________________________________________________________________________________

Yanmar 3TNV82A Engine

General Technical Data

Yanmar 3TNV82A Engine Specifications

Engine Model ......... Yanmar 3TNV82A
Type ......... Vertical, in-line, 4-cycle, water-cooled diesel
Aspiration ......... Natural
Number of Cylinders ......... 3
Engine Bore, in (mm) ......... 3.23 (82.0)
Engine Stroke, in (mm) ......... 3.31 (84.0)
Displacement, cu.in (L) ......... 81.21 (1.331)
Maximum Engine Power, hp (kW) ......... 26.4 (19.7)
Maximum Engine Speed, rpm ......... 2600
High Idle Speed, rpm ......... 2810±25
Firing Order ......... 1-3-2
Direction of Rotation ......... Counterclockwise
Intake/Exhaust Valve Gap, in (mm) ......... 0.006-0.010 (0.15-0.25)
Air Cleaner ......... Radial seal, dual stage, restriction indicator

Fuel System

Fuel Injection Pump ......... Mechanical
Fuel Filter ......... Replaceable Element
Fuel Injection Pressure, psi (MPa) ......... 3133-3278 (21.6-22.6)
Combustion Chamber ......... Direct injection
Injection Timing (BTDC), deg ......... 18

Lubrication System

Lubricating System ......... Forced Lubrication With Trochoid Pump
Oil Filter ......... Full Flow
Normal Oil Pressure at Rated Speed, psi (MPa) ......... 42-57 (0.29-0.39)
Normal Oil Pressure at Low Idle Speed, psi (MPa) ......... 8.8 (0.06)
Engine Oil Pan Capacity, qt (L) ......... 5.8 (5.5)

Cooling System

Cooling System ......... Liquid-Cooled With Radiator
Cooling System Capacity, qt (L) ......... 6.2 (6.0)
Standard Cooling Fan ......... 6 Blades, Pusher Type
Cooling Fan Diameter, in (mm) ......... 13.2 (335)
Crankshaft Pulley Diameter, in (mm) ......... 4.3 (110)
Thermostat Opening Temperature ......... 157-163F (70-73C)
Full Opening Lift Temperature ......... 185F (85C)

Electrical System

Electrical System Rating, Volts ......... 12
Charging System ......... Alternator
Alternator Rating, Amps ......... DC12V, 40A
Starting System ......... Electric Starting
Starter Motor ......... DC12V, 1.6 hp (1.2 kW)
Battery Capacity ......... 12V, 52 Amp-Hour

Dimensions

Width, in (mm) .......... 19.25 (489)
Height, in (mm) .......... 22.24 (565)
Depth, in (mm) .......... 20.79 (528)
Weight, lbs (kg) .......... 305 (138)

Yanmar 3TNV82A Maintenance Data

Engine oil type .......... SAE 10W-30/20W-50
Engine oil capacity, qt (L) .......... 5.8 (5.5)
Coolant capacity, qt (L) .......... 6.2 (6.0)
Oil filter change interval .......... Every 250 hours
Oil change interval .......... Every 250 hours
Fuel filter change interval .......... Every 500 hours

Yanmar 3TNV82A Service Specifications

Cylinder Block

Cylinder Inside Diameter (Standard) ......... 3.2283-3.2295 in. (82.000-82.030 mm)
Cylinder Inside Diameter (Wear Limit) ......... 3.2362 in. (82.200 mm)
Cylinder Bore Ovality (Standard) ......... 0.0004 in. (0.01 mm)
Cylinder Bore Ovality (Wear Limit) ......... 0.0012 in. (0.03 mm)
Tappet Bore (Block) Inside Diameter (Standard) ......... 0.4724-0.4734 in. (12.000-12.025 mm)
Tappet Bore (Block) Inside Diameter (Wear Limit) ......... 0.4742 in. (12.045 mm)
Tappet Stem Outside Diameter (Standard) ......... 0.4715-0.4720 in. (11.975-11.990 mm)
Tappet Bore (Block) Inside Diameter (Wear Limit) ......... 0.4707 in. (11.955 mm)
Tappet Oil Clearance (Standard) ......... 0.0004-0.0020 in. (0.010-0.050 mm)
Tappet Bore (Block) Inside Diameter (Wear Limit) ......... 0.0035 in. (0.090 mm)

