Service parts for the 6LY2-STE
Grouped by system, with how many of each the parts manual calls for.
Air intake
1 requiredOil system
1 requiredPrices captured from merchant listings; some links are affiliate links. Confirm against your serial number before ordering.
Specifications
| Alternator | Hitachi LR180-03B |
|---|
Engine
| Coolant capacity | 20.0 L |
|---|---|
| Aspiration | Turbocharged (RHC7W) |
| Rated speed | 3300 rpm |
Maintenance & consumables
for the Yanmar 6LY2-STE/6LY2A-STP/6LYA-STP| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | governor weight assembly | HINSHI-H8011 | Amazon eBay | ||
| Fuel filter | — | ||||
| Oil filter | lube oil filter | 119593-35100 | Amazon eBay $34.95 KuduParts $43.00 FridayParts $45.00 | ||
| Battery | — | ||||
| Belt | — | ||||
| Coolant | — | ||||
| Oil | — | 250 hr | |||
| Spark plug | — |
Service intervals
11| Item | Action | Hours | Months | Notes |
|---|---|---|---|---|
| Lube oil filter | Replace | 250 hr | First service — First time 50 hrs | |
| Fuel filter element | Replace | 300 hr | Replace element every 300 hours of operation | |
| Thermostat | Inspect | 500 hr | Normally inspected every 500 hours | |
| Oil filter | Replace | 1000 hr | Marine gear; replace filter element every 1000 hrs | |
| Rotor rotation | Check | 1500 hr | 6 mo | Turbocharger; every 6 months or 1500 operating hrs |
| Fuel injection timing | Check | 2000 hr | Every 2000 service hrs | |
| Thermostat | Replace | 2000 hr | 12 mo | Replace every year or 2000 hours, whichever comes first |
| Rotor play | Check | 3000 hr | 12 mo | Turbocharger; every 12 months or 3000 operating hrs |
| Oil cooler | Clean | 5000 hr | Marine gear; clean inside of cooling pipe and cooler every 5000 hrs | |
| Turbocharger entire supercharger | Inspect | 6000 hr | 24 mo | Disassembly, cleaning and checking; every 24 months or 6000 operating hrs |
| Rubber block | Check | 24 mo | Marine gear; check for cracks and wear visually every 2 years |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Service specifications
38| Type | Item | Value | Unit | Condition |
|---|---|---|---|---|
| Clearance | Camshaft side gap | 0.05~0.20 | mm | |
| Clearance | Connecting rod side clearance | 0.20~0.40 | mm | |
| Clearance | Crank journal and bearing oil clearance | 0.036~0.093 | mm | |
| Clearance | Crank pin and bearing oil clearance | 0.036~0.093 | mm | |
| Clearance | Crankshaft side gap | 0.132~0.223 | mm | |
| Clearance | Idle shaft and bushing oil clearance | 0.025~0.075 | mm | |
| Clearance | Piston pin and bearing oil clearance | 0.030~0.061 | mm | |
| Clearance | Rotor axial play | 0.06~0.09 | mm | maintenance standard; limit 0.110 mm |
| Clearance | Rotor radial play | 0.11~0.18 | mm | maintenance standard; limit 0.215 mm |
| Clearance | Top clearance | 0.70~0.90 | mm | |
| Clearance | Top clearance | 0.71~0.89 | mm | |
| Clearance | Valve rocker arm shaft and bushing clearance | 0.012~0.061 | mm | at assembly |
| Injection timing | Fuel injection timing | 13°±1° | bTDC | FID |
| Injection timing | Fuel injection timing | 15°±1° | bTDC | FID |
| Pressure | Nozzle opening pressure | 25.5~26.5 | MPa | 260~270 kgf/cm² |
| Pressure | Nozzle opening pressure | 28.4~29.4 | MPa | 290~300 kgf/cm² |
| Pressure | Oil pressure regulating valve setting pressure | 0.490±0.049 | MPa | 3000 rpm, oil temp 85°C |
