Description
The Sierra 18-6261 Alternator is a heavy-duty, marine-grade aftermarket components package engineered primarily for OMC stern drive and late-model Volvo Penta inboard/outboard engines. It is designed to meet or exceed original equipment manufacturer (OEM) standards and features full certification for critical marine safety specifications including USCG, SAE J1171, and ISO 8846 ignition protection standards.
Technical Specifications
- Voltage: 12V
- Amperage Output: 65 Amps
- Pulley Design: Single groove pulley (V-Belt type)
- Regulator: Internal, heavy-duty
- Wiring Setup: 2-wire system (not 1-wire capable)
- Rotation Direction: Clockwise
- Cooling: External fan type
- Internal Components: Marine-grade construction featuring heavy-duty bearings, stators, and high-efficiency rectifiers.
Engine Compatibility
This alternator fits a wide variety of marine engine displacements spanning major production years (particularly 1993–1998):
- 3.0L, 4.3L, 5.0L, 5.7L, 5.8L, 7.4L, and 8.2L OMC and Volvo Penta configurations.
OEM Cross-Reference & Part Numbers
The Sierra 18-6261 directly replaces several factory part numbers across Volvo, OMC, and alternative marine parts manufacturers:
- Volvo Penta: 3856600-6, 3857561, 3854182-7, 3857561-9, 3860171
- OMC: 987774, 3854182, 3856600, 3857561, 3860171
- Arco: 60070
- Mando: AC165618, M59819
- API Marine: 20094
