What must intake ducting do in order to comply with regulations?

Intake ducting must extend below the carburetor air intake level to ensure that the engine receives sufficient and properly ventilated air for combustion. This positioning helps to minimize the risk of vapor lock or engine malfunction due to inadequate air supply. By extending below the carburetor air intake, the design ensures that any vapors or gases from fuel can dissipate safely, which is crucial for preventing the potential for fuel vapors igniting. This regulation is designed to enhance safety on the water and to improve overall engine performance.

Positioning the ducting correctly also plays a role in preventing water from entering the air intake, which can lead to engine damage or stalling, particularly important in marine environments. It reinforces the importance of following safety regulations in order to maintain the safety of the vessel and those on board.