This service repair manual covers engines, applicable to all years and a range of horsepower models including 35, 50, 85, 125, and 150 HP. These engines are characterized by their 2-stroke configuration, water-cooled systems, and CDI ignition. Typical fuel systems utilize multiple carburetors and a pre-mix fuel ratio, while the drive system consists of an outboard lower unit with a propeller. The manual is designed for English language users and is presented in format. This comprehensive manual provides detailed information essential for the maintenance and repair of your. It covers critical areas such as lubrication, fuel system servicing, ignition system diagnostics, cooling system maintenance including water pump impeller replacement, power head overhauls, electrical starter system troubleshooting, propeller and lower unit service. By following the procedures outlined within, owners and technicians can ensure the optimal performance, reliability, and longevity of their engines.