Yanmar 3TNE74 Specifications
| Engine Model: Yanmar 3TNE74 |
| Engine Type: 4-cycle 3-cylinder indirect injection liquid-cooled diesel |
| Total Displacement: 61.4 cu.in (1.01 L) |
| Rated Engine Power: 25.6 Hp (19.1 kW) at 3600 rpm |
| Aspiration Type: Naturally aspirated |
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Engine Model .......... Yanmar 3TNE74
Engine Type .......... Vertical four-cycle liquid-cooled diesel
Number of Cylinders .......... 3
Engine Bore, in (mm) .......... 2.92 (74.0)
Engine Stroke, in (mm) .......... 3.08 (78.0)
Displacement, cu.in (L) .......... 61.4 (1.006)
Engine Power, hp (kW) .......... 25.6 (19.1)
Engine Speed, rpm .......... 3600
Fast Idle Speed, rpm .......... 3475±25
Slow Idle Speed, rpm .......... 1600±25
Firing Order .......... 1-3-2
Compression Ratio .......... 23:1
Direction of Rotation .......... Counterclockwise (viewed from flywheel)
Combustion System .......... Special swirl pre-combustion chamber
Air Cleaner Type .......... Primary and Secondary Filters
Lubrication System Type .......... Forced lubrication with trochoid pump
Oil Filter Type .......... Full Flow, Replaceable
Cooling System Type .......... Liquid cooling with radiator
Cooling Fan Type .......... Pusher
Starting system .......... Electric Starter
Electrical System Rating, Volts .......... 12
Charging System .......... Alternator
Alternator Rating, Amp .......... 20
Fuel System .......... Indirect injection
Fuel Pump Type .......... Mechanical
Fuel Filter .......... Replaceable Element
Governor Type .......... Mechanical centrifugal
Overall Width, in (mm) .......... 17.4 (440)
Overall Height, in (mm) .......... 19.8 (502)
Overall Depth, in (mm) .......... 18.9 (477)
Dry Weight, lbs (kg) .......... 225 (102)
Cylinder bore inside diameter (Std), mm (in) .......... 74.00-74.03 (2.9249-2.9261)
Cylinder bore inside diameter (Wear limit), mm (in) .......... 74.20 (2.9328)
Crankshaft journal outside diameter, mm (in) .......... 43.970-43.980 (1.7379-1.7383)
Bearing metal thickness, mm (in) .......... 1.987-2.000 (0.0785-0.0791)
Crank journal and bushing clearance, mm (in) .......... 0.033-0.059 (0.0013-0.0023)
Crankshaft journal bend, mm (in) .......... 0,020 (0,0008)
Piston outside diameter (Std), mm (in) .......... 73.94-73.97 (2.9225-2.9237)
Piston outside diameter (Wear limit), mm (in) .......... 73.90 (2.9209)
Clearance between piston and cylinder, mm (in) .......... 0.05-0.08 (0.0018-0.0030)
Piston pin outside diameter, mm (in) .......... 20.99-21.00 (0.8297-0.8300)
Piston pin bore diameter, mm (in) .......... 21.00-21.01 (0.8300-0.8304)
Piston pin to piston pin bore clearance, mm (in) .......... 0.00-0.02 (0.0000-0.0007)
Top ring groove width, mm (in) .......... 1.550-1.570 (0.0613-0.0621)
Top ring width, mm (in) .......... 1.470-1.490 (0.0581-0.0589)
Top ring side clearance, mm (in) .......... 0.060-0.100 (0.0024-0.0040)
Top ring end gap, mm (in) .......... 0.200-0.400 (0.0079-0.0158)
Second ring groove width, mm (in) .......... 1.520-1.535 (0.0601-0.0607)
Second ring width, mm (in) .......... 1.410-1.430 (0.0557-0.0565)
Second ring side clearance, mm (in) .......... 0.090-0.125 (0.0036-0.0049)
Second ring end gap, mm (in) .......... 0.200-0.400 (0.0079-0.0158)
Oil ring groove width, mm (in) .......... 3.010-3.025 (0.1190-0.1196)
Oil ring width, mm (in) .......... 2.970-2.990 (0.1174-0.1182)
Oil ring side clearance, mm (in) .......... 0.020-0.055 (0.0008-0.0022)
Oil ring end gap, mm (in) .......... 0.150-0.350 (0.0059-0.0138)
Crankpin bushing inside diameter, mm (in) .......... 43.000-43.016 (1.6996-1.7002)
