SIERRA 68A 1-Wire Marine Alternator for MerCruiser – 18-5956-1

Description

SIERRA 68A 1-Wire Marine Alternator for MerCruiser – 18-5956-1 is a 68-amp one-wire replacement marine alternator supplied with cooling fan and pulley.

This unit replaces a broad family of legacy MerCruiser/Motorola-style alternators. The one-wire configuration simplifies the charging connection but must match the boat engine wiring and mounting arrangement.

Key Features

• 68-amp rated output
• One-wire marine alternator configuration
• Supplied with fan and drive pulley
• Fits selected MerCruiser and compatible inboard applications
• Replaces multiple MerCruiser/Motorola service numbers

Specifications

• Manufacturer Part Number: 18-5956-1
• Product Type: Marine alternator
• Rated Output: 68 A
• Wiring: 1-wire
• Included: Fan and drive pulley

Interchange / Cross Reference

• MerCruiser 56045 / 59755 / 69729
• MerCruiser 78403A1 / 78403A2
• MerCruiser 78477 / 90794
• GLM 74000
• Mallory 9-19100
• ARCO 20102

Verify case/mounting, pulley alignment and electrical connection against the original alternator before ordering.