This manual covers the Yanmar 4TNV98-ZNMS, 4TNV98T-ZNMS, 4TNV98-ZNTBL, and 4TNV98T-ZNTBL engine models. These engines are designed for robust performance and reliability in various applications, including compatibility with specific Mustang and Gehl equipment. The naturally-aspirated and turbocharged variants ensure adaptability to different operational demands, reflecting Yanmar's commitment to engineering excellence. This Illustrated Master Parts List provides comprehensive details for maintaining and identifying components for your Yanmar engine. It includes step-by-step instructions, exploded views, and diagrams for a wide array of engine parts, such as the cylinder block, fuel system, lubrication and cooling systems, and specific components for turbocharged models. This manual is an essential resource for owners and technicians to ensure the optimal performance and longevity of their Yanmar engines.