues & Pre-Purchase Inspection
16 reported issues across 8 systems for the MACWESTER 27, compiled from owner reports in sailing forums and owner-association material.
Unlock the full inspection report
Thinking of buying a MACWESTER 27? 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 16 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
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Engine Parts & Maintenance
The engines most commonly fitted to this model. “All parts” opens the engine's full catalogue; each part links to a matching listing on 
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Yanmar 1GM10
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Used sails that fit the MACWESTER 27
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