The History of Jet Boats: A River Shed in New Zealand to Family Runabouts

The history of jet boats is a story of a problem no propeller could solve: how do you run a fast boat up a shallow, rock-strewn river without smashing the running gear on the first boulder? The answer — suck the river in through the hull and spit it out the back — took a New Zealand sheep-station engineer, a white-water expedition through the Grand Canyon and a detour through personal watercraft to become the family jet boat you can shop among our available jet boats today.

Before the Jet Boat: Early Waterjet Experiments

Standard histories of the jetboat record that James Rumsey demonstrated a steam-pump waterjet boat on the Potomac at Shepherdstown, in present-day West Virginia, on 3 December 1787. The experiments never stopped: Italy's Secondo Campini ran a jet boat in the 1930s, and in America the Hanley Hydrojet was enough of a going concern to appear in Popular Mechanics, where a reader in New Zealand would eventually find it.

None of these machines became a product boaters could buy: the pumps were inefficient at speed and the outlets dragged. What the experimenters established is that the principle was old and published long before the 1950s. What was missing was a jet unit efficient enough to push a light, planing hull fast, in water too shallow for any propeller. That piece was built, improbably, on a high-country sheep station.

William Hamilton and the Hamilton Jet: 1950s New Zealand

Charles William Feilden "Bill" Hamilton ran Irishman Creek station in New Zealand's Mackenzie Country, where the rivers are braided, shallow and fast — and a propeller was a liability. HamiltonJet's own company history records that his first jetboat was a 3.6 m (12 ft) plywood hull powered by a 100E Ford engine driving a centrifugal-pump jet, tested on the Irishman Creek dam and water race. In early 1954 it travelled up the Waitaki River — in the company's words, "successfully, if somewhat slowly." The decisive insight followed: discharging the jet stream above the waterline removed the drag of submerged outlets and made the boat steer properly. Later development brought multi-stage axial-flow units, and the Hamilton jet became a product.

Hamilton's biographer at Te Ara — the Encyclopedia of New Zealand is careful about the credit, and so is this history. "He never claimed to have invented the jet-boat," the biography states; "the water-jet principle was not new and had already been applied with some success to low-speed displacement craft overseas. Hamilton's achievement was in designing a jet unit that would propel a planing hull efficiently at high speeds." Hamilton put it more colourfully: "I do not claim to have invented marine jet propulsion. The honour belongs to a gentleman named Archimedes, who lived some years ago." The engineering team mattered too: per the NZ Maritime Museum, the production Quinnat unit was designed by engineer George Davison, hired in 1954, and Davison's 1957 Chinook unit swapped the centrifugal pump for the two-stage axial design that defined the breed. Accounts that crown Hamilton "inventor of the jet boat" go further than the man or his company ever did.

Jet Boats Conquer White Water: Upriver Running and the Colorado

A shallow-draft jet is only a claim until somebody runs it somewhere impossible. In 1960 Jon Hamilton — Bill's son — led the expedition that supplied the proof: the first successful upstream run of the Colorado River through the Grand Canyon. The 50th-anniversary account of the trip records a campaign from 3 May to 12 July 1960 with four 18-foot boats, each powered by a 185 hp V-8 driving twin jets. One boat sank in Grapevine Rapid; the other three reached Lee's Ferry on 12 July. Earlier attempts — Aleson, Sanderson, Hudson, Marston and a 1959 Bill Cooper team — had all failed at Mile 217 Rapid or Lava Falls, which makes the 1960 run the founding demonstration of the type, as Rivers and Oceans' retelling lays out.

The Colorado run fixed the jet boat's identity for a generation: the boat that goes up the river nobody else can run. Commercial white-water operations followed, and the Hamilton unit spread into workboats and pleasure craft worldwide — HamiltonJet's own history notes the company grew from that station workshop into a global marine-jet manufacturer. The river was the proving ground that made everything after it plausible.

The Personal Watercraft Detour: The Jet Ski Changes the Market

The next chapter arrived wearing a different name. In the 1960s Clayton Jacobson II, an American motocross enthusiast, developed a self-propelled water vehicle to ride like a motorcycle. His first licence went to Bombardier, whose sit-down Sea-Doo was produced from 1968 to 1970; Kawasaki then introduced the first production stand-up — the Jet Ski — in 1973. Jacobson's primacy was litigated as well as marketed: as Watercraft Zone's reporting on Jacobson records, a jury later upheld his libel claim against Kawasaki's claims to have invented the craft; Jacobson subsequently worked with Yamaha on the first WaveRunner in 1985.

