Why does your Yamaha two stroke outboard engine stall when throttle is?

A Yamaha two-stroke outboard engine may stall when the throttle is applied due to several reasons, such as fuel delivery issues, air leaks, or ignition system problems. Insufficient fuel flow caused by a clogged fuel filter or a malfunctioning fuel pump can prevent the engine from getting the necessary fuel under load. Additionally, a dirty carburetor or improperly adjusted throttle can lead to poor performance. Finally, issues with the spark plug or ignition timing can also cause stalling when throttle is increased.