Part of the Yanmar Operator Manuals.
Keep your diesel engine running right with this 39-page Yanmar 6LY(M)-UTE, 6LY(M)-STE operator manual pdf (OEM #499613-02061), detailing daily maintenance for the 6LY(M)-UTEHD and 6LY(M)-UTE STE variants. Inside, you get a full breakdown of initial engine operation, complete fluid capacities, and step-by-step periodical check schedules. Open up to clear instructions on bleeding air from the fuel system, handling the marine gear clutch lever, and reading instrument panel indicators before a cold start. Swap out the fuel filter element every 250 service hours and confirm the engine fresh water volume is topped off at exactly 24 liters before leaving the dock. A blown motor from skipped maintenance ruins your whole season. Grab this bookmarked file, pull it up on your tablet down in the engine room, and keep your equipment running loud and strong.
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
Yanmar 6LY(M)-UTE temperature alarm sounds and engine runs hot under heavy load
Check the fresh water operating temperature. Verify the coolant stays within 75°C to 85°C for a new engine as specified on page 24. Inspect the seawater pump impeller and replace it if you exceed the 2500 service hours interval found on page 36.
Manual Section: Fresh Water Cooling System Issues p. 24Oil leaking around the filter housing and pressure dropping after performing routine maintenance
Inspect the lube oil filter seal for damage or improper seating. Replace the filter after the first 50 service hours as noted on page 34. Fill the oil pan to the 20 l full capacity listed on page 10 and verify there are no leaks during operation.
Manual Section: Engine Lubrication Problems p. 34Engine performance falls off sharply or stalls completely immediately after refueling the tank
Drain the water separator and inspect the entire fuel system for contamination. Change the fuel filter element every 250 service hours. Review the easy troubleshooting guide on page 37 to verify proper fuel delivery. Always use the specified diesel fuel to prevent poor combustion.
Manual Section: Fuel System Malfunctions p. 37Low oil pressure warning light flashes continuously on the instrument panel during normal operation
Stop the engine immediately and check the dipstick level. Adhere to the engine lube oil change interval on page 12, requiring fresh oil every 250 service hours. Ensure the system holds the full 20 l capacity shown on page 10 to maintain safe operating pressure.
Manual Section: Engine Lubrication Problems p. 12Frequently Asked Questions
How to stop the alarm sound on the instrument panel?
When the alarm sounds continuously, you can stop the sound by turning on the elimination switch. After activating the switch, verify that the elimination lamp of the tachometer is ON. p. 20
What are the torque specifications for the cylinder head bolts?
The specified tightening torque for the cylinder head bolts is 206 ± 9.8 N·m (21 ± 1kgf-m). This value is crucial for proper engine assembly and operation. p. 32
How quickly can I access this Yanmar 6LY(M)-UTE, 6LY(M)-UTEHD, 6LY(M)-STE?
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.
Am I able to print pages from this Yanmar 6LY(M)-UTE, 6LY(M)-UTEHD?
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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