Yanmar 4JH-DTE, 4JH-HTE, 4JH-TE & 4JH-DTB(E) Marine Diesel Engine Service Manual
Technician-level documentation for Yanmar marine diesel engines. Covers maintenance, troubleshooting, and specifications for 4JH-DTE, 4JH-HTE, 4JH-TE, and 4JH-DTB(E) models. Includes detailed diagrams and procedures. PN 0000A0A1647.
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Yanmar Models Covered & Key Technical Specifications
Models: Yanmar 4JHE, 4JH-TE, 4JH-HTE, 4JH-DTE, 4JH-DTBE
Sub-models / Variants: 4JH Series marine diesel engines, including models with turbochargers and intercoolers
Build Years: 1985 onwards
Serial Numbers: Engines produced at YANMAR plant on and after June 21, 1985; specific engine numbers listed from E/# 00101, E/# 11001, E/# 21001, and E/# 30101
Technical Data:
- Engine configuration: 4-cylinder, 4-cycle, vertical water-cooled diesel
- Combustion system: Direct injection
- Displacement: 1.644 liters (100.33 cu. in.)
- Max continuous output (DIN6270A): 40–70 HP (depending on model variant)
- Compression ratio: 15.9:1 to 17.8:1
- Direction of rotation: Counter-clockwise (crankshaft) and clockwise (propeller shaft) viewed from stern
- Fuel injection system: Bosch type YPES-CL in-line pump
- Injection pressure: 195–205 kg/cm² (2,773–2,915 lb/in.²)
- Electrical system: 12V 1.8kW starter, 12V 55A alternator
- Cooling system: Fresh water (centrifugal pump) and sea water (rubber impeller pump)
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Yanmar 4JH Series Engine Documentation
- Covers the Yanmar 4JHE, 4JH-TE, 4JH-HTE, 4JH-DTE, and 4JH-DTBE marine diesel engine line, documenting technical specifications, construction details, and service-specific alignment data
- Official OEM publication, Form 0000A0A1647, printed July 1985
- Contains 56 detailed exploded-view assembly diagrams and 39 comprehensive technical data tables for internal engine, fuel system, and cooling system maintenance
- Delivered as a direct download the moment payment clears
- Indexed PDF search covers every chapter and appendix
- This 317-page OEM factory reference is the primary documentation required for maintenance of the 1985-build 4JH series engines, featuring essential clearance values missing from later third-party guides
Internal Engine and Fuel System Scope
This factory manual provides an expert technical guide covering the maintenance, construction, and assembly of the Yanmar 4JH series engine family. Chapters offer in-depth documentation on the cylinder block, internal moving parts including crankshaft and pistons, cooling system architecture, and electrical components. The document details the specific construction and fuel injection equipment, including the Bosch-type YPES-CL injection pump, automatic advancing timer, and fuel feed pump configurations for various engine displacements and aspiration types.
Technical Data and Service Reference
Detailed specifications are provided for cylinder bore, valve clearance, and injection timing adjustments essential for maintaining performance on the 4JHE, 4JH-TE, 4JH-HTE, and 4JH-DTE configurations. The manual lists torque values, fluid capacities, and wear limits in both metric and imperial units for shop-floor accuracy. Standard intake and exhaust valve seat angles are listed as 120 and 90 degrees, respectively, in the cylinder head service data section. Connecting rod tightening torque is specified at 4.5–5.0 kg-m (32.5–36.1 ft-lb) for all 4JH model variants. The maximum fuel injection pressure is documented at 195–205 kg/cm² (2,773–2,915 lb/in.²) across the model range. This comprehensive factory publication serves as the authoritative source for engineers and owners performing inspections or maintenance on the Yanmar 4JH series marine diesel engine family produced from 1985 onward.
Document Reference: Form 0000A0A1647, printed in Japan, July 1985
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