Gulfstar 43 Mark II Information, Review, Specs

Sailing Performance & Handling

The sailing dynamics of the Gulfstar 43 Mark II are defined by its moderate-to-heavy displacement and its split rig. While the original 43 hull was often criticized for being "tender" due to a shallow draft and high windage, the Mark II addressed these issues with a redesigned keel and a more balanced sail plan. As a ketch, the boat excels on a reach, where the mizzen sail helps balance the helm and provides additional drive in light-to-moderate air. However, with a Displacement-to-Length (D/L) ratio typically hovering in the heavy cruiser range, the Mark II requires a stiff breeze to truly find its stride.

In editorial assessments, such as those historically archived by Practical Sailor, the vessel is noted for its predictable motion in a seaway, a trait attributed to its substantial mass and fullish-finned keel. While it lacks the pointing ability of a modern fin-keel sloop, the skeg-hung rudder provides reliable tracking and a sense of security when running downwind. Owners often report that the boat feels "stiff" and safe, making it a preferred choice for coastal cruising in the Caribbean or the Bahamas, where the relatively shallow draft (approximately 5' 6") allows access to secluded anchorages that deeper draft yachts must avoid.

Interior Comfort & Variations

The interior of the Gulfstar 43 Mark II is where the model truly distinguished itself from its contemporaries. Utilizing the expansive beam and the center-cockpit layout, Lazzara designed a "great room" atmosphere that was revolutionary for the 1970s. The Mark II typically features a large walk-through galley that connects the main salon to the master aft cabin. This aft cabin is often cited as the boat's best feature, offering a queen-sized berth and a private head, providing a level of privacy rarely found in 40-footers of that era.

The main salon is characterized by high headroom—often exceeding 6' 4"—and large windows that bathe the space in natural light, a departure from the "cave-like" interiors of traditional narrow-beamed cruisers. Variations of the 43-foot hull were numerous; while the Mark II was the refined ketch, the same hull form was used for the Gulfstar 43 MS (Motor Sailer), which featured a more substantial pilothouse and a smaller rig. Another sibling, the Gulfstar 44, eventually evolved from this same lineage, offering a slightly stretched transom and updated styling. Materials inside the Mark II typically consist of teak veneers and solid teak trim, though buyers should note that Gulfstar’s early "production-line" approach occasionally resulted in varied woodwork quality depending on the specific build year.

Known Issues & Buyer’s Checklist

Prospective buyers of a Gulfstar 43 Mark II must approach the survey process with an understanding of the construction techniques used by Gulfstar in the 1970s.

1. Osmotic Blistering: Gulfstar is well-known among surveyors for hulls prone to osmotic blistering. The Mark II is no exception; it is common to find "Gulfstar bumps" in the gelcoat. While often cosmetic, a haul-out and moisture meter test are essential to determine the extent of the saturation.
2. Deck Core Integrity: The decks are balsa-cored, and like many boats of this age, leaks around stanchion bases, chainplates, and the large salon windows can lead to localized core rot. "Soft spots" are a frequent find during inspections.
3. Fuel and Water Tanks: The original iron fuel tanks are a primary concern. Over decades, condensation can cause internal rust, leading to leaks that are notoriously difficult to repair because the tanks were often glassed into the hull or placed under the cabin sole.
4. Chainplates and Rigging: Given the age of these vessels, the stainless steel chainplates—particularly where they pass through the deck—should be pulled and inspected for crevice corrosion.
5. Chain Drive Steering: Many Mark IIs utilized a chain-and-cable steering system that requires regular lubrication and tensioning. Slack in the steering or "grinding" sensations often indicate worn sheaves or rusted cables.

Community & Resources

Owners and enthusiasts of this model are served by the Gulfstar Owners Club, an informal but highly active network of sailors who share technical manuals and refit advice. While no longer a factory-supported brand, the Gulfstar 43 Mark II maintains a presence on technical forums where sailors discuss specific modifications, such as converting the original Perkins 4-236 or 6-354 diesel engines or upgrading the electrical systems to modern standards.

The Verdict

The Gulfstar 43 Mark II is a classic "value-per-foot" cruiser that offers an extraordinary amount of living space for a relatively modest investment. While it is not a high-performance greyhound, its stable motion and legendary aft cabin make it an ideal platform for a couple looking to live aboard or cruise the islands.

Pros:

• Exceptional interior volume and headroom for a 43-foot yacht.
• The private aft master stateroom is a standout feature in this size range.
• Predictable, heavy-weather handling characteristics.
• Relatively shallow draft is perfect for the Bahamas and Florida Keys.

Cons:

• Prone to osmotic blistering and deck core moisture issues.
• Performance in light air and upwind is mediocre.
• Original iron fuel tanks are a high-risk maintenance item.
• Aged systems typically require a significant refit budget.