This comprehensive service and repair manual provides a detailed guide for the 1987 Yamaha 4SH outboard motor. The manual presents procedures in a clear step-by-step format, designed to assist mechanics in performing disassembly, repair, assembly, and inspection operations efficiently. Each chapter includes exploded diagrams before each disassembly section, ensuring clarity and ease in identifying the correct procedures. The manual encompasses a wide range of information, offering a thorough understanding of all aspects of the motor.

The Yamaha 4SH outboard motor is a robust and reliable powerplant designed for a range of small watercraft. This engine is a single-cylinder, four-stroke unit known for its simplicity and ease of maintenance. Its compact design makes it ideal for smaller boats like dinghies, tenders, and small fishing boats. The 4SH is renowned for its smooth operation, low noise levels, and fuel efficiency. It boasts a displacement of 49cc, which translates to respectable power output for its size. This engine is particularly popular among boat owners who prioritize reliability, ease of use, and affordability.

The 4SH is renowned for its durability and longevity. Its robust construction and quality components ensure that it can withstand the harsh conditions often encountered on the water. Yamaha's reputation for quality engineering shines through in this model, making it a favorite among seasoned boaters and weekend anglers alike. The 4SH is also known for its straightforward design, making maintenance and repairs relatively easy for even novice mechanics. Its accessibility and readily available parts ensure that getting your 4SH back in top condition is a straightforward process. Overall, the Yamaha 4SH outboard motor is a reliable and efficient powerplant that embodies the brand's commitment to quality and performance. It's a perfect choice for boaters who value simplicity, durability, and affordability.