This manual provides comprehensive guidance for the 4 Cylinder Marine Engine, a robust and reliable powerplant designed for a variety of marine applications. Spanning multiple generations and covering series such as AB, K, KL, KLC, KBL, KFL, M, ML, MBL, W, WM, and MCL, these inline 4-cylinder gasoline engines are known for their dependable performance. With displacements typically ranging from 2.7L to 3.0L and power outputs often between 80 to 150 HP, these engines have powered countless vessels, demonstrating a commitment to quality engineering and enduring functionality.

The purpose of this Service and Adjustment Manual is to equip owners, mechanics, and technicians with the essential information needed to maintain, troubleshoot, and repair the 4 Cylinder Marine Engine. Inside, you will find detailed procedures for lubrication, ignition system adjustments, fuel system maintenance, cooling system services, and drive belt adjustments, among other critical areas. Technical specifications, including engine configurations, cooling methods, and common carburetion types, are also provided to ensure accurate diagnostics and effective servicing, promoting the longevity and optimal performance of your marine engine.