Harpoon 4.6 Information, Review, Specs

Boat drawing
Make
Model
Number Built
800
Production Year(s)
1977 - 1983

The Boston Whaler Harpoon 4.6 is a distinctive 15-foot monohull sailboat, a product of Boston Whaler's brief but notable venture into the sailing market. Produced between 1977 and 1983, this compact daysailer was designed by the renowned C&C Design Group, bringing a blend of performance-oriented design and Boston Whaler's legendary "unsinkable" construction ethos. Built in limited numbers, approximately 800 units, the Harpoon 4.6 served as a simple, stable, and durable option for recreational sailing enthusiasts.

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History and Design

The Harpoon 4.6's lineage traces back to 1977, when C&C Design Group penned its lines, marking Boston Whaler's foray into sailboat manufacturing. During this era, Boston Whaler, founded by Richard T. "Dick" Fisher, was celebrated for its revolutionary Unibond™ construction process, where a foam-filled fiberglass hull created exceptionally robust and unsinkable powerboats. This commitment to safety and durability extended to the Harpoon line, making the 4.6 a remarkably resilient small sailboat. While Boston Whaler was primarily known for its powerboats, the Harpoon series showcased the company's versatility, applying their core manufacturing principles to a sailing craft. There were no significant production variations like MkI or MkII reported for the Harpoon 4.6, maintaining a consistent design throughout its production run.

Sailing Performance and Handling

At just 15 feet overall with a waterline length of 13.33 feet and a hull speed of 4.89 knots, the Harpoon 4.6 is designed as a sprightly daysailer. Equipped with a fractional sloop rig and a centerboard keel, she offers flexibility for shallow water sailing with a minimum draft of 0.5 feet when the board is up, extending to a maximum draft of 3.33 feet when deployed. Owners frequently describe the Harpoon 4.6 as a "drier, heavier, and more stable" boat compared to other small craft. However, some reports indicate that the boat "doesn't point" well and can be "incredibly slow" in certain conditions. The boat's design prioritizes stiffness and stability. A recurring note among owners concerns the centerboard controls, which some have found to be problematic, with lines occasionally jumping off pulleys or being difficult to operate smoothly.

Accommodations and Layout

Given its compact 15-foot length and 6.58-foot beam, the Boston Whaler Harpoon 4.6 is an open-cockpit daysailer, meaning it does not feature enclosed accommodations or significant interior headroom. The layout is characteristic of a small dinghy or daysailer, focusing on a functional cockpit designed for sailing. This simple arrangement prioritizes ease of use and maintenance, suitable for short excursions and training rather than overnight stays.

Owner's Perspectives

Owners of the Boston Whaler Harpoon 4.6 generally appreciate its robust construction and Boston Whaler's hallmark unsinkable design. Many report that the hulls remain in "excellent shape" even after decades, with no significant cracks in the gel coat. The boat is often praised for its stable and dry ride. However, a common and significant concern raised by owners is the tendency for the open-cell foam used in its construction to absorb water over time. This can lead to a waterlogged core, making the boat considerably heavier and potentially impacting its performance. Furthermore, the original centerboard control system is frequently cited as a weakness, with reports of it being "junk" and difficult to manage, sometimes requiring two people to operate effectively. Despite these issues, the Harpoon 4.6 maintains a "cult-like following" among enthusiasts due to its durable build and unique heritage.

Measurements

Construction & Hull

Construction Material
Fiberglass (Solid)
Hull Type
Monohull Sailboat
Keel Type
Centerboard
Rudder
1x —
Ballast
-
Displacement
425 lbs
Water Capacity
-
Fuel Capacity
-

Engine

Engine Make
Engine Model
Engine Type
Engine HP
Engine Count
1
Drive Type
Fuel Type
Hover over a measurement
IJPE FS LOALWL

Rig & Sails

Rig Type
Fractional Sloop
P (Main Luff)
20 ft
E (Main Foot)
9 ft
I (Foretriangle Height)
13.9 ft
J (Foretriangle Base)
4.2 ft
Forestay Length (est)
14.52 ft
Main Sail Area
90 sqft
Foretriangle Sail Area
29.19 sqft
Total Sail Area (Reported)
129.2 sqft
Total Sail Area (Calc)
119.19 sqft

Dimensions

LOA
15 ft
LWL
13.33 ft
Beam
6.58 ft
Draft
3.33 ft
Max Headroom
-
Air Draft
-

Calculations

Hull Speed
4.89 kn
Pounds per Inch Immersion
313.4