The Mercury Mariner vehicles employs an alternator most especially for charging of its battery but at the same time providing power to various electrical devices in a vehicle that is in operation. The alternator works by turning the mechanical energy from the engine into AC by using a rotating magnetic field within a stator that is then converted in to DC for usage. Various kinds of alternators have been used in the course of time on Mercury Mariner vehicles, as well as using change over excitation types including field coils and permanent magnets. While, the contemporary models employ voltage regulation system into the PCM to give stable voltage outputs, the earlier models employ both external as well as internal voltage regulators. The change to high output alternators is commonly implemented for customized Mercury Mariner vehicles in which other factory installed electrical equipments raise the load demand more than the standard alternator capability.
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