31750-ZZ5-013 Regulator Rectifier - Overview. The 31750-ZZ5-013 Regulator Rectifier is a crucial component in Honda marine engine systems, designed to convert AC current produced by the engine into DC current, regulating voltage to charge the battery and power the electrical systems effectively. This part supports the battery management system of Honda outboard engines, ensuring they operate reliably and efficiently on the water. Manufactured to strict OEM standards, it integrates seamlessly wit