RedactedNarrative: Vessel was cruising south on the river,  when the vessel slowed down for the  no wake zone, the operator smelled smoke.   The operator lifted up the engine compartment  and found a good amount of grey smoke in the engine compartment ( left of the motor). The operator  maneuvered the vessel closer to a marina. As the operator approached the marina, he noticed flames coming from the engine. The engine was shut down.  The operator and passenger jumped into the water. The boat was fully engulfed in flames.  The cause of the fire was a fuel system failure. The vessel was a total loss. No injuries.