C&C 27 Mk IV Information, Review, Specs

Sailing Performance & Handling

The C&C 27 Mk IV is widely regarded as a "driver’s boat," known for its responsive helm and ability to point exceptionally close to the wind. This version utilized a higher-aspect-ratio rig than its predecessors, which significantly improved its performance in light-to-moderate air. With a displacement of approximately 5,500 lbs and a ballast-to-displacement ratio hovering around 38%, the boat remains stiff and predictable in a breeze, though it requires early reefing compared to the heavier Mk I.

The spade rudder and fin keel configuration allow for nimble handling, which is a hallmark of Rob Ball's design philosophy for C&C. Handling in a seaway is generally described as "kindly" for a vessel of its size, though its relatively light weight means it can be active in a chop. Owners often note that the Mk IV tracks better than many modern "fat-bottomed" cruisers because of its deep, narrow entry. The technical evolution of the hull is detailed in the C&C 27 Association's Technical History, which notes that the Mk IV’s taller mast and moved shroud chainplates allowed for tighter sheeting angles and better windward performance than earlier marks.

Interior Comfort & Variations

For a 27-foot vessel designed in the early 1980s, the Mk IV offers a remarkably functional layout. The interior is characterized by a traditional teak-heavy finish that provides a warmth often lacking in contemporary fiberglass boats. The standard configuration includes a V-berth forward, a central salon with twin settees (the port side often converting to a double), and a compact galley located aft near the companionway to minimize motion during meal preparation.

The Mk IV specifically benefited from a "stepped" deck mold that increased interior volume and headroom, providing roughly 6 feet of clearance in the main salon—a luxury for a boat under 30 feet. The boat also features an enclosed head, a significant upgrade for cruisers moving up from daysailers. In terms of sibling models, the Mk IV was the last of the "original" hull shape. It was followed by the C&C 27 Mk V (often called the "New 27"), which was a radical departure featuring a much wider beam and a flat-bottomed hull. Other siblings include the C&C 29 Mk I, which offers a similar aesthetic and performance profile for those requiring slightly more elbow room and a dedicated quarter-berth.

Popular Mentions & Media

The C&C 27 series has a storied history in Great Lakes racing, particularly in the Hamilton and Toronto regions where one-design fleets thrived for decades. It is a frequent subject of retrospectives in "Good Old Boat" magazine, where it is often cited as the quintessential entry-level cruiser-racer. The boat’s longevity is further cemented by its status as a "standard" in the PHRF (Performance Handicap Racing Fleet) books, serving as a benchmark against which many other coastal cruisers are measured.

Known Issues & Buyer’s Checklist

Prospective buyers of a C&C 27 Mk IV should focus their inspection on three primary areas synonymous with the build techniques of the 1980s:

1. Balsa Core Saturation: Like most C&C models of this era, the Mk IV used balsa coring in the deck and, in some areas, the hull. Moisture ingress around stanchion bases, chainplates, and mast steps can lead to delamination. A thorough "tap test" with a phenolic hammer or a moisture meter reading is essential.
2. 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 cosmetic, it can indicate a need to tighten keel bolts or address a compression issue in the grid.
3. Mast Step Compression: The Mk IV’s deck-stepped mast relies on a support post. If the wood or core beneath the mast step has rotted due to water seepage, the cabin top can sag, affecting rig tension and door alignment.
4. Engine Health: While early versions had the gasoline Atomic 4, many Mk IV units were fitted with the Yanmar 1GM or 1GM10 diesel. These are reliable but can suffer from "mixing elbow" clogs and internal corrosion if the raw-water cooling system hasn't been maintained.

Community & Resources

The primary hub for this model is the C&C 27 Association, which serves as a technical wiki and community forum. This group maintains original brochures, sail plans, and a database of hull numbers. Additionally, the C&C Photo Album & Resource Center provides a comprehensive digital archive of historical documents and specifications for the entire C&C lineage.

The Verdict

The C&C 27 Mk IV remains a premier choice for sailors who refuse to sacrifice performance for comfort. It is a robust, rewarding vessel that bridges the gap between a club racer and a weekend family cruiser.

Pros:

• Performance: Exceptional light-air speed and windward ability.
• Build Quality: High-end finishes and hardware compared to other production boats of the 1980s.
• Resale & Parts: A massive existing fleet means parts are easy to find and the boat remains liquid on the used market.
• Headroom: Surprising interior volume for a 27-foot hull.

Cons:

• Maintenance Intensity: Balsa core requires vigilant sealing of all deck penetrations.
• Cockpit Size: The T-shaped cockpit can feel cramped with more than four adults on board.
• Age: Most units will require significant updates to standing rigging and electronics if they haven't been meticulously maintained.