Design Brief & Intent
The Ohlson 36 Mk II was designed primarily as an offshore cruiser-racer. Einar Ohlson’s goal was to maximize speed and stability within the limits of the CCA rating system, a rule that heavily favored heavy displacement, deep draft, and elegant overhangs 3. The Mk II emerged to address the specific desires of the North American market, where brokerage firms like Campbell & Sheehan of Larchmont, New York, had successfully imported the original model. Einar Ohlson widened the hull to a beam of nine feet and eight inches to increase initial stability and carve out more usable volume below decks.
Internally, the boat reflects the legendary joinery of the Orust shipbuilders 1. Every cabinet, locker, and frame was crafted with Honduran mahogany set against laminated white oak frames 5. The fit-out is warm, traditional, and functional for offshore passage-making, featuring deep settee berths, pullman options, a secure u-shaped galley, and a dedicated navigation station. Rather than attempting to maximize berth count at the expense of comfort, the interior layout was designed to keep a crew of five or six secure and warm while underway in heavy seas. The level of craftsmanship in these wooden hulls remains a gold standard, representing the twilight of traditional wood yacht construction before fiberglass completely dominated the market.
Variations & Configurations
While the core hull shape of the Mk II remained consistent, Einar Ohlson offered configurations that allowed owners to customize the boat's primary mission. The model was built with either a masthead sloop or a yawl rig 1. The yawl configuration featured a small mizzen mast stepped aft of the rudder post, which allowed for exceptional sail-handling versatility. Short-handed crews could drop the mainsail entirely in heavy weather and sail comfortably under "jib and jigger" (mizzen and genoa), balancing the helm perfectly without putting excessive strain on the crew.
The underbody configuration of the Ohlson 36 Mk II is a classic deep draft profile. Though technical databases often classify it as a fin keel, it is practically a long-chord, deep keel with a heavily cutaway forefoot and an attached rudder. This hybrid design offered a compromise: it provided the exceptional tracking and directional stability of a full-keeled boat while reducing wetted surface area and improving turning speed compared to its straight-keeled contemporaries. Draft was typically fixed at five feet, making it deep enough to grip the water on a windward beat while remaining shallow enough to access classic coastal harbors.
Sailing Performance & Handling
Under sail, the Ohlson 36 Mk II is a powerful, sea-kindly yacht that handles rough conditions with grace. The hull shape and weight distribution yield a comfort ratio of 34.96, which translates to an exceptionally easy, gentle motion in a heavy seaway. Unlike modern light-displacement flat-bottomed boats that pound over waves, the Ohlson's deep sections and heavy displacement slice cleanly through a chop. This behavior is further illustrated by its high displacement-to-length ratio of 353.65, which marks the vessel as a true heavy-displacement thoroughbred. While this means the boat requires a solid breeze to overcome its wetted surface in light air, it also ensures that the yacht maintains excellent momentum once moving, resisting the deceleration that often plagues lighter boats in head seas.
The capsize screening ratio of 1.63 is a testament to the boat’s safety offshore. This value sits well below the maximum safety threshold of 2.0, indicating a highly stable hull shape with a low center of gravity and a strong righting moment. At the helm, the Mk II feels balanced and predictable. Thanks to the cutaway forefoot, helm pressure remains manageable even when the boat is pressed hard under a large genoa. However, she does exhibit the characteristic heel of CCA-era designs, finding her sweet spot once she shoulders into her bilge, where her waterplane area increases and her hull shape stiffens.
Known Issues & Triage
As a classic wooden vessel approaching or exceeding its sixth decade, the Ohlson 36 Mk II requires a sophisticated understanding of traditional wooden shipwrighting to maintain. The primary technical concern revolves around Einar Ohlson's specific construction technique: carvel mahogany planking over laminated oak frames, fastened with copper rivets, but crucially constructed with glued seams. This "glued seam" method creates a monocoque-like hull structure when new, but it is notoriously difficult to repair as the vessel ages. If the boat is left out of the water for long periods, the mahogany planks will shrink. Unlike traditional caulked seams that can simply swell back up or be easily re-caulked with cotton and seam compound, fractured glued joints can allow water to seep between the planks. Triage for split or failing seams often requires routing out the old glue and inserting glued wooden splines (splining), a highly labor-intensive process.
Other structural focal points include the oak frames and floor timbers. Fresh water is the enemy of any wooden boat; chronic leaks from deck hardware, chainplates, or the cabin trunk can lead to localized rot in the white oak frames. Prospective buyers must inspect the frame bays directly beneath the chainplates and the mast step. Keel bolts are another area of concern. The heavy ballast keel is secured to the wooden deadwood via metal bolts that can suffer from crevice corrosion, especially if water has penetrated the joint between the lead and the wooden keel structure.
Modernization & Upgrades
For modern owners committed to preserving these classic yachts, updating the propulsion system is usually the first major project. The original engine options—often a gasoline-powered Vire or an early Graymarine—were notoriously underpowered for a boat displacing 13,400 pounds. Today, veteran owners almost universally opt to repower with modern, lightweight diesels in the 20 to 30 horsepower range, with Beta Marine and Yanmar being the most popular choices. These engines fit into the cramped engine compartment far better, offer significantly greater reliability, and provide the necessary thrust to claw off a lee shore in heavy weather.
On deck, modern restorations often tackle the original teak-over-plywood subdecks. Decades of thermal cycling and fastener degradation frequently result in water bypassing the teak and rotting the plywood underneath. Modern owners typically strip the old teak, repair the deck beams, and lay down a new marine plywood deck sealed with epoxy and fiberglass cloth. This not only permanently solves the leak issue but also adds significant torsional rigidity to the entire hull structure. Additionally, owners are updating the electrical systems, replacing old glass-fuse panels with modern marine distribution centers, and adding low-draw LED lighting, solar arrays integrated into subtle canvas biminis, and lithium-iron-phosphate battery banks to support modern navigation electronics without overloading the boat's weight distribution.
The Verdict
The Ohlson 36 Mk II is a connoisseur’s sailing yacht. It appeals to sailors who value classic lines, historical pedigree, and a soft, sea-kindly motion over the modern interior volume of a cruising catamaran or a wide-beam production cruiser. While maintaining a classic wooden hull demands a lifetime of vigilance, expertise, and financial commitment, the reward is an exceptionally beautiful, structurally stout ocean voyager that turns heads in any harbor and stands as a monument to the golden age of Swedish yacht design 1.
Pros
- Exquisite classic aesthetics and timeless lines designed by Einar Ohlson.
- Incredible motion comfort in heavy seas with an exceptionally low capsize risk.
- High-grade Swedish joinery and premium Honduran mahogany construction 5.
- Versatile rig options with both sloop and yawl configurations 1.
- Balanced and predictable handling on all points of sail.
Cons
- Glued-seam wooden construction is highly specialized and expensive to repair.
- High demands for ongoing hull, frame, and brightwork maintenance.
- Tight interior volume and narrow beam compared to modern 36-footers.
- Original gasoline engines are underpowered and require immediate repowering.
- Prone to freshwater deck leaks that can lead to underlying frame and deck-beam rot.
