Part of the Yanmar Operator Manuals.
Rocker cover off, feeler gauges out, and the one number you need is the cold valve lash. This 39 page Yanmar operator manual for the 6LY(M)-UTE, 6LY(M)-UTEHD, and 6LY(M)-STE diesel engines has it, along with the cylinder head bolt torque, fuel injection start pressure, and the lube oil pressure the gauge should hold once everything is back together.
The manual walks through engine specifications, fuel and lube oil selection, first start of a new engine, daily operation, marine gear handling, and a full schedule of periodical checks and service. An easy troubleshooting guide and system diagrams close it out, so a rough idle or a climbing temperature gauge does not cost you an afternoon of guessing.
It is the factory publication (499613-02061), delivered as a PDF download in English. Print the pages you need and keep them at the bench while the engine is apart.
What's Inside This Yanmar 6LY(M)-UTE, 6LY(M)-UTEHD, 6LY(M)-STE, 6LY(M)-UTE STE Operator Manual
| System | Pages | Key Topics |
|---|---|---|
| Name of Parts | 9 | Lube Oil Cooler, Lube Oil Filter, Fuel Oil Filter, Inter Cooler, Turbocharger, Seawater Pump |
| Engine Specifications | 10 | Type, No. of Cylinders, Continuous Rating Output, Max. Rating Output, Fuel Injection Timing, Cooling System |
| Precautions | 11-15 | Fuel Oil, Lube Oil, Cooling Water, Exhaust Gas, Battery, Turbocharger |
| Fuel and Lube Oil | 16 | Selection of Fuel, Handling of Fuel, Selection of Lube Oil |
| Initial Operation of New Engine | 17-22 | Fuel Supply, Lube Oil Supply, Cooling Water Supply, Bleeding Air, Remote Control Unit, Instrument Panels |
| Operation | 23-26 | Engine Starting, Remote Control, Cooling Water, Exhaust Smoke, Clutch Lever, Engine Stopping |
| Handling the Marin Gear | 27-28 | Clutch Lever, Emergency Bolts, Lube Oil System, Bearings, Friction Plate, Remote Control Cable |
| Periodical Checks and Service | 29-36 | Fuel System, Lube Oil System, Cooling Water System, Electrical Parts, Turbocharger, Marine Gear |
| Easy Troubleshooting Guide | 37 | - |
| System Diagrams | 38-39 | - |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Cylinder head bolt torque | 206 ± 9.8 N·m (21 ± 1kgf-m) | p. 32 |
| Nozzle fastening nut torque | 3.9~4.9 Nm (0.4-0.5 ± 1kgf-m) | p. 32 |
| Fuel injection valve securing nut torque | 0.7~0.9 kg-m | p. 14 |
| Fuel filter element replacement interval | 250 service hours | p. 11 |
| Engine fresh water volume | 24 l | p. 10 |
| Subtank fresh water volume | 0.8 l | p. 10 |
| Fresh water operating temperature (new engine) | 75°C to 85°C | p. 24 |
| Fresh water operating temperature (general) | not rise above 90°C | p. 24 |
| Engine Lube Oil Capacity (Oil pan Full/Effective) | 20 l / 8 l | p. 10 |
| Clutch Lube Oil Capacity (Full/Effective) | 3.5 l / 0.3 l | p. 10 |
| Engine Fresh Water Capacity | 24 l | p. 10 |
| Idling Speed | 700 ± 25 rpm | p. 10 |
Yanmar 6LY(M)-UTE, 6LY(M)-UTEHD, 6LY(M)-STE, 6LY(M)-UTE STE Common Problems This Manual Covers
Power drops off and will not recover
A fouled turbocharger air inlet or restricted intake path bleeds output away until it is cleaned. The Periodical Checks and Service section covers turbocharger care along with the fuel, lube oil, and cooling water systems on the same schedule.
Manual Section: Periodical Checks and Service p. 29Fresh water temperature keeps climbing
The manual states fresh water must not rise above 90 degrees C during operation, with 75 to 85 degrees C expected on a new engine. The Operation section covers cooling water checks during running, exhaust smoke, and correct stopping procedure.
Manual Section: Operation p. 23Slow cranking and hard starting
Low battery electrolyte specific gravity or an undercharged battery shows up first as weak cranking. The Precautions section covers battery handling alongside fuel oil, lube oil, cooling water, and turbocharger cautions.
Manual Section: Precautions p. 11Rough running after taking on fuel
Contaminated or non recommended fuel degrades performance and can take out injection components. The Fuel and Lube Oil section covers selection and handling of fuel and the correct lube oil choice.
Manual Section: Fuel and Lube Oil p. 16Engine will not fire after fuel work
Air trapped in the fuel system after a filter change or a run dry tank keeps the engine from lighting off. The Initial Operation of New Engine section covers fuel supply, lube oil and cooling water fill, and bleeding air from the system.
Manual Section: Initial Operation of New Engine p. 17Marine gear clutch slips or drags
Worn friction plates, low gear lube oil, or a misadjusted remote control cable all show up at the clutch lever first. The Handling the Marin Gear section covers the clutch, emergency bolts, bearings, and the gear lube oil system.
Manual Section: Handling the Marin Gear p. 27Frequently Asked Questions
Which Yanmar engines does this manual cover?
It covers the Yanmar 6LY(M)-UTE, 6LY(M)-UTEHD, and 6LY(M)-STE diesel engines, including marine gear handling. It is factory publication 499613-02061, written in English.
Does it include valve clearance and torque specifications?
Yes, as check and setting values. The Periodical Checks and Service section lists the cold valve clearance (intake 0.1 ± 0.05 mm), the cylinder head bolt torque of 206 ± 9.8 N·m (21 ± 1 kgf-m) on page 32, the fuel injection start pressure and the normal lube oil pressure. It is a 39-page operator manual, so expect the figures you check against, not workshop-level procedures. p. 29
What oil and coolant capacities does it give?
The Engine Specifications section lists lube oil capacity for the oil pan at 20 l full and 8 l effective, engine fresh water volume of 24 l plus a 0.8 l subtank, and idling speed of 700 ± 25 rpm. p. 10
Is there a troubleshooting section?
Yes. The Easy Troubleshooting Guide gives symptom based checks for common running faults, and the System Diagrams that follow it help you trace the fuel, lube oil, and cooling water circuits while diagnosing. p. 37
How quickly can I access this Yanmar 6LY(M)-UTE manual after buying?
Instant PDF download (2 MB). You get the full 39-page searchable Operator Manual immediately after payment. Open it on your laptop, tablet, or phone right in the shop.
Are there any print restrictions on this Yanmar 6LY(M)-UTE manual?
Absolutely. No DRM or copy protection. Print the whole manual or just the pages you need. Any home or office printer works.
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