This comprehensive service and repair manual provides detailed instructions and technical specifications for Perkins 4.108, 4.107, and 4.99 marine engines manufactured in 1978. It covers all aspects of maintenance and repair, including engine disassembly and reassembly, troubleshooting, component replacement, and adjustments. This manual is an essential resource for anyone involved in the servicing or repair of these marine engines, from professional technicians to dedicated boat owners. The manual serves as a valuable reference guide for understanding the engine's operation, diagnosing problems, and performing repairs efficiently and effectively.

The PERKINS 4.108, 4.107, and 4.99 marine engines, popular choices for recreational and commercial vessels, were renowned for their robust construction and reliable performance. These naturally aspirated, four-cylinder, water-cooled diesel engines were manufactured by Perkins Engines Company, a leading name in the diesel engine industry. The 4.108, 4.107, and 4.99 models, produced from 1978 onward, shared a common design, with variations in displacement and power output. They offered a range of power outputs, typically between 60 and 100 horsepower, making them suitable for a variety of marine applications. These engines were known for their durability and ease of maintenance. The robust cast-iron construction of the engine block and cylinder head provided strength and longevity. The direct-injection fuel system offered efficient combustion and reduced emissions. The Perkins 4.108, 4.107, and 4.99 engines were also equipped with a simple and reliable mechanical governor system, guaranteeing consistent performance across a range of operating conditions. While the 4.108 and 4.107 models are no longer in production, they remain popular options for boat owners seeking reliable and robust power for their vessels. These marine engines, renowned for their durability and straightforward engineering, continue to serve as reliable workhorses for boats across the globe.