Crankpin metal thickness, mm (in) .......... 1.487-1.500 (0.0588-0.0593)
Crankpin outside diameter, mm (in) .......... 39.970-39.980 (1.5798-1.5802)
Crankpin to crankpin bushing clearance, mm (in) .......... 0.033-0.059 (0.0013-0.0023)
Piston pin bushing inside diameter, mm (in) .......... 21.025-21.038 (0.8310-0.8315)
Piston pin outside diameter, mm (in) .......... 20.991-21.000 (0.8297-0.8300)
Cylinder head combustion surface distortion, mm (in) .......... 0.05 (0.0020)
Intake valve seat angle, degrees .......... 120
Exhaust valve seat angle, degrees .......... 90
Intake valve seat width, mm (in) .......... 1.44 (0.0569)
Exhaust valve seat width, mm (in) .......... 1.77 (0.0700)
Intake valve stem outside diameter, mm (in) .......... 6.96-6.98 (0.2751-0.2757)
Intake valve guide inside diameter, mm (in) .......... 7.01-7.02 (0.2769-0.2775)
Intake valve stem to guide clearance, mm (in) .......... 0.03-0.06 (0.0012-0.0024)
Exhaust valve stem outside diameter, mm (in) .......... 6.95-6.96 (0.2745-0.2751)
Exhaust valve guide inside diameter, mm (in) .......... 7.01-7.02 (0.2769-0.2775)
Exhaust valve stem to guide clearance, mm (in) .......... 0.05-0.08 (0.0018-0.0030)
Valve guide projection, mm (in) .......... 9.00 (0.3557)
Intake valve sinking depth, mm (in) .......... 0.40-0.60 (0.0158-0.0237)
Exhaust valve sinking depth, mm (in) .......... 0.40-0.60 (0.0158-0.0237)
Thickness of intake valve head, mm (in) .......... 0.99-1.29 (0.0391-0.0510)
Thickness of exhaust valve head, mm (in) .......... 0.95-1.25 (0.0375-0.0494)
Intake valve timing (Open), degrees .......... 7-17
Intake valve timing (Close), degrees .......... 35-45
Exhaust valve timing (Open), degrees .......... 40-50
Exhaust valve timing (Close), degrees .......... 8-18
Valve spring free length, mm (in) .......... 37.40 (1.4783)
Intake and exhaust valve clearance, mm (in) .......... 0.15-0.25 (0.0059-0.0099)
Camshaft journal outside diameter (Gear), mm (in) .......... 39.940-39.960 (1.5787-1.5794)
Camshaft oil clearance (Gear), mm (in) .......... 0.040-0.085 (0.0016-0.0034)
Camshaft journal outside diameter (Center), mm (in) .......... 39.910-39.935 (1.5775-1.5785)
Camshaft oil clearance (Center), mm (in) .......... 0.065-0.115 (0.0026-0.0045)
Camshaft journal outside diameter (Flywheel), mm (in) .......... 39.940-39.960 (1.5787-1.5794)
Camshaft oil clearance (Flywheel), mm (in) .......... 0.040-0.125 (0.0016-0.0049)
Compression Pressure, MPa .......... 3.24±0.1
Fuel Injection Timing (FlD, BTDC) deg .......... 16±1
Fuel injection Pressure, MPa .......... 11.8
Engine oil type .......... SAE 15W-40, 5W-30
Engine oil capacity, qt (L) .......... 2.5 (2.4)
Coolant capacity, qt (L) .......... 3.7 (3.5)
Oil filter change interval .......... Every 250 hours
Oil change interval .......... Every 250 hours
Fuel filter change interval .......... Every 250 hours
Cylinder head bolt (M9x1.25), Nm (lb-ft) ........ 59-64 (43-47)
Connecting rod bolt (M7x1.0), Nm (lb-ft) ........ 23-28 (17-20)
Flywheel clamping bolt (M10x1.25), Nm (lb-ft) ........ 78-88 (58-65)
Metal cap clamping bolt (M10x1.25), Nm (lb-ft) ........ 78-83 (58-61)
Crankshaft V-pulley clamping bolt (M12x1.5), Nm (lb-ft) ........ 113-123 (83-90)
Fuel injection nozzle nut (M20x1.5), Nm (lb-ft) ........ 49-53 (36-39)
Glow plug (M10x1.25), Nm (lb-ft) ........ 15-20 (11-15)
Stub shaft bolt (M10x1.5), Nm (lb-ft) ........ 54-64 (40-47)
Governor weight support nut (M12x1.25), Nm (lb-ft) ........ 69-74 (51-54)
High pressure pipe sleeve clamping nut (M12x1.5), Nm (lb-ft) ........ 29-34 (22-25)
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