This comprehensive workshop service repair manual is specifically designed for Mercury Mercruiser Number 8 marine engines equipped with 4-cylinder Mercury Marine engines, covering models manufactured between 1985 and 1989. This manual offers detailed instructions and high-quality diagrams to guide you through the process of servicing and repairing your boat's engine. The manual covers a wide range of topics, including essential information on removing and installing engine components, understanding the engine's mechanical systems, troubleshooting and resolving issues with electrical systems, deciphering and working with fuel systems, addressing cooling and exhaust system problems, and maintaining the power steering system. It includes detailed explanations of the following specific models: * MCM 170 MR (serial numbers 6916779 to 0A475151) * MCM 170 Alpha One (serial numbers 0A475152 to 0B434940) * MCM 165 Alpha One (serial numbers 0B434941 to 0B774251) * MCM 3.7 Litre Alpha One (serial numbers 0B774252 and above) * MCM 190 MR (serial numbers 6917368 to 0A475551) * MCM 190 Alpha One (serial numbers 0A475552 to 0B436390) * MCM 180 Alpha One (serial numbers 0B436391 to 0B775248) * MCM 3.7 Litre LX Alpha One (serial numbers 0B775249 and above) This manual is an indispensable resource for any boat owner or DIY enthusiast looking to perform maintenance or repairs on their Mercury Mercruiser Number 8 engine.

The Mercury Mercruiser Number 8 marine engine, a stalwart of the 1980s boating scene, represents a significant entry in the Mercury Mercruiser lineup. This 4-cylinder engine, produced between 1985 and 1989, was renowned for its robust construction and reliable performance. Designed for a range of recreational and commercial applications, the Number 8 engine powered everything from fishing boats to small cruisers. Its compact size and relatively low weight made it ideal for boats with limited space and weight capacity. The engine's design incorporated features like a cast iron block and an overhead valve arrangement, contributing to its durability and efficiency. Additionally, the Number 8 was known for its smooth operation and relatively quiet running, enhancing the overall boating experience. The Mercury Mercruiser Number 8 engine boasts a displacement of 135 cubic inches, translating to approximately 2.2 liters. This engine was typically paired with a Mercruiser sterndrive system, allowing for easy maneuvering and smooth transitions between speeds. The Number 8 was offered in various configurations, including versions with different horsepower ratings and options for either manual or automatic transmission. While the engine's production has ceased, its impact on the marine industry remains substantial. Its reliability and performance made it a popular choice among boaters, contributing to the Mercruiser brand's reputation for quality and innovation. Today, dedicated owners and enthusiasts continue to maintain and restore these engines, ensuring their continued presence on the water.