Yanmar 6LY3 Series Marine Diesel Engine Service Manual

Yanmar 6LY3 Series Marine Diesel Service Manual

• Covers the 2006 Yanmar 6LY3-ETP, 6LY3-STP, and 6LY3-UTP marine diesel engines, documenting technical specifications, maintenance, and electronic control system diagnostics
• Official Yanmar publication OBLY3-G00100, dated October 2006, serving as the primary reference for the 6YDXM5.81D6H engine family
• Includes 12 wiring diagrams, 27 exploded-view component illustrations, and a detailed diagnostic trouble code (DTC) lookup table for the Teleflex i5501E display interface
• Delivered as a direct download the moment payment clears
• Stored against your account so you can retrieve it after a hard-drive loss
• Full-text search finds any part number in seconds
• Laid out for standard letter and A4 printing
• This 366-page first edition provides the baseline documentation for the 6LY3-series performance launch, including specific troubleshooting procedures for the Electronic Control System (ECS)

Engine Maintenance and Technical Scope

The 2006 Yanmar 6LY3 series service manual documents internal engine construction, cooling systems, and specialized fuel injection equipment, providing specific values for bore, stroke, and clearance settings. It lists procedures for periodic inspection, ranging from initial 50-hour break-in to 2000-hour major maintenance intervals. The text details lubrication system construction, including lube oil pump and filter specifications, alongside detailed cooling water system diagrams and seawater pump maintenance. It covers the turbocharger assembly, including periodic checking intervals and specific tightening torque values for major bolts and nuts.

Specifications and Diagnostic Data

Technical data includes specific valve clearance settings for intake and exhaust valves, documented at 0.15–0.25 mm and 0.45–0.55 mm respectively. The fuel system data specifies a no-load idle speed setting of 700 ± 25 RPM, with nozzle opening pressures of 24.00–24.98 MPa. Coolant capacity for the 2006 6LY3 series is documented at 28 liters for the engine and 1.5 liters for the recovery tank. Electrical reference values are presented in the ECU pin configuration and fuse troubleshooting tables, assisting in diagnosing common faults in marine diesel electronic control systems.

Reference only — always consult a certified technician before performing service on this equipment. An official 366-page Yanmar OEM workshop manual covering the 2006 6LY3-ETP, 6LY3-STP, and 6LY3-UTP, documenting engine, chassis, electrical, and fuel-injection specifications for the 6YDXM5.81D6H build.