Cylinder Head

Cylinder Head Surface (Flatness, Standard) ......... 0.0020 in. (0.05 mm)
Cylinder Head Surface (Flatness, Wear Limit) ......... 0.0059 in. (0.15 mm)
Intake Valve Recession (Standard) ......... 0.0138-0.0217 in. (0.35-0.55 mm)
Intake Valve Recession (Wear Limit) ......... 0.0315 in. (0.8 mm)
Exhaust Valve Recession (Standard) ......... 0.0118-0.0197 in. (0.30-0.50 mm)
Intake Valve Recession (Wear Limit) ......... 0.0315 in. (0.8 mm)
Intake Valve Seat Angle ......... 120 degrees
Exhaust Valve Seat Angle ......... 90 degrees
Valve Seat Angle Correction ......... 40, 150 degrees
Guide Inside Diameter (Intake) ......... 0.2756-0.2762 in. (7.000-7.015 mm)
Valve Stem Outside Diameter (Intake) ......... 0.2734-0.2740 in. (6.945-9.960 mm)
Valve Stem Bend (Intake) ......... 0.0016-0.0028 in. (0.040-0.070 mm)
Guide Inside Diameter (Exhaust) ......... 0.2756-0.2762 in. (7.000-7.015 mm)
Valve Stem Outside Diameter (Exhaust) ......... 0.2732-0.2754 in. (6.940-6.955 mm)
Valve Stem Bend (Exhaust) ......... 0.0018-0.0030 in. (0.045-0.075 mm)
Valve Guide Projection From Cylinder Head ......... 0.4724 in. (11.70-12.00 mm)
Push Rod Bend ......... 0.0012 in. (0.03 mm)
Valve Spring Free Length (Standard) ......... 1.7480 in. (44.4 mm)
Valve Spring Free Length (Wear Limit) ......... 1.7283 in. (43.9 mm)
Rocker Arm Shaft Hole Diameter (Standard) ......... 0.6299-0.6307 in. (16.000-16.020 mm)
Rocker Arm Shaft Hole Diameter (Wear Limit) ......... 0.6327 in. (16.07 mm)
Rocker Arm Shaft Outside Diameter (Standard) ......... 0.6286-0.6293 in. (15.966-15.984 mm)
Rocker Arm Shaft Outside Diameter (Wear Limit) ......... 0.6276 in. (15.94 mm)
Rocker Arm Oil Clearance (Standard) ......... 0.0006-0.0021 in. (0.016-0.054 mm)
Rocker Arm Oil Clearance (Wear Limit) ......... 0.0051 in. (0.13 mm)

Camshaft

Camshaft End Play (Standard) ......... 0.0020-0.0079 in. (0.05-0.20 mm)
Camshaft End Play (Wear Limit) ......... 0.0118 in. (0.030 mm)
Camshaft Bend (Standard) ......... 0-0.0008 in. (0-0.02 mm)
Camshaft Bend (Wear Limit) ......... 0.0020 in. (0.05 mm)
Cam Lobe Height ......... 1.5197-1.5276 in. (38.600-38.800 mm)
Bushing Inside Diameter (Gear End) ......... 1.7713-1.7738 in. (44.990-45.055 mm)
Camshaft Outside Diameter (Gear End) ......... 1.7687-1.7697 in. (44.925-44.950 mm)
Oil Clearance (Gear End) ......... 0.0016-0.0051 in. (0.040-0.130 mm)
Bore Inside Diameter (Intermediate) ......... 1.7716-1.7726 in. (45.000-45.025 mm)
Camshaft Outside Diameter (Intermediate) ......... 1.7681-1.7691 in. (44.910-44.935 mm)
Oil Clearance (Intermediate) ......... 0.0026-0.0045 in. (0.065-0.115 mm)
Bore Inside Diameter (Flywheel End) ......... 1.7716-1.7726 in. (45.000-45.025 mm)
Camshaft Outside Diameter (Flywheel End) ......... 1.7687-1.7697 in. (44.925-44.950 mm)
Oil Clearance (Flywheel End) ......... 0.0020-0.0039 in. (0.050-0.100 mm)

