This manual covers Volvo Penta 3.0GS, 4.3GL, 4.3GS, and 4.3GI sterndrive engines manufactured between 1999 and 2006. These engines are engineered for reliability and performance, making them a trusted choice for marine applications. This comprehensive guide is designed to assist owners and technicians in understanding and maintaining these robust power units. The purpose of this English-language service and repair manual is to provide detailed, in-depth information for the effective maintenance and repair of your Volvo Penta sterndrive engine. It includes step-by-step instructions, accompanied by pictures and wiring diagrams, covering routine maintenance and all servicing and repair jobs. By utilizing this manual, you can gain a thorough understanding of your engine's components and repair procedures, potentially saving significant costs on professional servicing.