Part of the Yanmar Repair Manuals.
Set the 84 mm bore of a 3JH3 against a bore gauge and the wear limit question answers itself: 84.00 to 84.03 mm standard, and this Yanmar service manual (publication HINSHI-H8009) is where that number lives. It covers the 3JH3(B)(C)E(A), 4JH3(B)(C)E, and 4JH3CE1 marine diesels built from 2000 to 2005, with 3JH3E series coverage from serial prefix A01158 onward.
Across 305 pages it works through the basic engine parts, the fuel injection pump and governor, lubrication, sea water and fresh water cooling, the KM3A and KM3P4 marine gears, the electrical system, and complete disassembly and reassembly backed by a table of standard measurements. Every hour spent guessing at a clearance is an hour the engine stays apart on the stand.
The file is a bookmarked, searchable PDF, so you can keep it on a laptop at the bench, print the greasy-hands pages, and have the torque sequences wherever the engine is.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| History of Revision | 4-7 | Fuel Injection Timing Adjustment, Crankshaft V-Pulley Fastening Bolt Tightening Torque, Remote Control Cable Connection, EPA/ARB Certified Tamper Resistance |
| For Safety | 9-14 | 1. for Safe Servicing, Precaution for Safe Servicing |
| General | 15-31 | Exterior Views, Specifications, Engine Outline, Piping Diagrams |
| Inspection and Servicing of Basic Engine Parts | 32-61 | Cylinder Block, Cylinder Head, Piston and Piston Pins, Connecting Rod, Crankshaft and Main Bearing, Camshaft and Tappets, Timing Gear, Flywheel and Housing |
| Fuel Injection Equipment | 62-110 | Fuel Injection Pump Service Data, Governor, Disassembly, Reassembly and Inspection of Fuel Injection Pump, Fuel Injection Pump and Governor, Fuel Feed Pump, Fuel Injection Nozzle |
| Intake and Exhaust System | 111-113 | Intake System, Exhaust System |
| Lubrication System | 114-123 | Lube Oil Pump, Lube Oil Filter, Lube Oil Cooler, Rotary Waste Oil Pump (Optional) |
| Cooling Water System | 124-142 | Sea Water Pump, Fresh Water Pump, Heat Exchaniger, Pressure Cap and Sub Tank, Thermostat, Bilge Pump and Bilge Strainer (Optional) |
| Reduction and Reversing Gear | 143-199 | Marine Gear Models [KM3A], Shifting Device, Inspection and Servicing, Disassembly, Reassembly, Marine Gear Models [KM3P4] |
| Remote Control (Optional) | 200-205 | Remote Control System, Remote Control Installation, Remote Control Inspection, Remote Control Adjustment |
| Electrical System | 206-256 | Battery, Starter Motor, Alternator Standard, 12V/55A, Alternator 12V/80A (Optional), Instrument Panel, Waming Devices |
| Disassembly and Reassembly | 257-298 | Disassembly and Reassembly Precautions, Disassembly and Reassembly Tools, Table of Standard Measurements for Maintenance |
| Troubleshooting | 299-304 | Fuel Oil System, Fuel Injection Pump, Governor, Marine Gear, Cylinder Output, Exhaust Color, Cooling Water System, Lube Oil System |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Fuel injection nozzle opening pressure | 215~225 kg/cm² | p. 94 |
| Bore x stroke | 84 x 90 mm | p. 18 |
| Cylinder bore dia. (Standard) | 84.00~84.03 mm | p. 35 |
| Connecting rod tightening torque | 4.5~5.5 kgf-m | p. 48 |
| 3JH3(B)(C)E(A) | ||
| Number of cylinders, 3JH3(B)(C)E(A) | 3 | p. 1 |
| 4JH3(B)(C)E, 4JH3CE1 | ||
| Number of cylinders (4JH3(B)(C)E, 4JH3CE1) | 4 | p. 1 |
| most models (17.4 for 3JH3(B)(C)E on p18) | ||
| Compression ratio | 17.7 | p. 19 |
| most models (200±5 kgf/cm² for 3JH3(B)(C)E on p18) | ||
| Fuel injection pressure | 21.6±0.5 kgf/cm² | p. 19 |
