The Yanmar 3TNV76 is a 1.12 L 3-cylinder naturally aspirated engine rated at 1800 rpm, producing up to 11 kW. It powers generator sets from Himoinsa, including the HYW 9 M6 and HYW 9 T6. It holds 0.9 L (0.2 gal) of coolant.
Also known as: 3TNV76, Yanmar 3TNV76
Part of the Yanmar 3TNV76 engine family — 3 variants share parts & fitment.
The cheapest captured merchant offer per filter — see the full cross-reference below for every OEM/aftermarket option.
Prices captured from merchant listings; some links are affiliate links. Verify against your serial number before ordering.
| Coolant capacity | 0.9 L |
|---|---|
| Displacement | 1.12 L |
| Cylinders | 3 |
| Aspiration | Naturally aspirated |
| Rated speed | 1800 rpm |
| Gross power | 11 kW |
Compiled from service & troubleshooting documentation across every generator set that uses the Yanmar 3TNV76.
| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | — | ||||
| Fuel filter | 11981055650 | Amazon Amazon eBay $10.99 eBay $17.99 KuduParts $11.00 | |||
| Oil filter | 12445035110 | Amazon eBay $7.50 PartsGeek $8.97 KuduParts $11.00 | |||
| Battery | — | ||||
| Belt | — | ||||
| Coolant | — | ||||
| Oil | 3.5 qt | — | |||
| Spark plug | — |
Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.
Step-by-step procedures compiled from the Yanmar service manual for this engine.
| Item | Action | Hours | Months | Notes |
|---|---|---|---|---|
| Battery electrolyte level check and battery recharging | Check | 50 hr | ||
| Bleeding the fuel system | Other | 50 hr | Bleed air | |
| Fuel tank draining | Drain | 50 hr | ||
| V-belt tension check | Check | 250 hr | 3 mo | First service — Initial 50 hours |
| Water separator draining | Drain | 50 hr | ||
| Air cleaner cleaning and element replacement | Clean | 250 hr | 3 mo | Replace element if damaged, excessively dirty, or oily |
| Governor lever and accelerator inspection and adjustment | Adjust | 250 hr | 3 mo | |
| Lube oil and filter replacement | Change | 250 hr | 3 mo | First service — Second replacement and thereafter |
| Radiator fin cleaning | Clean | 250 hr | 3 mo | |
| Air cleaner element replacement | Replace | 500 hr | 6 mo | Replace periodically even if not damaged or dirty |
| Fuel filter element replacement | Replace | 500 hr | 6 mo | |
| Water separator cleaning | Clean | 500 hr | 6 mo | |
| Cooling water replacement | Change | 1000 hr | 12 mo | |
| Diaphragm assy inspection | Inspect | 1000 hr | 24 mo | 1000 hours or 2 years |
| Fuel injection nozzle pressure inspection | Test | 1000 hr | 12 mo | |
| Intake/exhaust valve clearance adjustment | Adjust | 1000 hr | 12 mo | |
| Cooling water path flushing and maintenance | Clean | 2000 hr | 24 mo | |
| Fuel injection pump inspection and adjustment | Adjust | 2000 hr | 24 mo | |
| Fuel injection timing adjustment | Adjust | 2000 hr | 24 mo | |
| Fuel pipe and cooling water pipe inspection and maintenance | Inspect | 2000 hr | 24 mo | Replace rubber hoses at least every 2 years |
| Intake/exhaust valve seat lapping | Other | 2000 hr | 24 mo | Lap valve seat |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
| Type | Item | Value | Unit | Condition |
|---|---|---|---|---|
| Clearance | Cam height, 2/3TNV70 | 34.535-34.665 | mm | limit 34.29 |
| Clearance | Cam height, 3TNV76 | 34.135-34.265 | mm | limit 33.89 |
| Clearance | Camshaft bend | 0-0.02 | mm | limit 0.05 |
| Clearance | Camshaft side gap | 0.05-0.15 | mm | limit 0.25 |
| Clearance | Connecting rod big end clearance | 0.020-0.058 | mm | limit 0.120 |
| Clearance | Connecting rod small end clearance | 0.025-0.047 | mm | limit 0.105 |
| Clearance | Crankshaft crankpin oil clearance | 0.020-0.050 | mm | limit 0.110 |
| Clearance | Crankshaft crankpin outside diameter | 41.952-41.962 | mm | limit 41.902 |
| Clearance | Crankshaft journal oil clearance | 0.020-0.050 | mm | limit 0.120 |
| Clearance | Crankshaft journal outside diameter | 46.952-46.962 | mm | limit 46.902 |
