Jeanneau Sun Odyssey 51 Sailboats for Sale

Layouts on the Used Market

Two distinct accommodation arrangements circulate regularly, and the difference between them matters as much as the condition of the boat itself. The owner's version carries three cabins: a full-width aft master stateroom benefiting from the boat's generous beam, a forward double, and a single or pilot berth amidships. This layout maximises liveaboard comfort and is the arrangement most buyers seeking a personal bluewater yacht will prefer.

The four-cabin charter layout is equally well represented, as this model was popular with Mediterranean charter fleets. That version divides the aft section into two mirror-image aft cabins sharing a central head, reducing the master stateroom to something more modest. Ex-charter examples are common, and while they can be very well maintained, many have accumulated substantial hours and accumulated wear on soft furnishings, upholstery, and mechanical systems. Carefully distinguishing between a privately owned three-cabin boat and a retired charter vessel is the first filter a buyer should apply.

In both configurations the saloon is generous, the longitudinal galley to port offers serious counter and refrigeration space, and the cockpit — centred around the fixed social table and twin steering wheels — remains one of the more thoughtful deck arrangements of its era.

Equipment and Common Upgrades

Given the age of the hull, virtually every boat on the market has been meaningfully upgraded from factory specification. Solar panels are commonly fitted, often paired with an inverter and, on well-prepared bluewater examples, lithium batteries replacing the original lead-acid banks. Radar, AIS, autopilot, and chartplotter are near-universal at this point, with most owners having refreshed electronics at least once during their ownership.

Teak decks appear frequently, ranging from original factory teak in varying states of health to replacement synthetic or re-caulked natural teak laid by previous owners. A bimini and dodger combination is the norm rather than the exception, and electric winches — either factory or retrofit — are widely fitted given the sheer physical loads this rig generates.

Bow thrusters are a frequent owner upgrade, addressing the challenge of docking fifty feet of twin-wheel yacht in tight marina berths without crew. Furling mainsails appear regularly and represent a meaningful shorthanded convenience, though they should be evaluated alongside the condition of the mast and boom hardware. Dinghy davits are common on boats prepared for extended cruising. Watermakers, life rafts, and swim platforms are often seen. Asymmetric spinnaker gear and dedicated freezers are occasionally present on boats set up for longer passages.

What to Inspect

The Sun Odyssey 51's engineering has several model-specific vulnerabilities that a surveyor familiar with French production boats of this period will know to prioritise.

The internal chainplate tie-rod system is the most consequential item on the checklist. Rather than conventional external chainplates, rig loads are transferred via stainless steel rods to brackets bolted to structural bulkheads. Because these rods run behind cabinetry, tea-staining or moisture around the deck plates and behind joinery panels can indicate crevice corrosion or early bulkhead rot. Access panels must be removed and the full length of each rod and its mounting bracket physically inspected.

The chemically bonded coachroof windows are a known maintenance liability. Silvering or creeping of the black primer around the window perimeter signals bond failure, which leads to water ingress into the deck laminate and potentially the balsa core. Re-bedding these windows is a significant job requiring specific marine structural adhesives and primers — budget accordingly if any windows show deterioration.

The internal hull grid (the structural matrix) should be examined for tabbing failure, particularly near the mast step and keel stump. Delamination between the grid and hull skin is a manageable repair when caught early and a serious structural concern when ignored. Check the bilge carefully for any cracking or lifting at these joints.

The spade rudder and its bearings endure substantial loads at this scale. Excessive play in the steering system warrants close attention, as worn rudder bearings on a fifty-footer are not a minor inconvenience. The balsa-cored deck should be sounded systematically — any aftermarket fitting poorly sealed over the decades is a potential water-ingress point leading to core rot.

On ex-charter examples, add a thorough check of engine hours, impeller history, raw-water cooling condition, and the state of the Perkins or Yanmar diesel's heat exchanger and injectors. The 80 hp Perkins fitted to earlier hulls is robust but parts availability is now thinner than for the Yanmar that appeared in later production.

Availability and Buyer's Takeaway

This model circulates most actively in France, Spain, and Italy — reflecting its origins and its long history in Mediterranean charter fleets — and appears with reasonable regularity in Scandinavia and the United States. Martinique and other Caribbean markets occasionally surface examples that have completed transatlantic crossings and settled into warm-water cruising life. It is not a rare boat, but neither is it a commodity; patient buyers in any of those markets should find a reasonable selection to compare.

The Sun Odyssey 51 rewards the buyer who does thorough homework. The Farr hull, Category A ocean certification, twin-wheel cockpit, and genuine liveaboard volume represent enduring value. The age-related vulnerabilities are real but inspectable, and boats that have been conscientiously maintained through the decades represent some of the better value available in this size range.

Buyer's checklist:

• Confirm cabin layout (owner three-cabin vs charter four-cabin) before viewing
• Remove all access panels and physically inspect chainplate tie-rods and bulkhead brackets
• Examine coachroof window bonds for silvering or primer creep
• Sound the full deck for balsa core softness, especially around deck hardware
• Probe the bilge grid tabbing near mast step and keel stump
• Check rudder bearing play and steering system for slop
• Assess electronics, solar, battery bank, and autopilot age and condition
• For ex-charter boats, obtain engine log and service history; inspect raw-water cooling system
• Verify bow thruster (if fitted) and electric winch function
• Confirm life raft certification date and dinghy/davit condition if included in sale