Part of the Yanmar Operator Manuals.
The first time a BY3 dies from a clogged fuel filter, the bleed sequence is what stands between a ten minute fix and an afternoon of cranking on a dead battery. This 96 page Yanmar operation manual, publication 0ABY0-G00301, covers the 4BY3-150, 4BY3-150Z, 4BY3-180, 4BY3-180Z, 6BY3-220, 6BY3-220Z, 6BY3-260 and 6BY3-260Z marine diesels, four and six cylinder versions of the same 84 mm x 90 mm block.
It walks through diesel fuel and oil specifications, bleeding the fuel system, starting at low temperatures, the full periodic maintenance schedule, troubleshooting charts for alarms and starting failures, and draining the seawater cooling system before storage. The Specifications section carries the numbers you otherwise end up guessing at: oil and coolant capacities, battery rating, idle speed.
Guessing an oil quantity or an anode torque is cheap right up until it isn't. Download it once and it is yours to keep, search and print for as long as the engine runs.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| Introduction | 7-8 | Record of Ownership |
| Safety | 9-18 | Safety Precautions (Before You Operate, During Operation and Maintenance), Safety Decals |
| Product Overview | 19-28 | Yanmar BY3-Series Features and Applications, New Engine Break in |
| Before You Operate | 29-42 | Safety Precautions, Diesel Fuel (Specifications, Filling the Fuel Tank, Bleeding the Fuel System) |
| Engine Operation | 43-46 | Safety Precautions, Starting the Engine (Starting at Low Temperatures), Shutting Down the Engine, Emergency Shut Down, Checking the Engine After Operation |
| Periodic Maintenance | 47-68 | Safety Precautions |
| Troubleshooting | 69-80 | Safety Precautions, Troubleshooting After Starting, Troubleshooting Information |
| Long-Term Storage | 81-82 | Prepare Engine for Long-Term Storage, Draining the Seawater Cooling System |
| Specifications | 83-86 | Engine Specifications |
| EPA Warranty Usa Only | 87-96 | Yanmar Co. |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Zinc anode torque | 25 N·m (18 ft-lb) | p. 64 |
| Coolant temp alarm threshold | Over 110 °C (230 °F) | p. 77 |
| Maximum continuous operation at low idle or low speed and light load | 30 minutes at a time | p. 20 |
| Engine Oil Change Interval (after initial 50 hours) | 250 hours | p. 48 |
| M4 Hex bolt torque (grade 8.8 or 8) | 2.7 N·m (24 in.-lb) | p. 49 |
| M12 Hex bolt torque (grade 12.9 or 12) | 135 N-m (100 ft-lb) | p. 49 |
| 5 mm Hex head hose clamp torque | 1.0 - 1.5 N·m (8.9 - 13 in.-lb) | p. 49 |
| Bore x stroke | 84 mm x 90 mm (3.307 in. x 3.543 in.) | p. 83 |
| Compression ratio | 16.5:1 | p. 83 |
| 4BY3-150/150Z, 4BY3-180/180Z | ||
| Coolant capacity (approximate) | 10 l (10.6 qt) | p. 84 |
| 4BY3-150, 4BY3-150Z, 4BY3-180, 4BY3-180Z | ||
| Number of cylinders (4BY3-150, 4BY3-150Z, 4BY3-180, 4BY3-180Z) | 4 | p. 83 |
| 6BY3-220, 6BY3-220Z, 6BY3-260, 6BY3-260Z | ||
| Number of cylinders (6BY3-220, 6BY3-220Z, 6BY3-260, 6BY3-260Z) | 6 | p. 83 |
