The Joemarin 36 stands as a quintessential example of the "Koster" style double-ender, a design philosophy deeply rooted in Scandinavian maritime tradition. Designed by the legendary Swedish naval architect Arvid Laurin and constructed by Joemarin OY in Joensuu, Finland, during the late 1970s, the 36 was intended for serious offshore passage-making. At a time when the Finnish boatbuilding industry was gaining global acclaim for its high-quality fiberglass work—led by the likes of Nautor Swan and Baltic Yachts—Joemarin carved out a niche for rugged, traditional cruisers that prioritized seaworthiness over contemporary racing trends. The 36 is the larger sibling to the Joemarin 34 (also known as the Lohi 34), though it distinguishes itself with the hallmark Laurin "S-frame" hull and a more pronounced double-ended silhouette that provides exceptional buoyancy in following seas.
Joemarin 36 Information, Review, Specs
- Make
- Joemarin
- Model
- 36
- Builder
- Joemarin OY
- Designer
- Arvid Laurin
- Number Built
- Production Year(s)
- 1977 - ??
Sailing Performance & Handling
The sailing characteristics of the Joemarin 36 are defined by its Arvid Laurin heritage, emphasizing a high ballast ratio and a modified long keel. This combination provides a remarkably stable platform that excels in heavy weather. Owners often describe the boat’s motion as "deliberate" and "sea-kindly," avoiding the jerky motions common in modern, flat-bottomed designs. With a displacement that likely sits in the 6,500kg to 7,000kg range, the vessel possesses the inertia necessary to punch through a steep chop without losing significant headway.
The double-ended "Koster" stern is not merely aesthetic; it is a functional choice for blue-water cruising. In heavy following seas, the stern splits the waves rather than allowing them to slam against a wide transom, reducing the risk of being pooped and making the helm easier to manage under autopilot or wind-vane steering. However, the trade-off for this heavy-displacement, long-keeled geometry is felt in light air and tight quarters. The Joemarin 36 is not a "greyhound" of the light-air variety; it requires a decent breeze to overcome its wetted surface area. Furthermore, like many long-keeled yachts, backing into a slip can be a challenging exercise in predicting "prop walk" rather than relying on precise rudder authority.
Interior Comfort & Variations
True to its Finnish origins, the interior of the Joemarin 36 is typically finished in high-quality hardwoods, often teak or mahogany, which creates a warm, ship-shape atmosphere. The layout is a classic offshore arrangement designed to be functional at sea. It generally features a traditional V-berth forward, followed by a full-width head. The main salon utilizes the vessel’s beam effectively, often incorporating a pilot berth above the settee to maximize sleeping capacity for offshore deliveries.
The galley is usually positioned to the port side of the companionway, offering a secure "U-shape" that allows the cook to brace themselves while under heel. Opposite the galley, a dedicated navigation station serves as the command center for the yacht. While the Joemarin 36 does not offer the cavernous "condo-style" aft cabins found in modern hulls of the same length, its quarter berths are highly prized by ocean sailors as the most comfortable places to sleep while underway. No major production variations of the hull were marketed, though individual boats may vary based on whether they were commissioned with a sloop or ketch rig, though the masthead sloop remains the most common configuration.
Known Issues & Buyer’s Checklist
Prospective buyers of a Joemarin 36 should approach the vessel with an understanding of its age, focusing on the structural integrity of a 40-plus-year-old hull.
- Deck Core Integrity: Like many boats of this era, Joemarin used a sandwich construction for the decks. It is critical to inspect for soft spots, particularly around stanchion bases, chainplates, and the mast step, which may indicate water ingress into the core material.
- Osmotic Blistering: While Finnish fiberglass work was generally superior, any hull from the late 70s should be surveyed for signs of osmosis. Historical reports from Scandinavian owner circles suggest that while Joemarin hulls are robust, those kept in warmer waters may show more signs of blistering than those in the Baltic.
- Engine Service Life: Many original units were fitted with Bukh or Volvo Penta engines. Given the age, unless a repower has been documented, buyers should factor in the potential cost of a modern diesel replacement, as parts for older marine engines are becoming increasingly scarce.
- Rigging and Chainplates: The Joemarin 36 is a powerful boat that puts significant load on its rig. The internal chainplates should be inspected for crevice corrosion where they pass through the deck, a common failure point in older offshore cruisers.
Community & Resources
The Joemarin 36 enjoys a dedicated following within the broader community of Arvid Laurin enthusiasts. Technical documentation and historical context are often preserved by the Laurinkoster Association, which focuses on the "Koster" type boats designed by Laurin. Additionally, because of the brand's Finnish roots, much of the specific technical dialogue occurs within Finnish classic boat forums; however, English-speaking owners frequently congregate on broader platforms like CruisersForum to discuss the nuances of the Joemarin's offshore capabilities.
The Verdict
The Joemarin 36 is a "sailor's sailboat," built for those who prioritize safety and the ability to weather a gale over interior volume and marina-friendly maneuvers. It is a testament to the era of Finnish boatbuilding where longevity was a standard requirement, not an optional extra.
Pros:
- Exceptional seaworthiness and stability in heavy weather.
- High-quality Finnish craftsmanship and joinery.
- The "Koster" stern provides superior handling in following seas.
- Designed by the renowned Arvid Laurin for genuine offshore use.
Cons:
- Sluggish performance in light winds (under 10 knots).
- Difficult to maneuver in reverse due to long-keel characteristics.
- Interior may feel cramped compared to modern 36-foot production yachts.
- Maintenance requirements associated with a vintage GRP hull.
Measurements
Construction & Hull
- Construction Material
- Fiberglass
- Hull Type
- Monohull Sailboat
- Keel Type
- Fin
- Rudder
- 1x —
- Ballast
- 4100 lbs
- Displacement
- 8157 lbs
- Water Capacity
- -
- Fuel Capacity
- -
Dimensions
- Length Overall (LOA)
- 35.83 ft
- Waterline Length (LWL)
- 28.6 ft
- Beam
- 8.16 ft
- Draft
- 4.92 ft
- Max Headroom
- -
- Air Draft
- -
Rig & Sails
- Rig Type
- Fractional Sloop
- P (Main Luff)
- -
- E (Main Foot)
- -
- I (Foretriangle Height)
- -
- J (Foretriangle Base)
- -
- Forestay Length (est)
- -
- Sail Area
- 420 sqft
Calculations
- Sail Area / Displacement (SA/D) Ratio
- 16.58
- Ballast / Displacement Ratio
- 50.26
- Displacement / Length Ratio (D/L) Ratio
- 155.66
- Comfort Ratio
- 25
- Capsize Screening Formula
- 1.62
- Hull Speed
- 7.17 kn