O'Day 40 Information, Review, Specs

Sailing Performance & Handling

The O'Day 40 is frequently praised for its balance and predictable handling, a hallmark of the Hunt design office. Unlike earlier O’Day models that often prioritized shallow draft via centerboards, the 40 was typically equipped with either a deep fin keel or a highly efficient wing keel. The wing keel version, drawing roughly 4'11", was particularly popular for East Coast and Bahamian cruising, providing a low center of gravity without sacrificing access to shallow anchorages.

With a displacement-to-length ratio that leans toward "moderate-light," the boat remains surprisingly agile in light air. Editorial reviews from the period, including those archived by Practical Sailor, note that the boat tracks exceptionally well upwind, thanks in part to its fine entry and powerful stern sections. While it is a dedicated cruiser, its hull pedigree allows it to maintain a respectable pace that often surprises owners of more contemporary coastal cruisers. The steering is typically light, though the large spade rudder requires attention when running downwind in heavy seas to prevent rhythmic oscillation.

Interior Comfort & Variations

The interior of the O'Day 40 reflects the transition of 1980s yacht design toward "Euro-style" ergonomics combined with traditional American woodwork. The layout is dominated by a massive main salon featuring a U-shaped settee to port and a straight settee to starboard, centered around a large drop-leaf table. Because this hull was shared with the Jeanneau Sun Legend 41, the O'Day version benefited from a hull volume that was originally intended to accommodate up to three cabins in European charter layouts; however, O'Day generally optimized the space for two-cabin private ownership.

The master suite is located forward, featuring a large V-berth and private access to the forward head. The aft cabin is equally impressive, offering a large double berth that extends under the cockpit sole, providing a level of privacy rarely found in 30-footers of the same era. A second head is usually located adjacent to the companionway, serving as a convenient "wet locker" and day head. Variations of the O'Day 40 are rare, but the sister ship, the O'Day 39, serves as the primary technical sibling. The 39 featured a slightly different cockpit arrangement and stern rake, but they are often treated as the same vessel in technical discussions.

Known Issues & Buyer’s Checklist

Prospective buyers of an O'Day 40 should focus their surveys on several specific structural areas identified by long-term owners and marine surveyors:

• Hull Liner and Grid Bonding: Like many production boats of the 80s, the O'Day 40 utilizes a fiberglass structural grid bonded to the hull. In boats that have experienced a significant grounding, this bond can fail, particularly near the keel bolts. Surveyors should check for "crazing" or separation in the bilge area.
• Deck Core Integrity: The decks are balsa-cored. While robust, the hardware—specifically the stanchion bases and the oversized aluminum toe rail—can develop leaks over decades. Re-bedding this hardware is a common maintenance requirement to prevent core rot.
• Portlight Leaks: The original plastic-framed opening ports are prone to UV degradation and leaking. Many owners have replaced these with stainless steel or Newfound Metals units to preserve the interior teak.
• Mast Step Compression: The mast is deck-stepped, supported by a compression post that transfers loads to the keel grid. It is essential to inspect the base of this post for signs of moisture or sinking, which can occur if the wooden block at the base has rotted.

Community & Resources

The O'Day 40 remains a celebrated model within the O'Day Owners Association. This group provides a wealth of technical data and original manuals for the larger Hunt-designed models. Additionally, because of the hull’s shared history with Jeanneau, technical insights regarding the rudder and hull laminate can often be cross-referenced with Jeanneau Sun Legend 41 resources.

The Verdict

The O'Day 40 is a "sleeper" in the brokerage market, often providing more waterline and interior volume per dollar than its more famous competitors. It is a capable coastal and offshore cruiser that benefits from the timeless design work of the Hunt team.

Pros:

• Excellent hull design by C. Raymond Hunt Associates ensures superior sailing characteristics.
• Substantial interior volume with a functional two-head, two-cabin layout.
• High-quality teak joinery that provides a warmer feel than modern "molded" interiors.

Cons:

• The aging hull-to-deck joint and portlights require vigilant maintenance to prevent leaks.
• The spade rudder is vulnerable to debris and requires a thorough inspection for moisture.
• Limited production numbers compared to Catalina or Hunter make finding specific replacement parts (like custom castings) more difficult.