S2 8.6 Information, Review, Specs

Sailing Performance & Handling

The S2 8.6 is a masthead sloop characterized by its stability and predictable behavior under sail. With a displacement of approximately 8,000 pounds and a ballast-to-displacement ratio nearing 37%, it is a relatively stiff boat that carries its canvas well into the upper teens before requiring a reef. According to technical specifications often cited by the S2 Sailboat Owners association, the 8.6 features a fin keel and a balanced spade rudder, which provides a nimble feel at the helm compared to the heavier full-keel cruisers of the same era.

In terms of performance ratios, the 8.6 carries a Displacement/Length (D/L) ratio of approximately 310, placing it firmly in the "moderate-to-heavy" cruiser category. This mass contributes to a comfortable motion in a seaway, though it does result in higher wetted surface area that can hinder light-air performance. However, once the breeze fills in past 10 knots, the hull’s long waterline and generous sail area allow it to reach hull speeds effectively. Owners frequently report that the boat tracks exceptionally well on a reach, though like many IOR-influenced designs of the period, it can exhibit some weather helm if over-canvassed in heavy gusts.

Interior Comfort & Variations

The interior of the S2 8.6 was considered state-of-the-art for a 28-foot boat in the 1980s, maximizing the 9' 6" beam to create an open, airy living space. The layout typically features a standard V-berth forward followed by an enclosed head to starboard and a hanging locker to port. The main salon utilizes a traditional arrangement with settees on both sides; in some variations, the port settee converts into a double berth. The galley is located aft, usually equipped with a two-burner stove, a deep sink, and an icebox, while a dedicated navigation station sits opposite.

The use of high-quality materials is a hallmark of the Slikkers era, with extensive teak joinery and a molded fiberglass headliner that simplifies maintenance. The primary sibling to the 8.6 is the S2 8.5, which shared the same hull but featured a different deck and interior trim level. While the 8.5 was more prolific, the 8.6 offered updated aesthetics and often more refined interior cabinetry. For those seeking more speed, the S2 9.1 (a 30-foot Grand Slam series model) offered a more performance-oriented cockpit and rig, whereas the S2 8.0 served as the smaller, more trailer-friendly alternative in the lineup.

Known Issues & Buyer’s Checklist

Prospective buyers of an S2 8.6 should focus their inspections on several areas common to mid-80s production boats, as well as model-specific quirks:

• Deck Core Integrity: Like many S2 models, the 8.6 utilizes a balsa-cored deck. Moisture ingress around the stanchion bases, chainplates, and the mast step can lead to delamination. A thorough "perc" test with a phenolic hammer is essential during survey.
• The Wraparound Window: The signature smoked acrylic wraparound window is a known failure point. Over decades, the sealant can dry out, leading to leaks that damage the teak interior. Additionally, finding replacement acrylic that matches the original curve can be difficult and expensive.
• Rudder Moisture: The spade rudder is susceptible to water absorption and internal structural degradation. Check for "weeping" at the bottom of the rudder blade when the boat is hauled out.
• Engine Serviceability: Most 8.6 models were equipped with Yanmar or Universal diesel engines. While reliable, the engine compartment is compact; check the condition of the motor mounts and the exhaust riser, as these are frequently neglected due to limited access.

Community & Resources

The S2 8.6 benefits from a dedicated following among Great Lakes and East Coast sailors. The primary hub for technical data and historical documentation is the S2 Sailboat Owners group, which maintains a repository of original manuals and parts lists. While the builder now focuses on powerboats, the Tiara Yachts History page provides context on the manufacturing standards and the "S2" legacy that still informs their current build philosophy.

The Verdict

The S2 8.6 is an excellent choice for a couple or small family seeking a "step-up" cruiser that offers better build quality than many mass-market contemporaries.

Pros:

• Superior build quality and fiberglass work compared to same-era competitors.
• Stiff, stable sailing characteristics that inspire confidence in new sailors.
• Spacious interior with genuine teak finishes that have aged well.
• Excellent resale value within the niche of "classic" S2 enthusiasts.

Cons:

• Light-air performance is sluggish due to moderate weight and wetted surface.
• The large wraparound window is prone to leaking and expensive to replace.
• Balsa-cored decks require vigilant maintenance of hardware bedding.