Idler Gear and Timing Gear

Idler Gear Shaft Outside Diameter (Standard) ......... 1.8091-1.8100 in. (45.950-45.975 mm)
Idler Gear Shaft Outside Diameter (Wear Limit) ......... 1.8071 in. (45.900 mm)
Idler Gear Bushing Inside Diameter (Standard) ......... 1.8110-4.8120 in. (46.000-46.025 mm)
Idler Gear Bushing Inside Diameter (Wear Limit) ......... 1.8140 in. (46.075 mm)
Idler Gear Oil Clearance (Standard) ......... 0.0010-0.0030 in. (0.025-0.075 mm)
Idler Gear Oil Clearance (Wear Limit) ......... 0.0069 in. (0.175 mm)
Timing Gear Backlash (Standard) ......... 0.0028-0.0059 in. (0.07-0.15 mm)
Timing Gear Backlash (Wear Limit) ......... 0.0067 in. (0.17 mm)

Crankshaft

Crankshaft Bend (Wear Limit) ......... 0.0008 in. (0.02 mm)
Connecting Rod Journal Outside Diameter ......... 1.6910-1.6914 in. (42.952-42.962 mm)
Connecting Rod Bearing Inside Diameter ......... 1.6929-1.6946 in. (43.000-43.042 mm)
Connecting Rod Bearing Insert Thickness ......... 0.0585-0.0591 in. (1.487-1.500 mm)
Connecting Rod Oil Clearance ......... 0.0015-0.0035 in. (0.038-0.090 mm)
Main Bearing Journal Outside Diameter ......... 1.8485-1.8489 in. (46.952-46.962 mm)
Main Bearing Journal Inside Diameter ......... 1.8504-1.8516 in. (47.000-47.032 mm)
Main Bearing Insert Thickness ......... 0.0782-0.0787 in. (1.987-2.000 mm)
Main Bearing Journal Clearance ......... 0.0015-0.0031 in. (0.038-0.080 mm)
Crankshaft End Play (Standard) ......... 0.0051-0.0091 in. (0.13-0.23 mm)
Crankshaft End Play (Wear Limit) ......... 0.0110 in. (0.28 mm)

Pistons

Piston Outside Diameter (Standard) ......... 3.2264-3.2275 in. (81.950-81.980 mm)
Piston Outside Diameter (Wear Limit) ......... 3.2246 in. (81.905 mm)
Piston Diameter (Measure Upward From the Bottom of the Piston) ......... 0.6299 in. (16 mm)
Piston Pin Hole Inside Diameter (Standard) ......... 0.9055-0.9059 in. (23.000-23.009 mm)
Piston Pin Hole Inside Diameter (Wear Limit) ......... 0.9070 in. (23.039 mm)
Piston Pin Outside Diameter (Standard) ......... 0.9053-0.9055 in. (22.995-23.000 mm)
Piston Pin Outside Diameter (Wear Limit) ......... 0.9041 in. (22.965 mm)
Piston Pin Oil Clearance ......... 0.0000-0.0006 in. (0.000-0.014 mm)