| Speed | High idling | 3720±25 | rpm | |
| Speed | Low idling | 700±25 | rpm | |
| Temperature | Thermostat full open temperature | 85 | °C | |
| Temperature | Thermostat valve open temperature | 71±2 | °C | |
| Torque | Connecting rod bolt | 13.5~14.5 | kgf·m | |
| Torque | Crank V-pulley bolt | 226±10 | N·m | |
| Torque | Cylinder head bolts | 118 / 177 / 216~236 | N·m | First / Second / Final |
| Torque | Cylinder head bolts | 12 / 18 / 22.0~24.0 | kgf·m | First / Second / Final |
| Torque | Exhaust manifold bolt | 25±2 | N·m | |
| Torque | Flywheel bolt | 294±10 | N·m | |
| Torque | Main bearing cap bolt | 25~27 | kgf·m | |
| Torque | Metal cap bolt | 255±10 | N·m | |
| Torque | Nozzle nut | 10~12 | N·m | |
| Torque | Nozzle nut | 3.9~4.9 | N·m | |
| Torque | Rod bolt | 137±4.9 | N·m | |
| Torque | Timer nut | 127±10 | N·m | |
| Torque | Turbocharger V-band | 8.8 | N·m | final |
| Valve clearance | Exhaust valve clearance | 0.5 | mm | cold |
| Valve clearance | Exhaust valve clearance | 0.5±0.03 | mm | cold |
| Valve clearance | Intake valve clearance | 0.1 | mm | cold |
| Valve clearance | Intake valve clearance | 0.1±0.03 | mm | cold |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Recommended fluids
| Fluid | Grade | Standard | Ambient | Capacity | Notes |
|---|---|---|---|---|---|
| Coolant | Fresh water with Yanmar anti-rust agent; antifreeze in cold areas | below 5°C | 20.0 L | Cooling water capacity; subtank capacity 1.5 L | |
| Engine oil | Use only lube oil recommended by Yanmar | Engine lube oil capacities vary by model | |||
| Fuel | Diesel | Density at 15°C = 0.860; fuel oil temperature 25°C at fuel injection pump inlet | |||
| Hydraulic oil | API Service grade CD (#30) | 4.0 L | Marine gear KMH6A1 full capacity; effective 0.3 L |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Procedures
11Fuel injection nozzle adjustment adjustment
Tools: Nozzle tester
- Mount fuel injection nozzle on nozzle tester.
- Measure injection starting pressure.
- Adjust with shims to specified pressure.
- Check seat oil tightness.
- Check spray condition.
Valve clearance adjustment adjustment
Tools: Feeler gauge, Wrench
- Adjust when engine is cool.
- Measure intake clearance 0.1 mm and exhaust clearance 0.5 mm.
- Loosen lock nut and turn adjusting screw.
- Tighten lock nut.
- Recheck clearance.
Fuel injection timing check and adjustment diagnostic
- Remove high-pressure fuel pipe from fuel injection pump.
- Turn flywheel slowly by hand.
- Check fuel flow from delivery valve holder at specified timing.
- Check all cylinders.
- To advance timing, incline pump away from engine.
Fresh water pump inspection maintenance
Tools: Thickness gauge, Straight edge
- Rotate impeller smoothly; replace pump if not smooth or abnormal noise.
- Check impeller blade for damage or corrosion.
- Clean cooling water and bypass holes.
- Measure clearance between impeller and body: 0.3~1.1 mm.
- Measure clearance between impeller and plate.
Lube oil filter replacement maintenance
Tools: Filter wrench
- Remove lube oil filter with filter wrench.
- Clean filter mounting surface.
- Coat rubber packing with lube oil.
- Screw in until packing contacts, tighten about 3/4 turn.
- Run engine and check for oil leakage.
Thermostat testing maintenance
Tools: Thermometer
- Put thermostat in breaker with fresh water.
- Heat on electric stove.
