Part of the Yanmar Operator Manuals.
Air trapped in the fuel lines will keep a JH series diesel cranking all day without a single fire, and the bleeding procedure that ends it lives in the Before You Operate section of this manual. Yanmar issued it as publication 0AJHM-M00201 for the 3JH5E, 4JH5E, 4JH4-TE, 4JH4-HTE1 and 4JH4-HTE marine engines built from 2009 through 2013: 168 pages, in English.
It covers what keeps these engines alive between rebuilds: diesel fuel and engine oil specifications, coolant mixing limits, marine gear and sail drive oil checks, the periodic maintenance schedule, cold weather starting, long-term storage, and a troubleshooting chart keyed to symptoms. A full set of piping and wiring diagrams closes out the book.
Guess at a coolant mix or stretch a filter interval and the price is a cooked cylinder head or a dead engine a long way from the slip. The PDF carries 131 bookmarks, so the procedure you need is two clicks from the cover.
What's Inside This Yanmar 3JH5E / 4JH5E Series Operator Manual
| System | Pages | Key Topics |
|---|---|---|
| JH5_English | 3-4 | Major Components, Control Equipment, Engine Operation, Periodic Maintenance, Specifications, System Diagrams |
| Introduction | 9-12 | Jh Series Emission Control System Warranty-USA, The Environmental Protection Age, Record of Ownership |
| Safety | 13-22 | Safety Precautions (Before You Operate, During Operation and Maintenance), Location of Safety Decals |
| Product Overview | 23-40 | Yanmar Jh Series Features and Applications (New Engine Break-In) |
| Before You Operate | 41-56 | Safety Precautions, Diesel Fuel (Specifications, Filling the Fuel Tank, Bleeding the Fuel System) |
| Engine Operation | 57-66 | Safety Precautions, Starting the Engine (If the Engine Fails to Start, Starting at Low Temperatures, After the Engine Has Started) |
| Periodic Maintenance | 67-96 | Safety Precautions |
| Troubleshooting | 97-100 | Safety Precautions, Troubleshooting After Starting, Troubleshooting Information, Troubleshooting Chart |
| Long-Term Storage | 101-104 | Prepare Engine for Long-Term Storage, Drain Seawater Cooling System, Returning the Engine to Service |
| Specifications | 105-114 | Principal Engine Specifications (3JH5E Marine Gears, 4JH5E Marine Gear or Sail Drive, 4JH4-Te, 4JH4-HTE1 and 4JH4-Hte Marine Gear or Sail Drive) |
| System Diagrams | 115-156 | Piping Diagrams, Wiring Diagrams |
| EPA Warranty Usa Only | 157-160 | Yanmar Co. |
| Emission System Warranty | 161-168 | Non-Road Emission System Warranty (Yanmar Co., Ltd. Limited Emission Control System Warranty - Usa Only, Maintenance Log) |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Fuel filter tightening torque | 20 to 24 N-m (14.75 to 17.7 ft-lb) | p. 80 |
| Fuel filter replacement interval | Every 250 hours of operation | p. 79 |
| Coolant concentrate minimum | 30% | p. 50 |
| Coolant concentrate maximum | 60% | p. 50 |
| Coolant Reservoir Capacity | 0.8 L | p. 46 |
| 3JH5E | ||
| 3JH5E Engine Displacement | 1.642 L | p. 98 |
| 3JH5E, 4JH5E | ||
| Engine Oil Capacity (Total) | 5.0 ± 0.3 L | p. 98 |
Yanmar 3JH5E / 4JH5E Series Common Problems This Manual Covers
Cranks steadily but never fires
After a filter change or a run-dry tank, air in the fuel system will stop any of these engines cold. The manual walks through filling the tank and bleeding the fuel system in the correct order, which beats cranking the battery flat.
Manual Section: Before You Operate p. 41Overheating under sustained load
A tired impeller or a neglected seawater side shows up as climbing temperature just when the engine is working hardest. The maintenance schedule sets the service intervals that keep the cooling system ahead of the failure, including fuel and filter work every 250 hours.
Manual Section: Periodic Maintenance p. 67Hard starting in cold weather
These diesels can be stubborn on a cold morning, and repeated failed attempts only make the fuel situation worse. The manual covers starting at low temperatures, what to do if the engine fails to start, and how to treat it once it catches.
Manual Section: Engine Operation p. 57Smoke, poor power, rough running
Excess smoke or a rough idle can trace back to fuel contamination, intake restriction, or valve trouble. The troubleshooting chart ties each symptom to its likely causes so you replace the right part instead of the nearest one.
Manual Section: Troubleshooting p. 97Corrosion damage after winter layup
Seawater left sitting in the cooling circuit over a layup eats the engine from the inside. The manual gives the full procedure for draining the seawater cooling system, preparing the engine for storage, and returning it to service.
Manual Section: Long-Term Storage p. 101Electrical faults and dead instrument panels
A dead gauge or a phantom alarm usually means tracing wiring in a cramped compartment. The wiring diagrams in this manual let you follow each circuit on paper before you start pulling looms apart.
Manual Section: System Diagrams p. 115Frequently Asked Questions
Which engines does this manual cover?
The Yanmar 3JH5E, 4JH5E, 4JH4-TE, 4JH4-HTE1 and 4JH4-HTE marine diesels from the 2009 to 2013 range, in marine gear and sail drive configurations. The Specifications section lists principal engine data for each model separately. p. 105
Does it include wiring and piping diagrams?
Yes. The System Diagrams section contains both piping diagrams and wiring diagrams for these engines, which is the material you want open when chasing an electrical or plumbing fault. p. 115
How often do the fuel filters need changing?
The Periodic Maintenance section calls for replacing the fuel filter element every 250 hours of operation (page 79) and gives a tightening torque of 20 to 24 N-m (14.75 to 17.7 ft-lb) for the new element (page 80). p. 67
What exactly do I receive with this Yanmar 3JH5E Operator Manual?
You get a 168-page searchable PDF (11 MB) that downloads instantly after checkout. Open it on your laptop, tablet, or phone, and bring it right to the shop floor.
Am I able to print pages from this manual?
Absolutely. No DRM or copy protection. Print the whole manual or just the pages you need. Any home or office printer works.
Is there a wiring diagram in this Yanmar 3JH5E Operator Manual?
Included. The Yanmar 3JH5E, 4JH5E, 4JH4-TE, 4JH4-HTE1, 4JH4-HTE Operator Manual provides a wiring diagram for the electrical system.
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