This manual covers the Yamaha 6LH outboard motor, produced in 1987. Designed for marine propulsion in a marine environment, this diesel engine represents robust engineering for reliable operation. Its intended use as a primary power source for watercraft underscores its importance in maritime applications. This comprehensive Service Repair Maintenance manual provides detailed information essential for the upkeep and repair of your Yamaha 6LH outboard motor. It includes procedures for disassembly, repair, assembly, and inspection operations, supported by exploded diagrams for clarity. This guide is an indispensable resource for owners, mechanics, and technicians seeking to maintain the optimal performance and longevity of their marine propulsion system.