What should you do before starting an in board gasoline engine?

Before starting an inboard gasoline engine, ensure that the engine compartment is well-ventilated to disperse any potential fuel vapors. Check the fuel levels and inspect for leaks or any signs of damage in the fuel lines and connections. Additionally, verify that the engine's oil and coolant levels are adequate and that the battery is charged. Lastly, ensure all safety equipment is in place and functioning properly.