37240-P13-013 Oil Pressure Switch - Overview. The 37240-P13-013 Oil Pressure Switch is a vital component of the Honda marine engine systems. This switch is responsible for monitoring the oil pressure within the engine, providing critical alerts to prevent damage due to low oil pressure. It plays an essential role in maintaining engine reliability and performance. Designed to fit perfectly with existing engine hardware and seals, it ensures seamless integration, maintaining optimal performance an