Donzi Sweet 16, the Little Deep-V That Started a Legend

The Donzi Sweet 16 and Aronow's 18-month company

Don Aronow started Donzi Marine in 1964, between his Formula Marine venture of 1962 and the Magnum Marine and Cigarette companies that came later. He sold Donzi to Teleflex in mid-1965, so his personal ownership lasted barely more than a year. Yet the boat that launched the company, the 16-foot runabout that owners quickly nicknamed the Donzi Sweet 16, outlived his tenure by decades and became one of the most recognized small boats in American history.

The hull was drawn by the Jim Wynne and Walt Walters design team that worked with Aronow on his early boats. Their goal was to shrink the deep-V principles proven in offshore racing into a boat small enough for one person to trailer, launch and drive, and still powerful enough to feel like a race boat. The result was a tiny, aggressive hull with a sharp entry, lifting strakes and a V8 engine.

Donzi is still building boats today under Iconic Marine Group, with a range that includes the 22 Classic, the 38 ZRC and larger luxury sport models, and the company traces its heritage directly back to 1964 and the 16.

Offshore racing ideas in a 16-foot package

A deep-V hull on a 16-foot boat was a radical idea in the mid 1960s, when most small runabouts had flat or modified-V bottoms. The Sweet 16's deep V lets it cut through chop at speed instead of slamming, which is why owners often describe it as riding like a much bigger boat. Lifting strakes add grip and lift, helping the boat get on plane quickly and stay stable at speed. Donzi's own specification for the 16 Classic lists 16 feet 5 inches overall, a 6 foot 11 inch beam, 24 degrees of deadrise and a hull weight of about 2,400 to 2,500 pounds, with 30 to 32 gallons of fuel depending on the year.

The trade-off is stability at rest. A narrow, deep-V boat rolls more at anchor or when people move around, and the cockpit is small. It is a boat for running, not for lounging.

• Deep-V hull adapted from offshore racing designs
• Lifting strakes for grip and quick planing
• V8 sterndrive power on most boats
• Compact enough to trailer behind a car or small truck

A V8 in a 16-foot boat

Most Sweet 16s were built with a single V8 engine driving a sterndrive. Engine makes and sizes varied over the years and between dealers, and many boats have since been repowered, so the engine in a particular boat may not match its original build. Always check the engine and drive serial numbers and ask for documentation.

A well-sorted Sweet 16 with a healthy small-block V8 runs in the 40s to 50s mph, and modified boats can go faster. These are estimates from the classic boat community rather than factory figures. At those speeds a 16-foot boat feels very fast, and the deep-V gives it the composure to handle it.

Fuel consumption at cruise is modest by performance boat standards, roughly 8 to 12 gallons per hour depending on engine and speed, which makes the Sweet 16 one of the most affordable ways to own a genuine performance boat.

The later 16 Classic

Donzi revived the design as the 16 Classic, keeping the shape that made the original famous while updating construction, hardware and power to more modern standards. The 1999 brochure rated it for up to 220 hp, while the 2013 version came with a 260 hp MerCruiser 5.0 MPI Alpha sterndrive, and in 2014 Donzi offered the Sweet 16 in a 50th-Anniversary Classic Series. These boats are easier to own than 1960s originals, with more reliable engines and fewer restoration concerns, and they are often a smarter choice for buyers who want to use the boat rather than show it.

Collectors still prefer original 1960s boats, but the 16 Classic offers much of the same driving experience at lower prices and with less risk.

Restoring a Sweet 16 without regrets

Many Sweet 16s on the market are project boats. The most common issues are rotten wooden stringers and transoms, soft floors, tired wiring and worn sterndrives. Fiberglass boats of this age typically used wood for structural reinforcement, and water intrusion over decades causes rot.

A full restoration with new stringers, transom, engine and drive can cost more than the finished boat is worth, so buyers should budget carefully. The best approach for most people is to pay more for a boat that has already been properly restored, with photos and receipts documenting the work.

Owning a Sweet 16 today

Annual running costs are low by boat standards, typically $3,000 to $9,000 for storage, insurance, maintenance and fuel. The boat is easily trailered and stored in a garage, which saves slip fees.

Parts for common V8 engines and sterndrives are widely available, while original Donzi hardware, windshields and trim can be harder to find. An active community of Donzi owners and clubs shares parts sources, restoration advice and events.

The Donzi Sweet 16 outboard question

Searches for a Donzi Sweet 16 outboard are common. The boat was designed around inboard V8 sterndrive power, but some owners have converted boats to outboard power to save weight, simplify maintenance and free up interior space. Outboard conversions can work well if done properly, with a reinforced transom and careful balance, but they reduce collector value.

If originality matters to you, stick with an inboard boat. If you want a reliable, low-maintenance runabout, a well-executed outboard conversion can make sense, but have the transom surveyed carefully.

Collector values and what drives them

Sweet 16 prices have climbed as collectors seek out original 1960s boats. Documented history, original hardware, correct colors and a professional restoration bring the highest prices. Boats with notable ownership history or racing pedigree can bring more.

Later boats and modified examples are more affordable and often better for daily use. Either way, the Sweet 16's iconic status helps support values.