RedactedNarrative: ON JUNE, 29 2019 AT APPROXIMATELY 4:25P.M., UNIT 1 WAS LAUNCHING  AT THE JIM ARDUINI BOAT LAUNCH IN ROCK FALLS ON THE ROCK RIVER. ONCE UNIT 1 WAS BACKED INTO THE WATER, THE OPERATOR ATTEMPTED TO START THE BOAT, CAUSING AN EXPLOSION TO OCCUR INSIDE THE ENGINE COMPARTMENT. THE OPERATOR ATTEMPTED TO PUT THE FIRE OUT, BUT IT HAD PROGRESSED BEYOND THE USE OF A FIRE EXTINGUISHER. THE OPERATOR EXITED THE BOAT ONTO THE DOCK. ONCE ON THE DOCK, HE PUSHED THE BOAT AWAY TO ENSURE NO OTHER PEOPLE ON THE DOCK WERE INJURED. THE OPERATOR''S FATHER, WHO WAS ON THE DOCK, CALLED 911 AND REPORTED THE INCIDENT. ROCK FALLS FIRE DEPARTMENT ARRIVED AND EXTINGUISHED THE BOAT.