Jeanneau Sun Fast 20 Information, Review, Specs

Sailing Performance & Handling

The Sun Fast 20 is defined by its agility. With a displacement of approximately 780 kg and a relatively generous sail area for its size, the boat is categorized as a light-displacement monohull. It utilizes a fractional sloop rig that is easy to tune and handle shorthanded. The boat’s performance characteristics are largely dictated by its centerboard configuration, which allows for a minimum draft of just 0.25 meters, enabling it to venture into shallow estuaries or be beached easily. When the board is fully extended to 1.30 meters, the boat gains significant tracking stability and upwind performance.

According to technical reviews from the period, the Sun Fast 20 feels more like a large dinghy than a traditional keelboat. It is sensitive to crew weight and trim, rewarding active sailors with surprising speed in light to moderate air. The wide hull provides a fair amount of initial stability, but because the ballast (approximately 250 kg) is housed primarily within the hull and the centerboard rather than a deep fixed keel, the boat can feel "lively" in a breeze. Owners often report that the boat performs best when kept upright; as the heel angle increases, the broad transom can begin to drag, and the rudder may lose some of its grip.

Interior Comfort & Variations

Despite its 20-foot length, the Sun Fast 20 manages to squeeze in a surprisingly functional interior, though it is best described as "compact" rather than "spacious." The layout features a classic V-berth forward and two single settee berths that extend aft under the cockpit seats. There is no standing headroom—the space is designed for sitting and sleeping only. The minimalist approach is intentional, aimed at keeping the boat light for trailering.

The sibling model, the Sun Odyssey 20, used the same fiberglass hull but often featured slightly different trim and a focus on cruising comfort rather than the "Fast" branding of its sibling. In both models, the inclusion of a chemical toilet and a small galley area (often just a space for a single-burner stove) was an option. The use of molded fiberglass liners makes the interior easy to wipe down, though it lacks the warmth of traditional woodwork found on larger Jeanneau yachts. The "open" feel of the cabin is aided by the large companionway, which, when opened, integrates the cockpit and the interior living space effectively.

Known Issues & Buyer’s Checklist

Potential buyers should focus on the specific mechanical and structural points common to trailer-sailers of this vintage.

• Centerboard Pivot and Trunk: The lifting mechanism and the pivot bolt are critical points of failure. Inspect for excessive "slop" or rattling in the board, which can indicate worn bushings or a damaged trunk. Marine forums frequently note that if the board hasn't been serviced, it can jam or cause stress cracks in the trunk.
• Rudder Hardware: The transom-hung rudder is under significant stress given the boat's beam and potential for weather helm. Check the pintles and gudgeons for signs of stress or elongation of the mounting holes.
• Deck Core Integrity: While Jeanneau’s construction is generally robust, the deck hardware (cleats, stanchion bases) should be checked for moisture ingress. Soft spots in the deck, particularly around the mast step, are high-signal indicators of core rot.
• Mast Step and Rigging: Since this boat is frequently stepped and unstepped for trailering, the mast foot and the standing rigging terminals are prone to wear and tear. Ensure the forestay and shroud tangs are not fatigued.

Community & Resources

While there is no longer a dedicated factory-supported class association for the Sun Fast 20, the model is a staple within the Jeanneau Owners Network, a high-authority independent resource that maintains technical archives and owner-contributed manuals. Because of the boat's popularity in Europe—particularly in France and Poland—technical documentation is often available through French sailing federations and regional Jeanneau clubs.

The Verdict

The Jeanneau Sun Fast 20 remains a premier choice for sailors who want the freedom of trailering without sacrificing the "big boat" feel of a renowned French shipyard. It strikes a successful balance between a sporty daysailer and a basic weekender.

Pros:

• Portability: Extremely easy to trailer and launch, significantly reducing storage costs.
• Versatility: The 0.25m minimum draft allows for "gunkholing" and beaching that fixed-keel boats cannot manage.
• Performance: Offers a responsive, engaging sailing experience that is superior to many heavier 20-foot cruisers.

Cons:

• Limited Headroom: The interior is strictly for sitting and sleeping, which may be a drawback for longer trips.
• Stability: As a light-displacement centerboarder, it can feel flighty in heavy weather compared to a fixed-keel equivalent.
• Age: Most units are now 25+ years old, requiring careful inspection of the centerboard and rigging.