This manual covers the 1975 120 HP Outboard, a robust marine engine known for its reliable performance. Outboard motors represented a significant part of the marine industry during their production, and the 120 HP model was a substantial offering, likely featuring a V4 or V6 configuration. This engine was developed during a period of advancement in outboard motor technology, and this comprehensive guide ensures you have the information needed to maintain its operational integrity. This workshop manual provides in-depth service, repair, and troubleshooting guidance for your 1975 120 HP Outboard. It details procedures for all major repairs, routine maintenance, tune-ups, and diagnostic processes. Coverage includes the powerhead, fuel system, electrical components, starter systems, and gear housing, with specific attention to carburetor rebuilds, ignition timing, and electrical component testing. This manual is designed for owners with basic mechanical skills and professional technicians, offering dealer-level technical information to facilitate efficient and cost-effective maintenance and repair.