Design and Construction
The Mercury has always been a study in restrained versatility. Sparkman & Stephens laid her out so the centerboard model, by virtue of her hull shape and tall topsides, carries more of a keel-boat feel than most board boats of her size anchor, while the fixed-keel version trades the trunk for added stability and more cockpit space anchor. Early boats were wooden, but Cape Cod Shipbuilding moved the class to fiberglass in 1948 and has built them that way since anchor. Both versions seat sailors above air tanks formed by the seats themselves, a detail that keeps the boat afloat even with the cockpit full of water anchor. The fixed-keel model weighs 730 pounds with 300 pounds of iron ballast, against the centerboard model's 470 pounds, and the keel boat's 3 foot 3 inch draft contrasts with the board boat's 6 inches up and 3 foot 10 inches down.
Rig and Handling
The standard rig is a fractional sloop with aluminum spars and a roller-reefing boom, carrying 119 square feet of sail on standing and running rigging that comes with the boat anchor. A swivel cam cleat for the mainsheet sits on the aft deck, and a vinyl rubrail finishes the rail. On the water the Mercury glides through easily anchor, and the cockpit is planned for five yet can be handled by two. The centerboard model launches and rigs at a ramp with the optional trailer; the keel model does the same but needs more depth to float clear anchor. Her modest wetted surface makes her a calm-water trainer that many programs use for novices and seasoned sailors alike anchor.
Accommodations
There is no cabin to speak of; the Mercury is an open daysailer whose "accommodation" is cockpit geometry. Five can sit, two can sail, and the fixed-keel version's trunkless floor gives those aboard more room than the centerboard layout allows anchor. For a boat of this length the 5 foot 5 inch beam and high topsides create a secure, sociable cockpit rather than a cramped racing tub.
Ownership and Refits
Production has run continuously from the wooden originals through the 1948 fiberglass change and into the present, with Sparkman & Stephens still collecting the two-dollar-per-boat royalty set in 1940 anchor. Standard equipment has long included anti-fouling bottom paint, so a used boat's hull upkeep begins from a protected baseline. The optional trailer makes the 470- or 730-pound hull a manageable backyard asset.
The Verdict
The Mercury 15 FK is a rare thing: a child's trainer that never outgrew its usefulness, built in one yard's care for over eight decades. The fixed-keel model is the more settled daysailer; the centerboard model the more portable adventurer.
Pros
- Fixed-keel variant adds stability and trunkless cockpit space anchor
- Seat-built air tanks keep her afloat with a flooded cockpit anchor
- Continuous production since 1939 with consistent builder support anchor
Cons
- Keel model needs deeper water to launch from a trailer anchor
- At 15 feet, limited to sheltered-water sailing and small crews
