This service repair workshop manual covers the YANMAR 4LHE, a marine diesel engine designed for marine propulsion. YANMAR engines are recognized for their robust engineering and reliable performance, making them a trusted choice for marine applications. This manual provides comprehensive information to ensure the optimal operation and longevity of your YANMAR 4LHE unit. This manual is an essential resource for all maintenance, repair, and troubleshooting procedures. It includes detailed, step-by-step instructions, accompanied by detailed photos, diagrams, and exploded diagrams to guide you through every task. Whether you are performing routine servicing or addressing complex repairs, this manual offers the technical specifications and guidance necessary for owners and technicians to effectively maintain and service the YANMAR 4LHE marine diesel engine.