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 p. 24
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 IssuesOil leaking around the filter housing and pressure dropping after performing routine maintenance p. 34
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 ProblemsEngine performance falls off sharply or stalls completely immediately after refueling the tank p. 37
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 MalfunctionsLow oil pressure warning light flashes continuously on the instrument panel during normal operation p. 12
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 ProblemsFrequently Asked Questions
How to stop the alarm sound on the YANMAR 6LY(M)-UTE 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.
What are the YANMAR 6LY(M)-UTE 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.
What are the replacement specifications for the lube oil filter?
The lube oil filter should be replaced after the first 50 service hours. Subsequent replacements are required every 250 service hours or monthly to ensure proper lubrication system function.
What is the recommended lube oil capacity for the engine oil pan?
The full lube oil capacity for the engine oil pan is 20 liters. The effective capacity, which is the amount between the full and low marks on the dipstick, is 8 liters.
What is the specified fuel injection timing for the engine?
The specified fuel injection timing for the engine is 13° ± 1. This precise timing is critical for efficient combustion and optimal engine performance.
Document Quality
This document is a scanned PDF with an OCR layer, allowing you to search and copy the full text. The text quality is generally clear and readable, though some original scanned elements may show slight fading or minor artifacts. Diagrams and illustrations are raster images; their labels are mostly legible, but image sharpness can vary slightly upon zooming. Pages are largely clean, with typical scanning artifacts like minor skewing and faint background noise present on some pages. Page 4 is a dedicated "MEMO" page, which is mostly blank.
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