Yanmar 6LY3 Series Marine Diesel Engine Service Manual

Diagnostic procedures, component service, and maintenance for Yanmar 6LY3-ETP, 6LY3-STP, 6LY3-UTP: Includes fuel system, lubrication, cooling, and electrical systems. Part ID: 0BLY3-G00100.

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Document Details

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Document Number / Seller:
28655 / Lisa Taylor
File Size:
25.91 MB
File Type:
PDF
Language:
English
Pages:
366
Printable:
Yes
Category:
Inboard-Engines-Sterndrives
Last updated / verified
Apr 24, 2025

Models Covered & Key Technical Specifications

Comprehensive Procedure Manual: Yanmar 6LY3-ETP, 6LY3-STP, 6LY3-UTP (2006) Technical-Briefing | Collection Division.

Approved Cycle Rate: 321 kW (436hp) at 3198 RPM establishes the maximum output capacity. Factory Rotation Data: For smooth operation, Counterclockwise viewed from stern defines the direction. Primary Installation Footprint: The engine measures 1300.4 mm (51.2 inches) in overall length. General Threaded Fastener Data: M8 x 45 mm bolts secure the gear case. Essential Alignment Specs: Shaft alignment requires 0.12-0.22 mm for the idle gear. Operational Output Performance: The fuel injection pressure is 24.00-24.98 MPa for the nozzle.

Manual Description & Preview

Comprehensive Procedure Manual: Yanmar 6LY3 Series Marine Diesel Engine Precision Maintenance: Yanmar 6LY3-ETP, 6LY3-STP, 6LY3-UTP (2006) Technical-Briefing

Specification-Class: 5.813 L // Application-Range: Marine Diesel Engine // Series-Validation: 6LY3 Series. Suspension service documentation covers General and Main Specifications. Disassembly instructions are documented for Fuel oil, lubricating oil and cooling water. Wear limits are specified for Lubrication system and Cooling water system. System operation descriptions cover Intake and exhaust system and Turbocharger. The documentation addresses Electrical system and Service standards.

Metric Diagnostic-Logic Validation-Data
Engine Model 6LY3-ETP 6LY3-STP
Displacement 5.813 L 5.813 L
Bore x Stroke 105.9 x 110 mm 105.9 x 110 mm
Continuous Power 321 kW @ 3198 min-1 295 kW @ 3198 min-1

Technical chapters are organized around the following:

  • General information, including exterior views and main specifications.
  • Troubleshooting procedures for common engine issues.
  • Disassembly and reassembly instructions for various engine components.
  • Inspection and servicing of basic engine parts.
  • Fuel injection equipment details, including pumps and nozzles.

The manual documents torque specifications for various components to ensure proper joint separation prevention.

FAQ

What is the **required** fluid capacity for the engine oil? keyboard_arrow_down

18.8 L is the total oil capacity for the engine at rake angle 0 degree.

Calculate the **specified** component identification for the fuel filter. keyboard_arrow_down

Refer to section 6.4 for detailed fuel filter specifications and replacement procedures.

What values are **essential** for the valve clearance adjustment? keyboard_arrow_down

0.15-0.25 mm for intake valve and 0.45-0.55 mm for exhaust valve are the essential clearances.

Assess the **correct** pressure specifications for the boost sensor. keyboard_arrow_down

The boost pressure sensor's output voltage is between 0.5 and 3.6V for normal operation.

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