RedactedNarrative: Operator stated they had just refueled at the Lakeview Marina and he said he turned on the ventilation fan and motored out to the No Wake buoys. When they got about 10ft past the buoys there was an explosion in the motor area. The operator stated the explosion blew the motor cover about 3 feet in the air.  They grabbed their PFD's and jumped into the water.  Marina personnel quickly rescued them.  V1 burnt completely.