- Check starts to open between 69.5~72.5°C.
- Check opens 8 mm or more at 85°C.
- Replace if not functioning normally.
Cylinder head assembly repair
Tools: Torque wrench
- Clean bolt holes and cylinder head surface.
- Coat head bolt threads and nut seats with lube oil.
- Install head gasket with positioning pins.
- Mount cylinder head.
- Tighten bolts in specified order.
- First 118 N·m, second 177 N·m, final 216~236 N·m.
Fuel injection pump disassembly repair
Tools: Box spanner, Screwdriver
- Wash outside of pump.
- Remove governor weight assembly.
- Remove fuel feed pump.
- Remove camshaft woodruff key.
- Remove bearing holder bolts.
- Pull out camshaft bearing holder.
- Remove camshaft.
- Remove roller guide parts.
- Remove control rack.
- Remove delivery valve holder.
- Remove delivery valve assembly.
- Remove plunger barrel.
Governor disassembly repair
Tools: Needle-nosed pliers, Box spanner, Wooden hammer
- Remove governor case cover.
- Remove angleich spring assembly.
- Remove governor case bolts.
- Remove connecting spring.
- Pull out link pin of fuel control rack.
- Remove governor lever shaft.
- Remove governor weight assembly.
Sea water pump disassembly repair
Tools: Pliers
- Remove rubber hose and pump assembly.
- Remove cover and take out O-ring, impeller, wear plate.
- Remove mechanical seal side stop ring.
- Remove bearing stop ring.
- Tap out pump shaft, bearings, drive gear.
- Remove oil seal and mechanical seal.
Turbocharger disassembly repair
⚠ Shaft end nut has left-hand thread
Tools: Box wrench 14 mm, TORX screwdriver, Copper bar, Stop ring pliers
- Mark match marks on housings.
- Disconnect boost hose.
- Remove blower wheel chamber.
- Remove shaft end nut (left-hand thread) and blower wheel.
- Remove turbine housing.
- Remove turbine shaft.
- Remove seal plate.
- Remove thrust bearing and thrust bush.
- Remove floating metal.
- Remove seal rings.
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Common questions
What engine is in the Yanmar 6LY2-STE?
The Yanmar 6LY2-STE is powered by the Yanmar 6LY2-STE/6LY2A-STP/6LYA-STP engine.
What is the cooling system capacity of the Yanmar 6LY2-STE?
The Yanmar 6LY2-STE cooling system holds 20 liters (5.3 US gallons) for the engine, per the manufacturer specification sheet.
What alternator comes on the Yanmar 6LY2-STE?
The Yanmar 6LY2-STE uses a Hitachi LR180-03B alternator.
What oil filter fits the Yanmar 6LY2-STE?
The Yanmar 6LY2-STE uses oil filter part number 119593-35100.
What air filter fits the Yanmar 6LY2-STE?
The Yanmar 6LY2-STE uses air filter part number HINSHI-H8011.
