With the advantages of environmental protection, high efficiency and low noise, electric outboard motors are widely used in leisure boating, fishing operations, water rescue and other scenarios. However, due to factors such as battery characteristics, circuit faults and improper operation, there is still a fire hazard. Different from traditional fuel-powered outboard motors, fires in electric outboard motors are mostly related to lithium battery thermal runaway and short circuits. The fire spreads rapidly and may be accompanied by the release of toxic gases. Improper handling can easily cause casualties, equipment damage and even water pollution. Mastering scientific emergency handling methods can minimize losses and protect the safety of personnel and property. The following is a detailed emergency disposal process and relevant precautions.

I. Initial Fire Stage: Rapid Response and Precise Fire Control (Golden Disposal Period)

In the initial stage of an electric outboard motor fire, the fire is small and spreads slowly, which is the key stage to control the fire. The core principle is "prioritize people's safety first, then cut off the source, and finally put out the fire" to avoid the fire expanding.

(1) Immediately Issue an Alarm and Evacuate Personnel

Upon discovering a fire, immediately shout "Fire!" loudly, clearly inform all personnel on board of the fire location (electric outboard motor area), and guide personnel to quickly put on life-saving equipment and evacuate to a safe area—preferentially transfer to the bow of the ship, away from the flame, thick smoke and the location of the battery. Do not stay, watch or try to rescue personal belongings in the fire area. If there are minors, the elderly or people with reduced mobility on board, prioritize assisting their evacuation to ensure all personnel are away from the dangerous area, maintaining a safe distance of at least 50 meters to prevent the risk of explosion caused by lithium battery thermal runaway.

(2) Cut Off the Power Supply to Eliminate the Fire Source

The power supply is the core "source" of electric outboard motor fires. Before cutting off the power supply, putting out the fire may easily cause electric shock, fire intensification and other dangers, so it is necessary to prioritize cutting off the power supply:

- If the fire has not spread to the power switch, immediately turn off the main power switch of the electric outboard motor and unplug the battery plug (if safely accessible) to completely cut off the power supply;

- If the power switch is covered by flames or inaccessible, do not touch it forcibly. Try to disconnect the main power supply of the ship, or use dry insulating tools (such as dry wooden sticks, insulating pliers) to separate the battery connection lines to avoid electric shock caused by direct contact with live parts;

- If a lithium battery pack is used, be alert to the risk of lithium battery thermal runaway. Do not stay close after cutting off the power supply, as lithium battery combustion may cause a chain reaction and even explosion.

It should be particularly noted that the protection level of the dry end of the electric outboard motor is usually IPX6, and the wet end is IPX8, but the protective structure may be damaged when on fire. Water splashing can easily cause short circuits and intensify the fire. Therefore, it is strictly prohibited to directly spray water before cutting off the power supply.

(3) Scientific Fire Extinguishing and Precise Disposal

After cutting off the power supply, select appropriate fire extinguishing equipment according to the size of the fire, give priority to targeted equipment, and avoid blind fire extinguishing:

- Small initial fire (only the surface of the outboard motor or wires are on fire): Give priority to using dry powder fire extinguishers or carbon dioxide fire extinguishers, spray evenly at the root of the flame, and follow the operation specifications of "lift, pull, hold and press" until the flame is extinguished. These two types of fire extinguishers are non-conductive, can effectively put out electrical fires, and will not cause secondary damage to equipment, especially suitable for the disposal of initial lithium battery fires—it should be noted that carbon dioxide fire extinguishers will produce low temperature when used, so avoid close contact to prevent skin frostbite;

- Fire involving lithium battery pack: If the lithium battery catches fire or swells, do not use water or foam fire extinguishers. Water will intensify lithium battery thermal runaway, and foam cannot block the internal reaction of the battery. Continue to suppress the fire with dry powder fire extinguishers, and immediately evacuate to a safe area to wait for professional rescue;

- Fire spreading to the ship hull: If the fire has spread to flammable parts of the ship hull (such as seats, interior decoration), while using fire extinguishers, use the standby fire sand on the ship to cover the open fire to block the spread of the fire. If conditions permit, start the fixed fire extinguishing system on the ship to assist in fire control.

