Yanmar 4JH2E / 4JH2-TE / 4JH2-HTE / 4JH2-DTE / 4JH2-UTE Service Manual

For Yanmar 4JH2E, 4JH2-TE, 4JH2-HTE, 4JH2-DTE, 4JH2-UTE marine diesel engines: diagnostics, service, and parts. Publication A0A1029-0104.

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Document Details

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Document Number / Seller:
28654 / Stephanie Grant
File Size:
11.38 MB
File Type:
PDF
Language:
English
Pages:
406
Printable:
Yes
Category:
Inboard Engine (Sterndrive)
Last updated / verified
Oct 4, 2025

Models Covered & Key Technical Specifications

Yanmar 4JH2E, 4JH2-TE, 4JH2-HTE, 4JH2-DTE, 4JH2-UTE (A0A1029-0104) - 2001.4 Documentation | Manual File.

  • Authorized Running Clearance: 12 kg/cm² (28.26 lb/in.²) signifies the operational limit for the fuel delivery mechanism.
  • Critical Voltage Specs: For engine starting, 12V DC is the standard electrical requirement for the starter motor operation.
  • Operational Cooling Specs: 88°C (190.4°F) is the maximum recommended engine operating temperature before the thermostat opens.
  • Fundamental Mass Specs: 129470-51000 is the part number for the primary fuel injection pump assembly.
  • Specific Output Density: 1000 rpm (3,600 rpm) is the rated engine speed for continuous operation.
  • Maximum Deviation Limits: 1.5 mm (0.059 in.) represents the maximum allowable wear on the turbine shaft seal ring.

Professional Workshop Service Manual & Technical Specifications

Industrial Diagnostic Repair Manual: Yanmar 4JH2E, 4JH2-TE, 4JH2-HTE, 4JH2-DTE, 4JH2-UTE Workshop Manual - Diagnostics & Maintenance Technical-Briefing

Calibration-Scope: Yanmar 4JH2E, 4JH2-TE, 4JH2-HTE, 4JH2-DTE, 4JH2-UTE (A0A1029-0104) // Year-Coverage: 2001.4 / Marine Diesel Engine Logic // Conceptual-Layout: Diagrams & Reference Data.

Integrated-Framework Operational-Logic Calibration-Standards
Specifications Engine Cross Section Piping Diagrams
Basic Engine Parts Fuel Injection Equipment Intake and Exhaust System
Lubrication System Cooling Water System Sea Water Pump

OEM specifications cover the detailed maintenance and repair procedures for Yanmar 4JH2E, 4JH2-TE, 4JH2-HTE, 4JH2-DTE, and 4JH2-UTE marine diesel engines. This manual details component construction, inspection, disassembly, reassembly, and troubleshooting. It provides essential technical data for maintaining engine performance and reliability.

Parts identification is covered for all major components, including detailed diagrams of the engine block, cylinder head, fuel injection system, and lubrication system.

Removal procedures are documented for components such as the turbocharger, fuel pump, and oil cooler, ensuring proper maintenance practices.

Technical specifications are provided for critical engine parameters, including clearances, torques, and performance curves, aiding in accurate diagnostics and repairs.

Factory specifications are documented for the turbocharger, including its construction, interchangeability, and washing procedures.

Engine rebuild procedures are documented for key systems, offering guidance for comprehensive overhauls and component replacements.

This manual documents torque specifications for critical fasteners to ensure proper gasket seal integrity and prevent component damage during assembly.

FAQ

Check the **standard** component identification for the turbocharger's turbine shaft. keyboard_arrow_down

129571-18000 is the part number for the turbine shaft on the 4JH2-TE model.

What does the **necessary** adjustment procedures entail for the fuel injection pump timing? keyboard_arrow_down

A 0.5° difference between the crank pulley timing mark and the flywheel housing mark indicates an injection timing deviation that requires adjustment.

Reference the **recommended** pressure specifications for the lube oil cooler. keyboard_arrow_down

15kg/cm² (213.30 lb/in.²) is the test pressure for the lubricating oil circuit, ensuring proper function.

What are the **calibrated** assembly sequence steps for the governor spring? keyboard_arrow_down

The governor spring for the variable speed governor is installed with its hook facing downwards.

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Reviews (4)

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The download link was sent promptly to my email, and I had no issues accessing the manual. Very satisfied!
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I had a couple of questions after downloading, and the support team was very responsive and helpful. Highly recommend!
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The service manual is incredibly detailed and easy to follow. It helped me with my engine maintenance significantly!
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This manual covers everything you need to know about the 4JH engine. The diagrams are particularly helpful!