This operation manual covers the Yanmar SVE8 and SVE12 marine diesel engines, designed for reliable marine propulsion. These engines are engineered with quality and durability in mind, utilizing diesel fuel to deliver consistent performance for your marine applications. The Yanmar brand is recognized for its commitment to robust engineering, ensuring these engines are a dependable choice for various marine needs. This manual provides comprehensive guidance for the operation and maintenance of your Yanmar marine diesel engine. It details essential procedures such as pre-operation checks, starting and stopping sequences, and monitoring during operation. Furthermore, the manual includes critical maintenance information, covering tasks like air venting, fuel system adjustments, and periodic checks. Adhering to the information within this document will help ensure optimal performance and longevity of your SVE8 or SVE12 engine.