This manual covers the YANMAR 4LH-TE and 4LH-HTE marine diesel engines, designed for reliable marine propulsion. These turbocharged and intercooled engines represent a robust engineering solution for demanding maritime applications. Their construction emphasizes durability and performance, ensuring efficient operation across a range of conditions. This comprehensive Full Service & Repair Workshop Manual provides detailed guidance for all repair, servicing, and troubleshooting procedures. It is intended for professional mechanics and technicians, offering hundreds of pages of content with detailed photos, diagrams, and exploded views. This resource is essential for maintaining the optimal performance and longevity of your YANMAR marine diesel engine.