Important reminder: Do not directly use water to put out electrical fires without cutting off the power supply, nor cover the flame with wet towels or wet clothes to avoid electric shock accidents; when putting out the fire, stand upwind and away from thick smoke to prevent inhalation of toxic gases (such as hydrogen fluoride) released by lithium battery combustion.

II. Out-of-Control Fire: Resolutely Evacuate and Seek Professional Rescue

If the fire is not controlled within 5-10 minutes and the following situations occur, it means the fire is out of control. Immediately abandon self-fire extinguishing and prioritize ensuring personnel safety: the fire spreads rapidly to most areas of the ship hull, the lithium battery swells violently or makes abnormal noises, a large amount of toxic thick smoke is generated, or there are signs of explosion. At this time, perform the following operations:

(1) Emergency Evacuation and Stay Away from Danger

Organize all personnel to immediately evacuate to lifeboats, life rafts, or jump into the water with life jackets (only when there are rescue ships nearby and the water area is safe). During evacuation, avoid contact with combustibles, high-temperature parts and toxic thick smoke. After evacuation, quickly stay away from the burning ship to prevent secondary injuries caused by battery explosion and ship hull collapse.

(2) Timely Alarm and Clear Information

After evacuating to a safe area, immediately call the rescue phone and clearly state the following key information to ensure that rescuers arrive quickly:

- Emergency calls: Prioritize dialing the special water rescue phone 12395, and dial the 119 fire alarm phone at the same time;

- Specific location: Accurately state the water area (such as XX fishing port, XX area of XX reservoir, GPS coordinates) to facilitate rescuers to locate;

- Fire details: Clearly state that it is an electric outboard motor fire, whether it involves lithium batteries, the size of the fire, and whether there are casualties;

- Ship situation: Inform the number of personnel on board, the ship model, and whether flammable and explosive items (such as spare batteries, fuel) are carried.

If conditions permit, send a "Mayday" distress signal through VHF channel 16, activate the 406MHz emergency position-indicating radio beacon (EPIRB), and deploy visual distress signals such as flares and orange smoke to improve rescue efficiency.

(3) On-Site Alert and Cooperation with Rescue

Before rescuers arrive, arrange special personnel to stand guard in a safe area to prohibit other ships from approaching the burning ship, preventing the fire from spreading to other ships or causing water pollution; at the same time, sort out the information of personnel on board, prepare for rescue cooperation, and inform rescuers of fire details and potential risks (such as the location of lithium batteries, whether the power supply is cut off).

III. Post-Incident Disposal: Investigate Hidden Dangers and Prevent Re-Ignition

After the fire is completely extinguished, do not return to the ship or restart the equipment immediately. It is necessary to do a good job in post-incident disposal, investigate hidden dangers, and avoid re-ignition and secondary accidents:

(1) Confirm Safety and Investigate Hidden Dangers

Only after rescuers confirm safety can you return to the ship and focus on investigating the following contents:

- Battery status: Check whether the lithium battery pack has swelling, damage or leakage. If there is any abnormality, it should be handled by professionals. Do not disassemble or carry it by yourself to avoid secondary combustion;

- Circuit condition: Check whether the wires of the outboard motor are damaged or short-circuited, whether the connectors are loose or corroded, investigate hidden dangers of the electrical system, and confirm that there is no risk of electric leakage or re-ignition;

- Ship hull and surrounding area: Check whether the flammable parts of the ship hull are completely extinguished, whether there are residual sparks, clean up combustion residues to prevent re-ignition; at the same time, check whether there is oil pollution or battery leakage in the water area, and contact the relevant departments in time for treatment to avoid water pollution.

(2) Equipment Disposal and Professional Maintenance

The electric outboard motor and battery pack after the fire shall not be used continuously. It is necessary to contact professional maintenance personnel or the manufacturer for comprehensive inspection and maintenance:

- Damaged electric outboard motor: It is necessary to disassemble and inspect the motor, circuit and control system, replace damaged parts, and ensure that the equipment meets safety standards (such as the motor temperature rise does not exceed 80℃, and the protection level meets the standard) before reusing;

- Lithium battery pack: If it has been burned or swollen, it shall be disposed of in accordance with the specifications for hazardous waste. Do not discard it at will or charge it again for use to avoid safety hazards—in particular, lithium batteries within the recall scope should be replaced by contacting the manufacturer in time to eliminate hidden dangers.

