2005-2006 Yamaha F250/LF250 Outboard Motor Service Manual (P/N LIT-18616-02-97)

This 386-page factory publication (LIT-18616-02-97, revised May 2006) serves as the primary technical reference for the 2005–2006 Yamaha F250 and LF250 outboard line. It details the maintenance, engine assembly, fuel system, and electrical diagnostic parameters necessary for professional marine servicing.

• Features detailed exploded-view diagrams, electrical circuit schematics, and torque-specification tables for major assemblies.
• Documents comprehensive service intervals, component clearances, and wear limits to support routine workshop maintenance.
• Identifies exact serial-number ranges starting at 6P2 1000001 and 6P3 1000001 for 2005 models.
• Covers F250TR and LF250TR variants, detailing the 4-stroke DOHC V6 engine architecture.

Manual Content and Coverage

The 2005–2006 Yamaha service manual delivers structured data essential for professional workshop environments. It breaks down the entire V6 power unit, lower unit, bracket assembly, and fuel management systems. Technicians will find critical assembly protocols outlining ECM system diagnostics, variable camshaft timing parameters, and ignition control timing. The chapters also systematically map out the electronic fuel injection system, throttle valve control, and complex sensor functions. Please note that this page serves purely as a comprehensive review of the publication's contents. Verifying correct application via these specifications is a critical safety step before executing any physical teardown or repair.

Engine and Component Specifications

Precise technical data forms the core of this publication. You get exact tightening torque values for all engine fasteners, including complex cylinder head bolt sequences and spark plug guidelines. The manual lists engine oil capacity at 5.6 liters without a filter, increasing to 5.8 liters when a filter replacement occurs. For upper valvetrain work, the intake valve clearance is set at 0.20 ± 0.03 mm. It also documents the cooling system thermostat opening temperature at 58–62 °C (136–144 °F). Finally, idle fuel pressure reference values are mapped at 260 kPa (37.7 psi) to assist mechanics with accurate fuel pump and regulator diagnostics.