This comprehensive service repair manual provides detailed technical information for Mercury Mariner 150 HP EFI 4-stroke outboard motors manufactured between 2002 and 2007. The manual covers every aspect of maintenance, repair, and troubleshooting for these engines. It includes detailed diagrams, illustrations, and step-by-step instructions to guide you through every procedure. You'll find information on engine operation, fuel and ignition systems, cooling system, electrical system, steering and controls, troubleshooting, and more. This manual is an essential resource for anyone who owns or maintains a Mercury Mariner 150 HP EFI 4-stroke outboard motor.

The Mercury Mariner 150 HP EFI, a four-stroke outboard motor produced from 2002 to 2007, embodies the brand's legacy of reliable and powerful marine propulsion. This engine, built upon Mercury's renowned engineering, combines the benefits of fuel-injected efficiency with robust construction and durability, making it a popular choice for a wide range of boating applications. The 150 HP EFI model boasts a 2.5-liter, 4-cylinder engine, equipped with Mercury's innovative EFI (Electronic Fuel Injection) system. This system ensures precise fuel delivery, optimizing power output and fuel efficiency. The Mariner 150 HP EFI also features a counter-rotating crankshaft, contributing to its smooth operation and low vibration levels.

This outboard motor was lauded for its robust construction, engineered to withstand the rigors of marine environments. Featuring a durable, corrosion-resistant design, the Mariner 150 HP EFI was engineered for longevity and minimal maintenance requirements. Its reliable performance and ease of operation made it a favorite among both recreational boaters and commercial operators. Its compact size and relatively low weight offered versatility in terms of installation on various boats, ranging from small runabouts to larger fishing vessels. The Mariner 150 HP EFI was renowned for its exceptional power delivery, providing ample acceleration and top speed, enabling boaters to confidently navigate various water conditions. The engine's fuel efficiency also contributed to its appeal, allowing boaters to extend their time on the water without frequent refueling.