Check the control cables at the engine. Open the throttle full not running. You have adjustable cables for forward and reverse there. Have assistance to identify the forward cable. Then adjust accordingly. Not to go past max RPM of motor. Has this vessel been recently repowered?
Over Ana’s over you lost the prime? Have you checked for leaks? They are sometimes hiding. Leaking by gravity when you sleep. Swearing someone is stealing fuel! The fuel delivery on a two stroke doesn’t care about gravity. It needs constant PSI! I install a water/fuel filter before the engine...