ADAMS 21
Specifications
Hull
| LOA | 21.16 ft |
| LWL | 17.49 ft |
| Beam | 7.91 ft |
| Draft | 4 ft/ 1.51 ft min |
| Displacement | 1,964 lb |
| Hull speed1.34·√LWL | 5.6 kn |
About the ADAMS 21
Originally called the SEAHORSE 6.
The Adams 21 is a compact fractional sloop designed by Adams and built by Jarkan Yachts in Australia, with production records indicating a single year of construction in 1977. With a hull count listed as unknown, this lightweight vessel features a displacement of 1964.0 lb and a beam of 7.91 ft, reflecting its role as a nimble day sailor or coastal cruiser.
- Best for:
- This boat is best suited for single-handers or couples seeking a manageable, lightweight day sailor for protected waters, given its low displacement and modest beam. It appeals to owners who prioritize ease of handling and storage over heavy offshore capability.
- Bluewater capability:
- With a low displacement of 1964.0 lb and a comfort ratio of 10.38, the Adams 21 is not designed for bluewater passage-making but is suitable for short coastal hops and protected waters. Its capsize ratio of 2.53 indicates moderate stability, reinforcing its classification as a day sailor rather than an offshore cruiser.
- Comparables:
- Comparable boats include the O'Day 21 and the Catalina 22, as they share similar length overall (21.16 ft) and target the same market of entry-level cruisers and day sailors from the late 1970s. These vessels offer similar fractional sloop rigs and comparable beam dimensions for easy trailering.
Performance
Market Price
Estimated Cost of Ownership
Based on 21.16ft LOA. Actual costs vary by condition, usage, and local rates.
Known Issues & Pre-Purchase Inspection
We don't have enough data on the ADAMS 21yet 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 ADAMS 21? 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 ADAMS 21?
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.
Already know your engine? Search all engines → to find its exact parts.
Used sails that fit the ADAMS 21
Checking eBay for sails sized to this boat's rig…