Beneteau Oceanis 351 (1997 Version) Sailboat Review, Specs, and Listings

Design and Construction

Berret's brief was to reconcile performance with comfort, and his solution centered on a few deliberate innovations. The winged keel, shallow bilge, and lengthy waterline gave the hull unusually low drag for its era. The maximum beam is carried almost all the way to the transom, a then-radical decision that unlocked interior volume but also tilts the stability equation toward form rather than ballast. Her sail area to displacement ratio is quite low, yet the low-drag sections mean she picks up speed in a gentle breeze that would leave heavier cruisers sitting. The 351 shares her hull with the Beneteau First 35.7, which signals the performance intent behind that underbody. Construction relies on a balsa and fibreglass sandwich deck for stiffness without added weight, and the interior is stiffened by a tray moulding bonded into the inside of the hull — a detail that becomes significant when evaluating older examples.

Rig and Sailing Character

The 351 carries a Z-Spars twin-spreader masthead rig supported by caps, inters, aft lowers, and twin non-adjustable backstays. All sail control lines are led aft to facilitate shorthanded work, and a gas-sprung vang supports the boom while supplying a degree of mainsail flattening. In practice, the arrangement has a notable limitation: only two winches are provided, positioned on the coachroof, which makes handling the slab-reefed main genuinely awkward, particularly when a spinnaker is up simultaneously. Under sail she rewards a measured approach. Closed-hauled under full canvas she tracks at 5–6 knots and will helm herself, tacking through roughly 78–80 degrees without losing momentum. Her fastest point of sail sits around 50 degrees apparent, where her slippery hull can easily exceed hull speed in a Force 4–5. The wide, flat stern and single spade rudder do impose a discipline: over-canvassing causes the steering to become heavy and the rudder to lose its bite, allowing the boat to gripe head to wind. Reef on time and she is, by owner accounts, totally balanced — no need for the helm or autopilot upwind in 20 knots on a flat sea.

Accommodation and Interior

Below decks, the 351 genuinely earns its cruising-yacht status. Headroom reaches 1.90 m in the saloon, 1.88 m in the aft cabins, and 1.83 m forward, exceptional figures for the era. Two- and three-cabin configurations were offered. In the three-cabin layout, both aft cabins feature 2.0 m by 1.5 m berths with enough floor space for dressing and three opening hatches apiece. The forecabin carries a full-length vee berth with water tank and stowage beneath. The linear galley runs the full length of the U-shaped saloon and comes equipped with a full-size gimballed cooker, a large cool box or fridge, and twin sinks with hot and cold pressurised water. The arrangement has one honest weakness: the linear layout is not user-friendly at sea, where an L- or U-shaped galley would allow the cook to remain braced. Navigation is served by a forward-facing 80 cm × 57 cm chart table with ample chart stowage and a good electrical switch panel. The companionway steps have angled edges with deep non-slip treads, and a deep bridge deck prevents water venturing below.

Known Issues and Surveyor Findings

The 351 attracts a consistent set of findings in professional surveys, and buyers should approach any example with these specifically in mind. The balsa core in the deck sandwich has a tendency to shrink and decay, causing flexing underfoot; look for surface cracks as an early indicator. More structurally significant is the interior tray moulding: it was lightly and inadequately bonded into place from the factory, and if it separates from the hull the structure will flex, eventually producing cracks on the outside of the hull and deck. Rebonding with cloth, matting, and resin tabbings is the accepted repair. Keel attachment warrants close attention — cracks in the moulding around keel studs and distorted fastenings with undersized backing pads have been documented. The bedding compound between hull and keel has a finite service life and will need replacement on well-aged examples. Stanchion bases are reliably problematic: it is rare to find a 351 where they do not flex unless already reinforced. The teak-veneered cockpit inlays on early boats are often at the point of replacement, and the cockpit seat moulding should be checked for softness from below. There are also reports of blistering on the keel finish and rudder. The original Volvo Penta MD2030 engine is mechanically sound but the cooling system has a tendency to clog. Acrylic windows, hatch seals, and the hull-to-saildrive diaphragm are age-related consumables on any surviving example.

Refit Priorities

Given the age of the fleet, a considered refit sequence makes the difference between a workhorse and a liability. The tray moulding rebond is the foundational structural task and should precede any cosmetic work. Keel bolt replacement with larger backing pads has been necessary on multiple documented examples and is wise to pre-empt. The two-winch rig setup is a functional annoyance that owners consistently address by adding extra winches; fitting a pair of primary winches in the cockpit transforms shorthanded operation. Many owners have also converted from a folding two-blade prop to a fixed three-blade, which improves low-speed manoeuvring at the cost of some prop walk. The running rigging and power bank — on boats that have not had them replaced — are logical priorities on any example that has seen charter use.

The Verdict

The Oceanis 351 is a boat built around a clear idea: give a family real interior comfort without sacrificing the hull performance that makes sailing enjoyable. Berret largely succeeded. The low-drag underbody is genuinely quick for its displacement, the accommodation is spacious and well-lit, and when sailed within its limits the 351 is extremely easy to handle — capable of single-handed sailing in the right conditions. What it is not is a rough-weather offshore cruiser; the form-stability hull, marginal winch count, and linear galley all argue against extended blue-water passage making. Any purchase must be preceded by a thorough survey with explicit attention to the tray moulding bond, keel fastenings, and deck core.

Pros