CDI 194-5279 Mercury Mariner Voltage Regulator Voltage regulators determine the rate at which a battery charges. Having an improperly regulated charge can cause damage to other electrical parts and cause costly repairs. Wholesale Marine has an extensive inventory of engine parts and battery parts including the Mercury Outboard Voltage Regulator. Having a voltage regulator will regulate how quickly your battery charges and maintain a safe level to avoid surges to your electrical components. The C