J-Boats J/28 — Information, Review, Specs

Rod Johnstone·1986 – 1988·~71 hulls·J Boats Tillotson Pearson
J-Boats J/28 drawingBuilder drawing
Hull type
Monohull · fin
Rig
Fractional Sloop
LOA
28.5' · 8.69 m
Displ.
7,900 lbs · 3,583 kg
First year
1986

The J/28 represents a significant pivot in the history of J/Boats, marking the brand's concerted move into the "performance cruiser" market during the mid1980s. Introduced in 1986, this model was designed by Rod Johnstone to provide a more refined, comfortable experience than the Spartan, racefocused J/24s and J/27s that preceded it. Built by TPI Composites using a balsacored laminate and the SCRIMP process in later iterations, the J/28 was the first JBoat specifically engineered for the cruising family who still demanded highlevel sailing characteristics. With its masthead rig and substantial lead keel, it sought to balance the brand’s racing DNA with the stability and interior volume required for coastal exploration. According to the J/Boats Official Archive, the model was intended to be a "gentleman’s" boat, offering a level of sophistication and ease of handling that allowed for shorthanded sailing without sacrificing the tactile feedback JBoats are known for.

Measurements

Dimensions 01

LOA
28.5 ft
LWL
24 ft
Beam
10 ft
Draft
5 ft
Max headroom
-
Air draft
-

Construction & hull 02

Construction
Fiberglass
Hull type
Monohull
Keel type
Fin
Rudder
1× Spade
Ballast
3000 lbs (Lead)
Displacement
7900 lbs
Water
35 gal
Fuel
20 gal

Rig & sails 03

Rig type
Fractional Sloop
P · main luff
36 ft
E · main foot
13 ft
I · fore ht.
34 ft
J · fore base
10.5 ft
Forestay (est)
35.58 ft
Sail area
412 sqft

Calculations 04

SA/D ratio
16.62
Ballast/Disp.
37.97
D/L ratio
255.12
Comfort ratio
22.43
Capsize screening
2.01
Hull speed
6.56 kn

Sailing Performance & Handling

The J/28 is defined by a "big boat" feel in a compact 28-foot frame. Unlike the fractional rigs found on many racing J-Boats, the J/28 utilizes a masthead sloop configuration. This choice provides a more powerful sail plan for cruising and allows for easier headsail trimming. With a Displacement-to-Length (D/L) ratio of approximately 255 and a Sail Area-to-Displacement (SA/D) ratio of roughly 17.5, the boat sits firmly in the "performance cruiser" category. It is heavy enough to punch through a chop with more momentum than a dedicated sportboat, yet light enough to remain responsive in light air.

On the water, the J/28 is praised for its exceptional tracking. The balanced spade rudder provides immediate feedback, but the hull's 41% ballast-to-displacement ratio ensures that the boat remains stiff and upright long after smaller boats are forced to reef. The lead keel, which draws 4.75 feet, provides a low center of gravity that contributes to a comfortable motion at sea—a trait frequently noted by owners transitioning from more "twitchy" racing designs. Handling is further simplified by the placement of all control lines, which are led aft to the cockpit, allowing a couple to manage the boat without leaving the safety of the companionway.

Interior Comfort & Variations

The interior of the J/28 was a revelation for the brand in 1986, moving away from the "tube-like" feel of earlier models to a more traditional, warm cruiser aesthetic. The layout features a standard V-berth forward, followed by a main salon with two longitudinal settees and a central drop-leaf table. A significant evolution in this model was the inclusion of a proper, enclosed head located aft to starboard, a feature often lacking in boats of this size from that era.

To port, the galley is equipped with a two-burner stove and a deep sink, while the starboard side houses an aft-facing navigation station. The "owner’s version" of the interior typically features a large double quarter-berth tucked under the cockpit sole on the port side. The use of teak bulkheads and trim throughout the cabin provides a classic maritime feel, while the molded overhead liner keeps the space bright and easy to maintain. While the J/28 did not have many structural variants, it was considered a more civilized sibling to the J/27, which shared a similar length but lacked the J/28's standing headroom and full amenities.

Known Issues & Buyer’s Checklist

Prospective buyers should focus their inspections on the core integrity and the mechanical systems typical of 1980s TPI builds. While generally robust, the following areas require specific attention:

  • Deck Core Saturation: Like many balsa-cored boats of this vintage, the J/28 can suffer from moisture intrusion around deck hardware. Special attention should be paid to the stanchion bases, chainplates, and the area surrounding the mast step. High moisture readings in these areas can indicate a need for recoring.
  • The "J-Smile": This refers to a vertical crack that can appear at the leading edge of the keel-to-hull joint. While often cosmetic, it can indicate that the keel bolts require tightening or that the sealant has failed, potentially leading to weeping into the bilge.
  • Engine Maintenance: Most J/28s were powered by the Yanmar 2GM20F diesel engine. While these are exceptionally reliable, the mixing elbow is a known wear item that can clog with carbon over time, leading to overheating or loss of power.
  • Rudder Bearings: Inspect the spade rudder for play. Over decades of use, the bushings can wear, leading to a "thumping" sensation or vibration in the tiller while under power or at high sailing speeds.

Community & Resources

The J/28 benefits from the massive global infrastructure of J/Boats owners. While it does not have the massive one-design racing fleets of the J/24, it is a staple in PHRF (Performance Handicap Racing Fleet) cruising classes. Technical support and original specifications are maintained by the manufacturer, and a dedicated community of owners often shares technical advice through the J/Boats owners' network and regional J-Boat associations.

The Verdict

The J/28 is an ideal choice for the sailor who wants the pedigree of a performance brand without the "roughing it" lifestyle of a pure racer. It remains a highly sought-after model on the used market due to its build quality and timeless lines.

Pros:

  • Exceptional stability and stiffness for a 28-foot boat.
  • High-quality interior finishes with genuine standing headroom.
  • Easily handled by a solo sailor or a small crew.
  • Strong resale value supported by the J/Boats brand reputation.

Cons:

  • The masthead rig is less "tunable" for high-performance racing than fractional alternatives.
  • Balsa-cored decks require vigilant maintenance to avoid expensive moisture issues.
  • Limited production numbers compared to other J-Boat models can make finding one in top condition a challenge.

Similar sailboats

12 comparable designs · similar LOA, displacement & rig