C&C 27 Mk I Information, Review, Specs

Sailing Performance & Handling

The sailing characteristics of the C&C 27 Mk I are defined by a high ballast-to-displacement ratio, which often hovered near 43%, providing a level of stiffness and "big boat" feel rarely found in 27-footers of that era. This stability allows the boat to carry its sail area longer into a blow than its contemporaries. The hull features a swept-back fin keel and a balanced spade rudder, a configuration that offers exceptional responsiveness. According to editorial analysis from Canadian Yachting, the 27 is remarkably well-balanced, capable of tracking straight with minimal helm pressure when the sail trim is dialed in.

Under sail, the Mk I is known for its ability to point high into the wind, a trait that made it a terror on the club racing circuits of the Great Lakes and the Atlantic coast. Because it was designed before the IOR (International Offshore Rule) began to heavily distort hull shapes with "tumblehome" and pinched ends, the Mk I hull is clean and efficient. While it lacks the raw downwind speed of modern ultralight sportboats, its sea-kindliness in a chop is superior, making it a preferred choice for coastal cruising in areas prone to sudden weather shifts.

Interior Comfort & Variations

The interior of the C&C 27 Mk I was remarkably sophisticated for 1970, utilizing a layout that maximized the 9-foot 2-inch beam. The cabin features a traditional arrangement: a V-berth forward, followed by a localized head and hanging locker, and a main salon with settee berths. A key identifying feature of the Mk I interior is the bulkhead-mounted folding table, which opens up the floor space during the day. The use of warm teak trim against white fiberglass liners became a C&C hallmark, creating an atmosphere that felt more expensive than its price tag suggested.

The Mk I is the progenitor of a long lineage of siblings. While the Mk I (1970–1972) established the platform, it was followed by the Mk II, which featured a revised counter-molded interior for easier cleaning. The Mk III, perhaps the most famous variant, arrived in 1974 with a taller rig and a deeper keel to improve performance under the IOR rules. Finally, the Mk IV updated the styling and increased the cockpit ergonomics. Despite these evolutions, the Mk I remains prized for its simplicity and the purity of its original lines, as detailed in the technical archives of the C&C Photo Album & Resource Center.

Popular Mentions & Media

The C&C 27's cultural footprint is most visible in the "One Design" racing world. It became the backbone of many yacht club fleets, particularly in Toronto, Vancouver, and Annapolis. The model is frequently cited in regional sailing histories as the boat that transitioned many families from day-sailing to offshore cruising. Its reliability and performance were so well-regarded that it was featured in various instructional sailing manuals and regional magazines throughout the 1970s and 80s as the "gold standard" for a 27-foot production sailboat.

Known Issues & Buyer’s Checklist

Prospective buyers should approach the C&C 27 Mk I with a focus on its composite structure and original mechanical systems.

• Balsa Core Integrity: Like many C&C designs, the deck is balsa-cored. If hardware (cleats, stanchions, winches) was not properly re-bedded over the decades, water can ingress and rot the core. Soft spots on the deck are a primary concern during inspection.
• The "C&C Smile": This refers to a vertical crack that can appear at the leading edge of the keel-to-hull joint. While often a cosmetic issue related to the flexing of the keel, it can indicate a need for retightening the keel bolts or reinforced glass work if the movement is excessive.
• Engine Transition: Many Mk I models were originally equipped with the Universal Atomic 4 gasoline engine. While a reliable engine if maintained, many owners have since repowered with smaller diesels. Buyers should verify the condition of the exhaust manifold and fuel lines on original gasoline units.
• Chainplates: The chainplates on the Mk I are bolted to the bulkheads. Over time, leaks at the deck level can cause the plywood bulkheads to rot, compromising the structural tension of the rig.

Community & Resources

The C&C 27 enjoys one of the most robust owner networks in North America. The C&C 27 Association is the primary hub for technical data, tuning guides, and historical records. They maintain a comprehensive database of hull numbers and provide specific advice for maintaining the various "Marks" of the boat. This community is particularly active in the Great Lakes region, where many hulls are still actively campaigned in PHRF racing.

The Verdict

The C&C 27 Mk I is a quintessential classic that balances the demands of a weekend cruiser with the soul of a racer. It remains an excellent entry-level yacht for those who value build quality and sailing performance over modern "condo-maran" interior volume.

Pros:

• Exceptional pointing ability and windward performance.
• High-quality interior joinery and classic aesthetics.
• Strong owner association and plentiful parts availability.
• Stable and predictable handling in heavy weather.

Cons:

• Balsa-cored decks are susceptible to moisture damage if neglected.
• Interior headroom (approx. 5'10") may be tight for taller sailors.
• Original Atomic 4 engines require specialized knowledge and safety precautions.