This Recmar alternator is a high-quality aftermarket replacement for MerCruiser sterndrive/inboard applications using the OEM-style alternator referenced as 78403A2. It is designed for 12V charging systems and is specified by Recmar at 63A, with a single (V-belt) pulley and a self-exciting (internal) regulator.

Before ordering: fitment can vary by engine/serial number and existing alternator type. Always match your engine details and the part number stamped on the alternator currently fitted.

• Part type: Alternator
• Intended engine fitment: MerCruiser 3.0, V6 & V8 (V-belt/single pulley applications)
• Electrical rating: 12V, 63A (Recmar spec)
• Pulley: Single groove (V-belt)
• Regulator: Self-exciting / internal regulator (Recmar spec)
• Aftermarket reference: Recmar REC78403A2

OEM / cross-reference numbers (verify before purchase):
MerCruiser/Quicksilver: 78403A2, 78403A1, 78403, 78402, 817119A4, 817119A1, 817119R01, 92497A3, 98555A1, 8M0033842, 8M6007458, 12449A1, 90794, 881247, 889956.
OMC: 3860769, 988247.

Fitment varies by engine version. Confirm compatibility by engine model/serial number and alternator reference numbers before ordering.