This manual covers all Yamaha LF250 PID Range: 6P3-10009571010777 & 10140901014503 3. This is a factory service manual. it covers everything about the outboard motor.3L Mfg April 2005 May 2011. This is a factory service manual. it covers everything about the outboard motor. The procedures in this manual are organized in a sequential step-by-step format. The information has been compiled to provide the mechanic with an easy to read, handy reference that contains comprehensive explenation of all disassembly, repair, assembly and inspection operations. Each chapter provides exploded diagrams before each disassembly section for ease in identifying the correct disassembly and assembly procedures.