First, turn off the motor. The grab that B rated fire extinguisher and aim it at the base of the fire. Every power boat is required to have a fire extinguisher.
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You hop out and call the fire defartment!!!!!
jump in the water
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Get your fire extinguisher and try to put the fire out.
cut of fuel supply
shut off the engine
You should hopefully have a fire extinguisher and hope you can put it out.
Switch off the motor and smother the flames with a fire extinguisher.
get of the boat and call 911, if you are at sea contact the coast guard via your radio and then try to extinguish the fire with your fire extinguisher and or buckets of water. if you have a hose on your boat use that.