Jet ski

A Jet Ski is a small boat.

Some models let one to three people ride at once. They can look like a bike or a motorcycle.

A company called Kawasaki made the first one. It came out in 1972. It was a stand-up boat.

Some boats have a special pump inside. This pump helps the boat move through the water. Some boats even have a quiet exhaust.

People use these boats for racing and play. They are very exciting to ride!

A Jet Ski is a brand of personal watercraft. People often use this name for any small water boat.

Kawasaki is a company from Japan. They made the first successful stand-up model in 1972.

Early models were called the WSAA and WSAB. They had a special part called an impeller. This is a pump that stays inside a case. It helps the boat move safely. Some models could even circle back to the rider. This helped if a person fell off.

In 1986, Kawasaki made the X2. This was their first sit-down model. It looked like a motorcycle. This model helped start a new racing group called the Sport Class.

Later models changed a lot. The JS550 had a quiet exhaust. This was an underwater pipe for engine gases. In 2003, the SX-R 800 used a strong engine. It also had a hull made of reinforced plastic. This material makes the boat very tough. New models now use different types of engines to follow laws.

A Jet Ski is a brand of personal watercraft made by Kawasaki. This company is from Japan. Many people use the name for any small water vehicle. They also use the name as a verb. This means they say "jet skiing" to describe the activity. Some models are runabout-style. These carry one to three people. The riders sit in a way that looks like a bicycle or a motorcycle.

These watercraft work using a special pump system. The early models used a part called an impeller. This is a pump that is fully enclosed for safety. This design helps the craft stay upright. It can also help the craft circle back to the rider. If a rider falls off, the craft can circle back while idling. This lets the person swim back to the boat.

Kawasaki released the first stand-up model in October 1972. This model was the JS400. It was the first successful personal watercraft in America. Before settling on the name Jet Ski, Kawasaki called them "Water Jet" or "Power Skis." The company also helped start the United States Jet Ski Boating Association. In 1982, this group changed its name to the International Jet Sports Boating Association.

Many different models were made over the years. The JS440 was a popular model from the 1970s. In 1982, the JS550 arrived with a 531cc engine. It had a new pump and an underwater exhaust for quiet use. The JS300 came in 1986 with a 294cc engine. In 1987, the JS650SX used a 635cc twin engine. By 2003, the SX-R 800 had a 781cc engine and 80hp.

These machines are part of a large world of water sports. You might know other activities like surfing or wakeboarding. Some people even use a flyboard to move over water. Other companies like Yamaha also make watercraft. Yamaha introduced the Super Jet in 1990. There are also different types of engines used today. Some use two-stroke engines while newer ones use four-stroke engines. These changes help the boats follow environmental laws.

A Jet Ski is a specific brand of personal watercraft (PWC) manufactured by the Japanese company Kawasaki. While it is a registered trademark, the term is often used generically to describe any type of personal watercraft used for recreation. People even use the term as a verb to describe the act of riding these machines. There are different styles of these craft available for riders. A runabout-style PWC typically carries one to three people. These riders sit in a configuration similar to a typical bicycle or a motorcycle.

The mechanics of these watercraft rely on specialized propulsion systems. Early Kawasaki models featured a fully enclosed impeller, which is a rotating component used to move water. This enclosed design was created for safety and provided self-righting and self-circling features. If a rider fell off while the craft was idling, the self-circling design allowed the craft to circle back. This allowed the rider to swim back to the machine.

Kawasaki's history with these machines began with the stand-up prototype. The company released the first production stand-up PWC in October 1972. This model was known as the JS400. It was the first commercially successful personal watercraft in America. Before the company settled on the name Jet Ski, they referred to them as "Water Jet" or "Power Skis." Kawasaki also helped create the United States Jet Ski Boating Association (USJSBA). This organization later changed its name to the International Jet Sports Boating Association (IJSBA) in 1982.

Engine technology and pump designs evolved significantly through different model eras. In 1972, the WSAA and WSAB models used modified 400cc 2-stroke twin-cylinder engines. The WSAA used a flat hull, while the WSAB used a convex v-hull. By 1982, the JS550 was introduced with a 531cc engine and a high-capacity mixed-flow pump. This model included an automatic rev limiter to prevent engine damage caused by pump cavitation. The JS550 also featured an underwater exhaust to allow for quieter operation.

As the decades progressed, Kawasaki introduced more powerful and diverse models. In 1986, the company released the JS300, which featured a 294cc single-cylinder two-stroke engine with automatic oil injection. That same year, they introduced the 650 X2. This was their first sit-down Jet Ski and it started the "Sport Class" in PWC racing. In 1987, the JS650SX arrived with a 635cc two-stroke twin engine and a high-capacity axial flow pump. By 1992, the JS750-A offered a 743cc two-stroke engine with reed valves and a lighter, more maneuverable hull.

Later developments focused on increasing displacement and changing materials. In 2003, the SX-R 800 was introduced with a 781cc in-line twin 2-stroke engine. This engine generated 80hp for the craft. The SX-R 800 also utilized a hull and top deck made of fiberglass-reinforced plastic (FRP). In 2011, Kawasaki discontinued the JS800 SX-R due to US EPA restrictions on two-stroke engines. However, Kawasaki reintroduced the stand-up Jet Ski on October 6, 2016. The new SX-R 1500 used an inline 4-cylinder four-stroke engine, which shared little with its earlier predecessors.

The personal watercraft market includes many other manufacturers and related activities. For example, Yamaha introduced the Super Jet in 1990 after consulting with inventor Clayton Jacobson II. Other companies like Polaris and Bombardier have also produced various watercraft models. The world of water sports is quite broad and connects to many different activities. These include surfing, wakeboarding, and kiteboarding. Some enthusiasts even use a flyboard to move over the water. This entire industry represents a complex system of engineering, regulation, and recreation.