Looking to master the daily operation of your Yanmar BY-Series marine engine? This 80-page Yanmar 6by operator manual pdf (OEM #0ABY0-G00101) delivers the exact factory instructions for the 4BY and 6BY models. Inside, you get a full breakdown of periodic maintenance schedules, emergency shut-down procedures, and complete diagnostic trouble codes to decode dashboard alarms. Open up the daily check section to find step-by-step guidance on bleeding the fuel system and verifying power steering fluid levels. Keep your engine running clean by swapping the fuel fine filter every 250 hours, and make sure to tighten the 5mm hex head hose clamps to exactly 1.0 - 1.5 N·m. Don't let a mystery dashboard alarm ruin your day on the water. Grab this natively bookmarked PDF, save it directly to your phone, and keep your marine engine running strong.
What's Inside This Yanmar 4BY150/150Z, 4BY180/180Z, 6BY220/220Z, 6BY260/260Z Operator Manual
| System | Pages | Key Topics |
|---|---|---|
| Introduction | 7-8 | Record of Ownership |
| Safety | 9-14 | Safety Precautions (Before You Operate, During Operation and Maintenance), Safety Decals |
| Product Overview | 15-24 | Yanmar BY-Series Features and Applications, New Engine Break in |
| Before You Operate | 25-36 | Diesel Fuel (Specifications, Filling the Fuel Tank, Bleeding the Fuel System), Engine Oil (Specifications, Acceptable Engine Oil, Checking Engine Oil, Adding Engine Oil) |
| Engine Operation | 37-40 | Starting the Engine, Starting at Low Temperatures, Shutting Down the Engine, Emergency Shut Down, Checking the Engine After Operation |
| Periodic Maintenance | 41-60 | Safety Precautions |
| Troubleshooting | 61-70 | Troubleshooting Chart (Starting Trouble, Exhaust Color, Vibration - Drive Disengaged, Vibration - Drive Engaged, Engine Knocks, Low Power Output, Engine Overheat, Engine Runs Cold, Coolant Loss) |
| Long-Term Storage | 71-72 | Prepare Engine for Long-Term Storage, Draining the Seawater Cooling System |
| Specifications | 73-76 | Engine Specifications, Tightening Fasteners |
| Epa Warranty Usa Only | 77-80 | Yanmar Co. |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Fuel fine filter replacement interval | Every 250 hours or one year whichever comes first | p. 46 |
| Fuel filter / water separator element replacement interval | Every 250 hours or one year whichever comes first | p. 46 |
| Engine oil filter replacement interval (initial) | Initial 50 hours | p. 46 |
| Engine oil filter replacement interval (subsequent) | Every 250 hours or one year whichever comes first | p. 46 |
| Seawater pump impeller replacement interval | Every 500 hours or 2 years whichever comes first | p. 46 |
| Seawater pump impeller replacement interval (long-term) | Every 2000 hours or 8 years whichever comes first | p. 59 |
| Seawater filter inspection interval | Daily | p. 46 |
| Seawater filter inspection interval (periodic) | Every 50 hours or monthly whichever comes first | p. 46 |
| Zinc anodes replacement interval | Every 250 hours or one year whichever comes first | p. 46 |
| Zinc anodes replacement criteria | Any anode having less than half its original size remaining should be replaced | p. 48 |
| Seawater pump belt inspection/replacement interval | Every 250 hours or one year whichever comes first | p. 47 |
| Alternator belt inspection/replacement interval | Every 250 hours or one year whichever comes first | p. 46 |
Yanmar 4BY150/150Z, 4BY180/180Z, 6BY220/220Z, 6BY260/260Z Common Problems This Manual Covers
Yanmar 4BY marine engine cranks but will not start after sitting or fuel filter change p. 25
Bleed the fuel system as described on page 25. Check the fuel fine filter replacement interval of 250 hours. Verify the 6mm hex head hose clamps are tightened to 2.5 - 3.5 N·m (22 - 31 in.-lb) on page 76 to prevent air leaks.
Manual Section: Before You OperateInstrument shows high temperature and cooling-water discharge is significantly reduced or absent at the exhaust p. 50
Inspect the seawater pump impeller on page 50. Replace the impeller if worn, or according to the long-term interval of 2000 hours on page 59. Check the seawater filter daily for blockages and ensure the coolant capacity is correct for your specific model.
Manual Section: Periodic MaintenanceWarning light flashing on instrument panel and engine turns over slowly during cold weather startup p. 61
Check the troubleshooting chart on page 61. Verify the battery terminals are clean and tight. Test the charging system output to ensure it produces 12 V / 150 A as specified on page 74. Inspect all sensor connections for corrosion or damage.
Manual Section: TroubleshootingExcessive corrosion observed on cooling system components and sacrificial zinc anodes require routine replacement p. 48
Inspect the zinc anodes as directed on page 48. Replace any anode having less than half its original size remaining. Install the new anodes and torque the retaining bolts to 25 N·m (18 ft-lb) using the specifications found on page 55.
Manual Section: Periodic MaintenanceFrequently Asked Questions
How to reset Yanmar 4BY/6BY engine alarm?
For some conditions, a warning alarm will be canceled if the engine is turned off and then restarted. However, if any indicator illuminates during engine operation, the engine should be stopped immediately to determine the cause and repair the problem. For persistent alarms or if the alarm window fails to display correctly, it is recommended to contact an authorized Yanmar marine dealer or distributor.
What does Yanmar BY-series error code mean?
The Yanmar BY-series error codes, referred to as Diagnostic Trouble Codes (DTCs), are detailed in the Diagnostic Trouble Code Table on pages 66-69. This table provides information on the specific Part or System affected, the Mode of failure, the Run or Condition, whether the Engine Can Start, and if a Check Engine Alarm is triggered. For example, code P0001 indicates a 'Fuel Metering Unit' that is 'Not connected'.
How to clear Yanmar ECM fault codes?
To read and correct Diagnostic Trouble Codes (DTCs), a special tool is used by a technician. The manual does not provide a user-initiated procedure to reset or clear ECM fault codes; a technician is required to diagnose and correct the fault.
how to reset yanmar 6by220 fault code
To read and correct Diagnostic Trouble Codes (DTCs), a special tool is used by a technician. The manual does not provide a user-initiated procedure to reset or clear ECM fault codes; a technician is required to diagnose and correct the fault.
How will I receive this Yanmar 4BY, 6BY Operator Manual?
Immediate download of the complete 80-page searchable Operator Manual. Access it on any device, from a laptop at your desk to a phone in the field.
Is this Yanmar 4BY, 6BY Operator Manual printable?
Yes. The PDF has no DRM restrictions, so print any page or section you need for your shop. Works with any standard printer.
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