| Clearance | Crankshaft side gap | 0.111-0.250 | mm | |
| Clearance | Cylinder head combustion surface distortion | 0.05 or less | mm | limit 0.15 |
| Clearance | Exhaust valve stem clearance | 0.040-0.067 | mm | limit 0.17 |
| Clearance | Exhaust valve stem outside diameter | 5.945-5.960 | mm | limit 5.90 |
| Clearance | Gear backlash | 0.06-0.12 | mm | limit 0.14 |
| Clearance | Idle gear clearance | 0.025-0.075 | mm | limit 0.175 |
| Clearance | Intake valve stem clearance | 0.025-0.052 | mm | limit 0.16 |
| Clearance | Intake valve stem outside diameter | 5.960-5.975 | mm | limit 5.90 |
| Clearance | Oil pump inner rotor centering clearance | 0.13-0.20 | mm | limit 0.25 |
| Clearance | Oil pump outer rotor outside clearance | 0.12-0.21 | mm | limit 0.30 |
| Clearance | Oil pump outer rotor side clearance | 0.02-0.07 | mm | limit 0.12 |
| Clearance | Piston pin clearance | 0.000-0.014 | mm | limit 0.074 |
| Clearance | Rocker arm clearance | 0.016-0.054 | mm | limit 0.13 |
| Clearance | Tappet clearance | 0.040-0.094 | mm | limit 0.134 |
| Clearance | Thrust metal thickness | 1.930-1.980 | mm | limit 1.850 |
| Clearance | Valve guide inside diameter | 6.000-6.012 | mm | limit 6.08 |
| Gap | Valve guide projection from cylinder head | 9.8-10.0 | mm | |
| Gap | Valve stem seal projection | 10.9-11.2 | mm | |
| Injection timing | Fuel injection timing FID | 15/16/18/21/20/21 | deg bTDC | varies by model/class and speed; see table |
| Other | Cylinder inside diameter, 2/3TNV70 | 70.000-70.030 | mm | limit 70.200 |
| Other | Cylinder inside diameter, 3TNV76 | 76.000-76.030 | mm | limit 76.200 |
| Other | Piston outside diameter, 2/3TNV70 | 69.960-69.990 | mm | limit 69.915 |
| Other | Piston outside diameter, 3TNV76 | 75.955-75.985 | mm | limit 75.910 |
| Pressure | Compression pressure, 2/3TNV70 limit | 2.55±0.1 | MPa | at 250 min-1; 26±1 kgf/cm2 |
| Pressure | Compression pressure, 2/3TNV70 standard | 3.24±0.1 | MPa | at 250 min-1; 33±1 kgf/cm2 |
| Pressure | Compression pressure, 3TNV76 limit | 2.75±0.1 | MPa | at 250 min-1; 28±1 kgf/cm2 |
| Pressure | Compression pressure, 3TNV76 standard | 3.43±0.1 | MPa | at 250 min-1; 35±1 kgf/cm2 |
| Pressure | Cooling water leak test pressure | 0.09±0.015 | MPa | 0.9±0.15 kgf/cm2 |
| Pressure | Fuel injection pressure | 11.8-12.8 | MPa | 120-130 kgf/cm2 |
| Pressure | Lube oil pressure at low idle speed | 0.06 or above | MPa | 0.6 kgf/cm2 or above |
| Pressure | Lube oil pressure at rated speed | 0.29-0.44 | MPa | 3.0-4.5 kgf/cm2 |
| Pressure | Oil pressure switch operating pressure | 0.05±0.01 | MPa | 0.5±0.1 kgf/cm2 |
| Pressure | Radiator cap opening pressure | 0.09±0.015 | MPa | 0.9±0.15 kgf/cm2 |
| Temperature | Thermo switch actuating temperature | 107-113 | °C | |
| Temperature | Thermostat valve opening temperature | 69.5-72.5 | °C | |
| Torque | Bearing cap set bolt | 75.5-81.5 | N·m | apply oil |
| Torque | Connecting rod bolt | 22.6-27.5 | N·m | apply oil |
| Torque | Crankshaft pulley set bolt, FC250 pulley | 83.3-93.3 | N·m | FC250; apply oil |
| Torque | Crankshaft pulley set bolt, S48C pulley | 113-123 | N·m | S48C; apply oil |
| Torque | Cylinder head bolt, first step | 26.0-30.0 | N·m | first step; apply oil |
| Torque | Cylinder head bolt, second step | 53.9-57.9 | N·m | second step; apply oil |
| Torque | Flywheel set bolt | 80.4-86.4 | N·m | apply oil |
| Torque | Fuel injection nozzle nut | 49.0-53.0 | N·m | no oil |
| Torque | Fuel injection pipe sleeve nut | 29.4-34.4 | N·m | no oil |
| Torque | Fuel pump drive gear nut | 58.8-68.8 | N·m | apply oil |
| Torque | Fuel pump gear bolt | 32.3-36.3 | N·m | no oil |
| Torque | Governor weight support nut | 68.7-73.7 | N·m | apply oil |
| Torque | Lube oil pump cover | 5.9-7.9 | N·m | apply oil |
| Torque | Oil filter | 20-24 | N·m | tighten 3/4 turn after contact |
| Valve clearance | Intake/exhaust valve clearance | 0.15-0.25 | 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.
