Mottle 33 Information, Review, Specs

Mottle 33 Drawing
Make
Mottle
Model
33
Builder
George Mottle (AUSTRALIA)
Designer
Joe Adams
Number Built
125
Production Year(s)
1975 - ??

The Mottle 33 is a seminal example of Australian production boatbuilding, emerging from the design office of the legendary Joe Adams. Produced primarily during the late 1970s and 1980s by Mottle Yachts in New South Wales, the vessel was conceived as a robust, sea-kindly coastal cruiser that could double as a capable offshore voyager. It is the production-built sibling of the Adams 33, sharing the same performance-oriented hull lines that Joe Adams became famous for, characterized by a fine entry and a clean run aft. While many 33-footers of its era prioritized interior volume at the expense of sailing characteristics, the Mottle 33 was built for those who prioritize a balanced helm and the ability to maintain momentum in light air.

Sailing Performance & Handling

The sailing pedigree of the Mottle 33 is rooted in Joe Adams' philosophy of "speed with safety." The boat features a moderate-displacement hull with a fin keel and a skeg-hung rudder, a configuration that offers a high degree of directional stability. Owners frequently report that the vessel tracks exceptionally well, requiring minimal effort on the helm even when pressed.

The sail area-to-displacement ratio suggests a boat that is relatively "stiff," standing up well to its canvas in a breeze, yet the fine entry allows it to punch through the short, steep chop often found in Australian coastal waters. According to historical design notes from Joe Adams Yacht Design, the hull was optimized to minimize drag, which translates to a boat that feels surprisingly lively for a center-cockpit cruiser. While the center-cockpit layout places the helm higher than a traditional aft-cockpit design, the Mottle 33 maintains a low center of gravity, which prevents the "pendulum" feel sometimes associated with smaller center-cockpit boats.

Interior Comfort & Variations

The Mottle 33 is most commonly recognized by its center-cockpit configuration, a layout that provides a distinct separation between the main living area and the aft sleeping quarters. The interior is typically finished in Australian timbers, such as Tasmanian Oak or Teak, reflecting the regional craftsmanship of the era. The main saloon features a traditional layout with a galley to one side and a navigation station to the other, leading into a V-berth forward.

The standout feature is the aft cabin. In many hulls, this is accessed via the cockpit, though some "walk-through" variations were produced, albeit with restricted headroom in the passage. This separation makes the Mottle 33 a favorite for families or couples cruising with guests, as it offers a level of privacy rarely found in vessels under 35 feet. A sibling model, the Mottle 820, was also produced for those seeking a smaller footprint, while the Adams 33 (the Mottle's custom-built predecessor) can often be found in steel or wood, though the Mottle 33 remains the definitive fiberglass production version.

Known Issues & Buyer’s Checklist

Prospective buyers should approach the Mottle 33 with an awareness of its age and the specific construction techniques of the 1980s.

  1. Osmosis: Like many Australian-built boats from this period, Mottle 33s are known to be susceptible to osmotic blistering in the gelcoat. A thorough hull survey is essential to determine if the vessel has undergone a professional epoxy treatment.
  2. Chainplate Leakage: The chainplates are bolted through the deck, and over decades, the sealant can fail. Persistent leaks in these areas can lead to water ingress into the plywood bulkheads, causing structural rot that is expensive to remediate.
  3. Engine Access and Age: Many original units were fitted with Bukh or early Yanmar diesel engines. While reliable, these units may be reaching the end of their service life. Due to the center-cockpit configuration, engine access is generally good via removable panels, but the condition of the sail drive (if fitted) or the shaft seal should be a primary inspection point.
  4. Rudder Bearings: The skeg-hung rudder is a robust design, but the lower bronze or composite bearings can wear over time, leading to "play" or vibration in the steering system.

Community & Resources

The Mottle 33 enjoys a dedicated following within the Australian sailing community. Technical support and historical data are primarily preserved through the Adams Yacht Registry and various regional sailing associations in Sydney and Queensland. Owners often share maintenance tips regarding the Joe Adams-designed rigs and hull repairs through these informal but highly knowledgeable networks.

The Verdict

The Mottle 33 remains a premier choice for sailors seeking a proven, Australian-built cruiser that refuses to compromise on sailing performance. Its center-cockpit layout provides a level of luxury and privacy that is difficult to match in the 33-foot category.

Pros:

  • Excellent directional stability and tracking thanks to the Joe Adams hull design.
  • Unique center-cockpit layout provides a private aft cabin.
  • Overbuilt, robust construction suitable for coastal and occasional offshore work.
  • A lively performer in light to moderate winds compared to heavy-displacement cruisers.

Cons:

  • Susceptibility to osmosis requires careful pre-purchase hull inspection.
  • Aged interior woodwork and systems may require significant cosmetic and functional updates.
  • The center-cockpit design can lead to a "dry" but somewhat exposed steering position in heavy weather.

Measurements

Construction & Hull

Construction Material
Fiberglass
Hull Type
Monohull Sailboat
Keel Type
Fin
Rudder
1x Spade
Ballast
- (Lead)
Displacement
9200 lbs
Water Capacity
90 gal
Fuel Capacity
25 gal

Dimensions

Length Overall (LOA)
32.79 ft
Waterline Length (LWL)
30.16 ft
Beam
10.75 ft
Draft
5.2 ft
Max Headroom
-
Air Draft
-
Hover over a measurement
IJPE FS LOALWL

Rig & Sails

Rig Type
Masthead Sloop
P (Main Luff)
-
E (Main Foot)
-
I (Foretriangle Height)
-
J (Foretriangle Base)
-
Forestay Length (est)
-
Sail Area
473 sqft

Calculations

Sail Area / Displacement (SA/D) Ratio
17.23
Ballast / Displacement Ratio
Displacement / Length Ratio (D/L) Ratio
149.71
Comfort Ratio
19.43
Capsize Screening Formula
2.05
Hull Speed
7.36 kn