Moody S31 Information, Review, Specs

Sailing Performance & Handling

The Moody S31 is characterized by its 7/8ths fractional rig, which allows for a more adjustable sail plan compared to older masthead designs. With a relatively high ballast ratio, the boat is known for its stiffness and ability to carry full sail longer than many of its contemporaries. It was offered with two primary keel configurations: a deep fin keel for maximum lift and a twin (bilge) keel version for those navigating tidal estuaries with drying moorings.

In handling, the S31 is often described as predictable and light on the helm. In an editorial review by Yachting Monthly, the vessel was praised for its balance; the boat tracks well and does not exhibit the heavy weather helm often found in high-volume cruisers when pressed. The cockpit is ergonomically designed for short-handed sailing, with primary winches within reach of the helmsman. While it lacks the sheer speed of a dedicated racing yacht, its performance on a reach is respectable for its class, benefiting from the modern underwater profile and reduced wetted surface area compared to the older Moody 31.

Interior Comfort & Variations

Despite its modest 30-foot 9-inch length, the interior of the S31 is remarkably spacious, a hallmark of Bill Dixon’s design philosophy. The layout typically features two separate cabins and a central saloon, providing privacy rarely found in older boats of this size. The aft cabin is particularly noteworthy, featuring a large double berth that extends under the cockpit sole, a feat achieved by the boat's generous beam and relatively high topsides.

The saloon utilizes a folding central table and two settee berths, with a compact L-shaped galley to starboard and a dedicated navigation station to port. Construction quality remains high, with extensive use of teak or cherry joinery that avoids the "modular" plastic feel of many modern production yachts. While the S31 was the core model, it was part of a broader "S" series strategy that included the larger Moody S38, which shared similar design language and performance-oriented rigging. Buyers should note that while the layout remained largely consistent, later models often featured upgraded upholstery and improved ventilation through additional opening portlights.

Known Issues & Buyer’s Checklist

Prospective buyers should focus their inspections on several technical areas specific to the S31 and its era of construction:

1. Saildrive Seal: Most S31s were fitted with Volvo Penta engines and saildrives. The rubber diaphragm seal has a manufacturer-recommended replacement interval (typically seven years). Documentation of this replacement is a critical check for any buyer.
2. Headlining Issues: Like many British-built yachts of the 1990s, the foam backing on the vinyl headlining can deteriorate over time, leading to sagging. This is a labor-intensive cosmetic repair.
3. Rudder Bearings: Inspect the spade rudder for any lateral movement or "play" in the bearings, which can lead to vibration under power and less precise steering.
4. Deck Hardware Sealing: Technical notes from the owner community suggest checking for moisture around the stanchion bases and the chainplates. While the deck is generally robust, neglected seals can lead to localized core dampness.
5. Standing Rigging: Given that many S31s still carry older rigs, a professional survey of the fractional stays is essential, especially focusing on the spreader brackets and the forestay attachment.

Community & Resources

The primary hub for technical support and historical data is the Moody Owners Association. This organization maintains an extensive archive of original blueprints, technical manuals, and a repository of owner-led modifications. The association is recognized as one of the most active owner groups in the United Kingdom, providing a vital network for sourcing spare parts for discontinued hardware.

The Verdict

The Moody S31 is a quintessential "pocket cruiser" that manages to feel significantly larger than its dimensions suggest. It is an ideal choice for a small family or a couple seeking a seaworthy vessel capable of cross-channel hops or coastal exploration.

Pros:

• Excellent interior volume with a genuine two-cabin layout.
• The 7/8ths fractional rig offers better tuning and performance than previous models.
• Available in a twin-keel configuration for tidal versatility.
• High build quality from the Marine Projects era.

Cons:

• Interior headlinings are prone to sagging and may require replacement.
• Limited stowage for long-term liveaboard use compared to the larger 34 or 36 models.
• Saildrive maintenance can be more costly than traditional shaft-drive systems.