Arco 20104 OEM Premium Replacement Alternator fits Mercruiser, BRP-OMC engines. The marine engine alternator is rated 12 volt and 70 amps, featuring ignition protection screens, an internal regulator, Negative ground, 2-wire plug and 2" mounting foot. It is supplied complete with a single groove pulley.

The Arco alternator replaces the following part numbers:

- Mercury 78477 Alternator

- BRP-OMC 982364 Alternator

- Sierra 18-5951 Alternator

- Protorque PH200-T014 Alternator

- MPParts TRM0004 Alternator