Cornish Crabbers Shrimper 21 Information, Review, Specs

Sailing Performance & Handling

The Shrimper 21 is a stable, forgiving vessel that benefits from a relatively high displacement-to-length ratio, ensuring a "big boat" feel despite its 21-foot length. Its gaff rig, characterized by a low center of effort, allows the boat to carry its canvas longer into a freshening breeze than many modern fractional rigs. On the water, the 21 is noted for its improved windward performance over the Shrimper 19, thanks in part to a more refined foil shape on its galvanized steel lifting keel.

The boat’s handling is defined by its heavy-duty construction; with a displacement of approximately 1,400kg, it tracks well through a chop. An editorial review by Yachting Monthly highlighted that the 21 feels significantly more powerful than the 19, particularly when reaching, where the extra waterline length and beam provide a noticeable boost in hull speed. The lifting keel and pivoting rudder are core to its versatility, allowing the boat to navigate shallow estuaries or be beached upright on its bilge runners for a "lunch hook" in tidal sands. While the gaff rig involves more lines—specifically the peak and throat halyards—the Shrimper 21 is often praised for its logical layout, making it manageable for solo sailors familiar with traditional rigging.

Interior Comfort & Variations

The primary driver for the development of the 21 was the interior experience. Unlike the Shrimper 19, which is often considered a "sitting room only" cabin, the Shrimper 21 provides a legitimate four-berth layout suitable for coastal hops. The interior features a dedicated V-berth forward, separated from the main cabin by a bulkhead, which offers a degree of privacy rarely found in boats of this size.

The central salon area includes two full-length settee berths and a functional galley area typically equipped with a two-burner stove and a sink with manually pumped water. A significant upgrade in the 21 is the provision for a sea toilet (marine head) or a chemical toilet housed in a dedicated compartment under the V-berth. High-quality joinery in teak or oak, combined with a choice of upholstery, maintains the premium Cornish Crabbers feel. The company also offers "Classic" and "Modern" interior finish options, the latter utilizing more white flow-coat and light woods to enhance the sense of space.

Popular Mentions & Media

The Shrimper 21 has inherited the massive cultural footprint of the Shrimper brand, which is bolstered by one of the most active owner communities in the United Kingdom. It has been a recurring star at the Southampton International Boat Show and has been featured extensively in traditional yachting periodicals as the "gold standard" for the modern-classic trailer-sailer. While the 19 remains the "famous" sibling due to its 1,100+ hull numbers, the 21 has carved a niche among "downsizing" sailors who move from 35-foot yachts into something more manageable but still refined.

Known Issues & Buyer’s Checklist

Prospective buyers of a pre-owned Shrimper 21 should focus on the technical systems that differentiate it from smaller, simpler boats:

• Lifting Keel Mechanism: The keel is raised via a manual winch. Inspect the wire pendant for fraying and the winch for smooth operation. Because these boats are often kept on drying moorings, the keel casing can accumulate silt or shells; a sticking keel is a common issue that often requires a simple high-pressure wash.
• Engine Maintenance: Most Shrimper 21s are fitted with a 10hp Yanmar 1GM10 inboard diesel. While notoriously reliable, the exhaust mixing elbow is prone to carbon buildup and salt corrosion, which can lead to overheating.
• Spars and Rigging: The wooden spars (spruce or pine) require regular varnishing to prevent rot. Check the gaff jaws and the mast-hoops for wear. On newer models with carbon fiber masts (an optional upgrade), check the interface points where stainless steel fittings meet the carbon for signs of galvanic corrosion.
• Deck Hardware: Ensure the bowsprit pivot is secure and that the chainplates show no signs of water ingress into the deck core, though Crabbers are generally well-built with solid laminates in high-stress areas.

Community & Resources

Owners of the Shrimper 21 are supported by the Shrimper Owners Association, a highly organized group that manages regional rallies, technical wikis, and a robust second-hand market. The association is instrumental in organizing "Shrimper Week," where dozens of these vessels congregate for racing and social events. Technical support is also frequently sourced through the Cornish Crabbers Club, which covers the broader range of sibling models like the Adventure 17 and the Pilot Cutter 30.

The Verdict

The Cornish Shrimper 21 is an exceptional choice for the sailor who refuses to compromise on aesthetics but demands modern reliability and weekend-long comfort.

Pros:

• Classic, timeless design with high-quality British craftsmanship.
• Exceptional versatility due to the lifting keel and shallow draft.
• Strong resale value and an incredibly supportive owner community.
• True four-berth capacity in a trailerable package.

Cons:

• Significantly higher price point than contemporary mass-produced fiberglass boats.
• Gaff rig requires more maintenance and "strings to pull" than a simple Bermudan rig.
• The inboard engine adds complexity and weight compared to the outboard options found on the 19.