Her centre cockpit sits beneath a high doghouse, while a fin-and-skeg underwater profile gives her more sailing ability than her motorsailer proportions might suggest. Period reviews credited the design with very capable sailing performance for a boat of her type.
Design and Construction
The Finnsailer 34 has a 27-foot 5-inch waterline and an 11-foot 4-inch beam. Her length-to-beam ratio of 3.00 makes her beamy without becoming barge-like.
The hull and deck are hand-laid fiberglass, with no core material. Below the waterline, she carries a lead fin keel and a skeg-hung rudder. Yachting Monthly judged her well built, and the fin-and-skeg profile gives this motorsailer unusual speed and directional control for the genre.
A ballast ratio of 35 percent and a displacement-length ratio of 279 place her firmly among loaded cruisers rather than on the racer-cruiser fringe. Her immersion rate is about 196 kg per centimetre, so she sits heavily and moves predictably as load is added.
The stainless steel fuel tank holds 200 litres. A single inboard diesel drives through a shaft.
Rig, Performance, and Handling
The Finnsailer 34 was available with more than one rig: both a masthead sloop and a ketch were factory options. This gave buyers a choice between the simplicity of a sloop and the balance of a ketch.
Her sail-area-to-displacement ratio is 11.68, a moderate figure more in keeping with a cruising motorsailer than a light-air flyer. Sheet specifications are the same for both rigs: the jib and genoa sheets are 10.5 metres long and 12 mm in diameter, the mainsheet is 26.2 metres, and the spinnaker sheet is 23.1 metres.
Under power, the calculated maximum speed is about 6.5 knots, compared with a theoretical hull speed of 7.0 knots. Sources report different capsize screening values—about 1.85 in one dataset and 1.94 in another—while the motion comfort ratio ranges from 25.3 to 26.6. Together, these figures describe a stable, reassuring platform.
Accommodation
The interior is arranged around the centre cockpit and its high, protective doghouse. A small aftercabin lies aft, with the heads amidships. The mahogany interior has three cabins and six documented berths, although Yachting Monthly gives the overall capacity as six to seven berths.
A generous galley, an outboard-facing chart table, and a fitted toilet serve the cruising layout. Fresh-water capacity is 150 litres. The sheltered cockpit and separation between sleeping areas make the Finnsailer 34 a comfortable coastal and offshore family cruiser.
Machinery, Maintenance, and Ownership
The original engine was a 36 hp Perkins 4.108, while the broader record also notes a 37 hp Perkins 4.108 M option. The shaft drive and stainless tank are durable points, but any surviving original diesel will now be decades old.
The known construction details—a solid hand-laid hull and deck, lead fin keel, and stainless tankage—describe a straightforward vintage fiberglass boat. The main areas requiring owner vigilance are typical of the period: the age and condition of the Perkins diesel, the state of the mahogany interior, and the bedding around deck hardware on a hull dating from 1978.
The mahogany gives the interior warmth, but it calls for inspection for drying and fastener corrosion. That matters on a Baltic-built boat now well into its fifth decade.
The Verdict
The Finnsailer 34 is a solid family cruiser with a genuinely capable fin-and-skeg hull beneath her substantial motorsailer volume. Groop combined a beamy, comfortable three-cabin interior with a choice of rigs, allowing buyers to favor either sloop simplicity or ketch balance.
She’s no lightweight, and her moderate sail-area-to-displacement ratio won’t make her a light-air performer. Her stability figures, sheltered cockpit, and separated accommodation are better suited to long, comfortable passages than regatta sailing.
Pros
- Fin-and-skeg underwater profile provides capable sailing performance
- Centre cockpit beneath a high doghouse, with a small aftercabin and amidships heads
- Hand-laid solid fiberglass hull and deck with a lead fin keel
- Offered with either a masthead sloop or ketch rig
Cons
- Moderate sail-area-to-displacement ratio limits light-air pace
- Any surviving original Perkins diesel is now decades old
- Mahogany interior requires upkeep appropriate to its age
