MOSFET Rectifier Mercury Outboard (Refer to Fitments) (RM30431)Stop burning your regulator rectifier! It is time to update or replace your voltage regulator with the advanced MOSFET type. This product is an advanced design that lowers operating temperatures for extended longevity and better performance than the OEM part. It runs cooler than all OEM diode style regulators. In addition, this rectifier has overheat protection, rather than burn up it will simply turn off for a while and cool off. Direct replacement