| Fluid | Grade | Standard | Ambient | Capacity | Notes |
|---|---|---|---|---|---|
| Coolant | Long Life Coolant Antifreeze (LLC) mixed with clean soft water | Capacity engine only: 2TNV70 0.6 L; 3TNV70/3TNV76 0.9 L. Examples: TEXACO LONG LIFE COOLANT ANTIFREEZE product codes 7997 and 7998; HAVOLINE EXTENDED LIFE ANTIFREEZE/COOLANT product code 7994. Replace every year. | |||
| Engine oil | SAE 10W-30 or 15W-40 | API class CD or CF | 2TNV70 total 1.7 L/effective 0.7 L; 3TNV70 VM/VH total 2.8 L/effective 1.3 L; 3TNV70 CH total 3.8 L/effective 1.7 L; 3TNV76 VM/VH total 3.5 L/effective 1.6 L; 3TNV76 CH total 4.4 L/effective 2.1 L | ||
| Fuel | Diesel oil, BS 2869 A1 or A2; cetane No. 45 min. | BS 2869 A1 or A2; JIS K2204-2 equivalent; US No.2 diesel fuel oil |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Tools: thickness gauge, wrench
Tools: thumb pressure 98 N
Tools: compression gage kit, compression gage adapter
⚠ Wear protective glasses when testing injection.
Tools: nozzle tester
Tools: thermometer, container
⚠ Wear protective equipment such as goggles when blowing compressed air.
Tools: compressed air
⚠ Do not bleed using the starting motor.
Tools: screwdriver
⚠ Never open radiator filler cap while engine and radiator are hot.
⚠ Hot oil can cause burns.
Tools: wrench, filter wrench, socket wrench or closed wrench
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
| Part # | Description | Category |
|---|---|---|
| 3TNV76 | Oil Filter | Oil filter |
| ALR190-I03 | ALR Series Linear Actuator | Service part / kit |
| ALR190-M04 | ALR Series Linear Actuator | Service part / kit |
Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.
Parts listed by aftermarket suppliers as fitting this engine — leads compiled from supplier catalogs; verify the exact part for your serial number.
Cross-referenced via Donaldson + OEM/engine-maker interchange — options to verify against your serial number, not confirmed for every exact variant.
Other equipment known to use this engine, via filter-application cross-reference — useful for sourcing parts even when your exact machine isn't listed elsewhere on this page.
The Yanmar 3TNV76 has a displacement of 1.12 liters with 3 cylinders.
The Yanmar 3TNV76 powers 2 generator set(s), including Himoinsa HYW 9 M6, Himoinsa HYW 9 T6.
The Yanmar 3TNV76 uses oil filter part numbers Yanmar 12445035110, Donaldson P502016, Donaldson P552849.
The Yanmar 3TNV76 uses fuel filter part numbers Yanmar 11981055650, Donaldson P502166, Donaldson P550094.
The Yanmar 3TNV76 uses air filter part numbers Yanmar 12908712510, Yanmar 11965512560L, Yanmar 12906212560L.
A commonly reported issue on generators using the Yanmar 3TNV76 is: Oil Pressure Monitoring — compressor automatically shuts off when oil pressure decreases below the minimum pressure of +0.5 bar; the red warning lamp "Oil Pressure Monitoring" lights up. Cause: Wrong compressor rotation direction (see rotation direction arrow).