The detour mattered because it industrialised the small jet pump. Personal watercraft sold in volumes no river boat ever approached — see the modern descendants among our personal watercraft listings — and their compact engines and axial pumps became a parts bin any boatbuilder could raid. When the family jet boat arrived in the 1990s, it arrived because PWC drivetrains were cheap and proven.

The Family Jet Boat Era: Yamaha and Sea-Doo, 1990s–2000s

Sea-Doo moved first into full-size boats: its Speedster debuted in 1994 (an Explorer rigid-inflatable preceded it in 1993), packaging twin Rotax PWC power — roughly 160 hp combined — into a small, playful runabout. Yamaha followed with its first jet boat, the Exciter, released in 1995 and likewise built around twin engines adapted from its WaveRunner line.

Through the late 1990s and 2000s the segment grew from novelty runabouts into a full model range: bigger hulls, proper seating, swim platforms wrapped around the jet intakes, supercharged variants. Yamaha stayed in and expanded until jet boats were a mainstream alternative to the sterndrive bowrider, while Sea-Doo eventually exited full-size boats to concentrate on watercraft. The river tool had become the family boat — with the shallow-water party trick intact, which is why buyers still cross-shop them against the prop-driven runabouts covered in our history of speedboats.

Jet Sprint Racing: The Sport the River Jet Built

New Zealand, characteristically, turned the river boat into a sport. Organised jetsprinting originated there in 1981, founded by Pat and Margaret Quinn: two-person crews race supercharged jet boats through a maze of channels in under a metre of water, against the clock, with a navigator calling the course. Per Te Ara's account of powered water sports, world championships under the UIM have rotated between New Zealand, Australia and the USA since 1988. It is the purest expression of what the Hamilton jet made possible — acceleration and grip in water too shallow to float most boats at rest.

What the History of Jet Boats Means for Buyers Today

Read as a buyer's brief, the history explains the modern jet boat's trade-offs exactly. The Hamilton formula — axial pump, discharge above the waterline, nothing below the hull — is why a jet boat can run in a foot of water and why swimmers at the stern face no exposed propeller; it is also why jets are thirstier at cruise than a comparable prop drive and ingest ropes, weeds and gravel with enthusiasm. The PWC heritage is why parts and service knowledge are everywhere, and why models built on long-running WaveRunner or Rotax drivetrains are the safest used buys.

Start with our roundup of the best jet boat brands and the jet boat buying guide, then browse every boat for sale to compare jets against the alternatives.

History of Jet Boats FAQs

Who invented the jet boat?

Nobody credible claims a single inventor — including the man usually credited. Waterjet propulsion was demonstrated by Rumsey in 1787 and developed by others, including Campini and Hanley, before Hamilton built his practical river jet in 1950s New Zealand. Te Ara's biography is explicit that Hamilton never claimed the invention; his achievement was the efficient planing-hull unit, with George Davison engineering the production design.

Why do jet boats work in shallow water?

Because there is nothing below the hull to hit. A jet draws water through a flush intake grate and discharges it through a nozzle, so draft is simply the hull's draft. The trade-off is that the intake will happily ingest ropes, weeds and gravel in that same shallow water.

When did Yamaha and Sea-Doo start building jet boats?

Sea-Doo's Speedster debuted in 1994 as the brand's first full-size jet boat, and Yamaha released its first jet boat, the Exciter, in 1995. Both were built around twin engines adapted from their personal watercraft lines.

What is jet sprint racing?

A New Zealand-born time-trial sport, organised from 1981, in which a driver and navigator race a supercharged jet boat through a channel course in under a metre of water. World championships have run under the UIM since 1988, rotating between New Zealand, Australia and the USA.

Bottom line: The history of jet boats runs from a 1787 steam experiment through a New Zealand station workshop to the Grand Canyon and the PWC boom — and every modern jet boat still trades on Hamilton's formula of shallow draft and no exposed propeller. Start your search with the available jet boats at Boat Deals Direct.