What would cause a waverunner to die after 3 minutes of running?

A waverunner may die after running for three minutes due to several potential issues, including fuel starvation, where the engine isn't receiving enough fuel; overheating, which can occur from insufficient coolant or blocked water intake; or electrical problems, such as a failing battery or faulty ignition system. Additionally, a clogged or damaged exhaust system could lead to performance issues and engine shutdown. Regular maintenance and checks can help prevent these problems.