Troubleshooting
6Symptoms & remedies
| Symptom | Cause | Remedy |
|---|---|---|
| Exhaust gas is dense | Insufficient amount of suction air | Air cleaner element is clogged. © Replace or clean the element. Air take-in port is blocked up. © Remove obstruction. Air leaks at pipe connection. © Check and repair the pipe. |
| Supercharger does not operate | Impurities contained in oil precipitate at seal of turbine and hamper smooth rotation of turbine shaft.; Seizure of metal; Insufficient oil feed or clogging of pipe; Too high oil temperature; Imbalance in rotating part; Insufficient warm-up operation or abrupt stopping of operation under load (No-load operation) | 1) Impurities contained in oil precipitate at seal of turbine and hamper smooth rotation of turbine shaft. © Change the engine oil and disassemble and clean the turbocharger. 2) Seizure of metal © Disassemble and repair the turbocharger. 3) Insufficient oil feed or clogging of pipe © Check the engine oil system, and repair the trouble spot and at the same time change the oil. 4) Too high oil temperature © Check the engine oil system, and repair the trouble spot and at the same time change the oil. 5) Imbalance in rotating part © Replace or clean the rotating part. 6) Insufficient warm-up operation or abrupt stopping of operation under load (No-load operation) © Observe the operating precautions described in the operation manual. |
| Effect of exhaust gas resistance | Rotating speed does not pick up due to exhaust gas leak before the turbocharger.; Turbocharger fails to increase its speed due to deformation or blocked deformation or exhaust gas pipe. | 1) Rotating speed does not pick up due to exhaust gas leak before the turbocharger. © Check the pipe connection and repair as required. 2) Turbocharger fails to increase its speed due to deformation or blocked deformation or exhaust gas pipe. © Repair the pipe to normal state. |
| Whitish exhaust gas | Oil flows into blower side or turbine side due to clogged or deformed oil return pipe.; Seal ring is worn abnormally or broken due to excessive metal abrasion. | 1) Oil flows into blower side or turbine side due to clogged or deformed oil return pipe. © Repair or replace the pipe. 2) Seal ring is worn abnormally or broken due to excessive metal abrasion. © Dissemble and repair the turbocharger. |
| Too early oil shortage | Seal ring is worn abnormally or broken due to excessive metal abrasion. | 1) Seal ring is worn abnormally or broken due to excessive metal abrasion. © Disassemble and repair the turbocharger. |
| Output drop | Gas leaks at part(s) in exhaust gas system.; Air leaks at discharge side of blower.; Clogging of air cleaner element.; Turbocharger is contaminated or damaged. | 1) Gas leaks at part(s) in exhaust gas system. © Disassemble and repair the turbocharger. 2) Air leaks at discharge side of blower. © Disassemble and repair the turbocharger. 3) Clogging of air cleaner element. © Clean or replace the element. 4) Turbocharger is contaminated or damaged. © Disassemble and repair or replace the turbocharger. |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing. Full Yanmar 6LY2-STE troubleshooting guide (16 entries) →
Repair guides
11- Cylinder head assembly
- Fresh water pump inspection
- Fuel injection nozzle adjustment
- Fuel injection pump disassembly
- Fuel injection timing check and adjustment
- Governor disassembly
- Lube oil filter replacement
- Sea water pump disassembly
- Thermostat testing
- Turbocharger disassembly
- Valve clearance adjustment
Step-by-step procedures compiled from the Yanmar service manual for this model.
Parts
11| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 0.138 | Delivery capacity of one stroke | Delivery capacity of one stroke | buy | |
| 119593-35100 | lube oil filter | 1 | Oil filter | Amazon eBay $34.95 KuduParts $43.00 FridayParts $45.00 |
| 119593-35400 | lube oil filter | 1 | Oil filter | Amazon eBay $38.74 |
| 126650-92750 | Cap tester | 1 | Cap tester | Amazon eBay |
| 28.9708 | Baffle plate | Baffle plate | buy | |
| 45000kcag/h | Amount of heat | Amount of heat | buy | |
| 6LY2-STE | Adjusting shims, nozzle spring and nozzle spring seat | 1 | Service part / kit | Amazon eBay $25.00 FridayParts $945.00 |
| 97613846 | NPT v4 PLUG (SEA WATER) | 1 | Service part / kit | Amazon eBay |
| 97613852 | BOLT_UNC 3/8" | 1 | Service part / kit | Amazon eBay |
| HINSHI-H8011 | Angleich spring assembly | 1.0 | Service part / kit | Amazon eBay |
| HINSHLH8011 | Adjusting shim | Service part / kit | Amazon eBay |
Service, wear & replacement parts referenced for this model and its engine — confirm the exact part for your serial number. See the full parts catalog to search and cross-reference.
Available documents
Service manual — Yanmar-6LY2-STE-Service (Yanmar)
This page was generated from the 1 manufacturer document above by automated extraction; every figure shown is copied from one of them. How the data is compiled.