Piston Rings

Top Ring Groove Width ......... 0.0813-0.0819 in. (2.065-2.080 mm)
Top Ring Width (Standard) ......... 0.0776-0.0783 in. (1.970-1.990 mm)
Top Ring Width (Wear Limit) ......... 0.0768 in. (1.950 mm)
Top Ring Side Clearance ......... 0.0030-0.0043 in. (0.075-0.110 mm)
Top Ring End Gap (Standard) ......... 0.0079-0.0157 in. (0.200-0.400 mm)
Top Ring End Gap (Wear Limit) ......... 0.0193 in. (0.490 mm)
Second Ring Groove Width (Standard) ......... 0.0801-0.0807 in. (2.035-2.050 mm)
Second Ring Groove Width (Wear Limit) ......... 0.0846 in. (2.150 mm)
Second Ring Width (Standard) ......... 0.0776-0.0783 in. (1.970-1.990 mm)
Second Ring Width (Wear Limit) ......... 0.0768 in. (2.150 mm)
Second Ring Side Gap (Standard) ......... 0.0018-0.0031 in. (0.045-0.080 mm)
Second Ring Side Gap (Wear Limit) ......... 0.0079 in. (0.200 mm)
Second Ring End Gap (Standard) ......... 0.0079-0.0157 in. (0.200-0.400 mm)
Second Ring End Gap (Wear Limit) ......... 0.0193 in. (0.490 mm)
Oil Ring Groove Width (Standard) ......... 0.1581-0.1587 in. (4.015-4.030 mm)
Oil Ring Groove Width (Wear Limit) ......... 0.1626 in. (4.130 mm)
Oil Ring Width (Standard) ......... 0.1563-0.1571 in. (3.970-3.990 mm)
Oil Ring Width (Wear Limit) ......... 0.01555 in. (3.950 mm)
Oil Ring Side Clearance (Standard) ......... 0.0010-0.0024 in. (0.025-0.060 mm)
Oil Ring Side Clearance (Wear Limit) ......... 0.0071 in. (0.180 mm)
Oil Ring End Gap (Standard) ......... 0.0079-0.0157 in. (0.200-0.400 mm)
Oil Ring End Gap (Wear Limit) ......... 0.0193 in. (0.490 mm)

Connecting Rod

Connecting Rod Small End Pin Bushing I.D (Standard) ......... 0.9065-0.9070 in. (23.025-23.038 mm)
Connecting Rod Small End Pin Bushing I.D (Wear Limit) ......... 0.9082 in. (23.068 mm)
Connecting Rod Small End Pin O.D (Standard) ......... 0.9053-0.9055 in. (22.995-23.000 mm)
Connecting Rod Small End Pin O.D (Wear Limit) ......... 0.9042 in. (22.967 mm)
Connecting Rod Small End Oil Clearance (Standard) ......... 0.0010-0.0017 in. (0.025-0.043 mm)
Connecting Rod Small End Oil Clearance (Wear Limit) ......... 0.0040 in. (0.101 mm)
Connecting Rod Big End Side Clearance ......... 0.0079-0.0157 in. (0.20-0.40 mm)

Yanmar 3TNV82A Tightening Torque Specs

Cylinder Head Bolt (M9x1.25) ......... 46-49 ft-lb (61.7-65.7 Nm)
Connecting Rod Bolt (M9x1.0) ......... 33-36 ft-lb (44.1-49.0 Nm)
Flywheel Bolt (M10x1.25) ......... 61-65 ft-lb (83.3-88.2 Nm)
Main Bearing Cap Bolt (M10x1.25) ......... 56-60 ft-lb (76.4-80.4 Nm)
Crankshaft Pulley Bolt (M14x1.5) ......... 83-91 ft-lb (112.7-122.7 Nm)
Fuel Injector Bolt (M8x1.25) ......... 18-21 ft-lb (24.4-28.4 Nm)
Fuel Pump Drive Gear Nut (M14x1.5) ......... 58-65 ft-lb (78-88 Nm)
High-Pressure Fuel Lines Bolt (M12x1.5) ......... 22-25 ft-lb (29.4-34.3 Nm)
Fuel Return Line Bolts ......... 6-8 ft-lb (7.8-9.8 Nm)
Fuel Injection Pump Mounting Nuts ......... 17-21 ft-lb (23-28 Nm)
Fuel Injector Nozzle Case Nut ......... 30-33 ft-lb (39.2-44.1 Nm)