O-rings and seals are small, ring-shaped components that are used in a variety of systems and appliances on boats, including the jet pump system. They are designed to prevent the leakage of fluids, gases, or other materials and are used in a variety of applications, including sealing joints, connecting two parts together, or providing a barrier between different materials or environments.

In the jet pump system of a boat, O-rings and seals are typically used to seal the joints between different components, such as the pump housing, the impeller, and the steering nozzle. They help to prevent the leakage of water or other fluids and can also help to reduce wear and friction between moving parts.

O-rings and seals are typically made of durable materials such as rubber, silicone, or Teflon, and they are designed to withstand the high forces and stresses that are generated during operation. They are also typically designed to be easy to access and replace, as they can wear out over time due to the constant friction and wear.

To ensure the best performance and longevity of O-rings and seals in the jet pump system, it is important to follow the manufacturer's recommendations for maintenance and to use the boat in accordance with the manufacturer's guidelines. This may include regularly inspecting O-rings and seals for signs of wear or damage and replacing them if necessary.