(3) Accident Review and Lesson Summary

Record the time, cause, disposal process and losses of the fire, and review the accident lessons: If the fire is caused by improper operation (such as overload operation, illegal charging), the subsequent operation should be standardized; if the fire is caused by equipment failure (such as aging wires, battery quality problems), the daily inspection and maintenance of the equipment should be strengthened, and old parts should be replaced in time.

IV. Prevention First: Daily Protection to Avoid Fire Hazards from the Source

Most electric outboard motor fires can be prevented. Doing a good job in the following protection measures in daily use can greatly reduce the risk of fire and safeguard the safety bottom line:

(1) Standardize Equipment Selection and Installation

Select electric outboard motors and supporting batteries that meet national standards, preferentially choose lithium batteries with a protection level of IP67 or above, and the shell should have salt spray corrosion resistance and vibration impact resistance; the control box should be made of flame-retardant materials to ensure that the emergency stop function is normal and can stop rotating within 3 seconds; the installation should be operated by professionals to avoid reverse wiring and loose connectors, ensure that the power supply cannot start when the positive and negative poles are reversed, and do a good job in grounding protection to prevent electric leakage.

(2) Strictly Standardize Operation Procedures

- Operation specifications: Avoid operating the outboard motor at 100% maximum power for a long time, and it is recommended to limit it to within 85% to prevent overload output of the lithium battery; pay attention to the BMS early warning information in real time during navigation, and immediately stop the machine for inspection in case of abnormal temperature, voltage fluctuation and other situations;

- Charging specifications: Use the original matching charger, avoid using non-marine chargers to prevent overcharging from causing battery overheating; place it in a dry, ventilated and fire-proof area when charging, away from flammables, avoid unattended charging, and the charging surface should preferably use fire-proof materials such as ceramics and metals; keep the battery at 50%-70% power when moored for a long time to avoid overcharging and over-discharging;

- Environment avoidance: Avoid parking the outboard motor in a high-temperature and sun-exposed environment for a long time. Batteries in the scorching sun are prone to swelling and fire; avoid the propeller hitting hard objects or being entangled by water plants to prevent motor shell rupture and drive shaft bending from causing overheating.

(3) Strengthen Daily Inspection and Maintenance

- Regular inspection: Inspect the wires, connectors and motor of the electric outboard motor every month, replace aging and damaged wires and seals in time, and clean the dust and debris on the motor surface to avoid short circuits; check whether the battery terminals are corroded or loose, and clean the terminal stains regularly;

- Fire-fighting equipment: Equip dry powder fire extinguishers, carbon dioxide fire extinguishers, fire sand and other equipment in accordance with regulations, check the pressure and validity period of fire extinguishers every month to ensure they are in good condition and usable; install smoke detectors on the ship to detect initial fires in time;

- Hidden danger investigation: It is forbidden to pull random wires and use high-power electrical appliances illegally; check the battery status regularly, and immediately stop using and replace it if the battery swells, leaks or heats up; avoid storing spare batteries, fuel and other flammable and explosive items in the same cabin as the outboard motor.

(4) Improve Emergency Handling Capabilities

All personnel on board should be familiar with the structure of the electric outboard motor, the location of the power switch and the use method of fire-fighting equipment, carry out regular emergency drills, and master the processes of initial fire disposal, personnel evacuation and alarm for rescue; understand the particularity of lithium battery fires, and keep in mind the principle of "no water, cut off power first, and evacuate quickly" to avoid disposal errors.

V. Core Reminder: Safety First, Scientific Disposal

The core risks of electric outboard motor fires are lithium battery thermal runaway and electrical electric shock. In the disposal process, always follow the principle of "prioritizing personal safety", do not blindly put out the fire or risk rescuing equipment; the initial fire disposal should be fast and precise, cutting off the power supply is the key, and appropriate equipment should be selected for fire extinguishing; when the fire is out of control, evacuate resolutely and seek rescue in time to avoid greater losses.

Safety is always the first priority in water operations or leisure travel. Doing a good job in the daily protection and maintenance of electric outboard motors and proficiently mastering emergency handling methods can effectively avoid fire hazards and protect the safety of every water trip. At the same time, keep in mind the 12395 water rescue phone number, do not panic in case of emergency, handle it scientifically and seek rescue in time to minimize casualties and property losses.