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Yanmar 3TNV88 Engine

General Technical Data

Yanmar 3TNV88 Engine Specifications

Engine Model ......... Yanmar 3TNV88
Type ......... Vertical, 4-Cycle, 3-Cylinder, In-Line Diesel
Aspiration ......... Natural
Number of Cylinders ......... 3
Engine Bore, in (mm) ......... 3.47 (88.0)
Engine Stroke, in (mm) ......... 3.54 (90.0)
Displacement, cu.in (L) ......... 100.2 (1.642)
Maximum Engine Power, hp (kW) ......... 36.3 (27.1)
Maximum Engine Speed, rpm ......... 3000
High Idle Speed, rpm ......... 3210±25
Firing Order ......... 1-3-2
Direction of Rotation ......... Counterclockwise
Intake/Exhaust Valve Gap, in (mm) ......... 0.008 (0.2)
Air Cleaner ......... Dry, Replaceable Dual Element

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) ......... 7.1 (6.7)

Cooling System

Cooling System ......... Liquid-Cooled With Radiator
Cooling System Capacity, qt (L) ......... 6.8 (6.5)
Standard Cooling Fan ......... 6 Blades, Pusher Type
Cooling Fan Diameter, in (mm) ......... 13.7 (350)
Fan Diameter, in (mm) ......... 4.7 (120)
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, 60 Amp-Hour

Dimensions

Width, in (mm) .......... 19.13 (486)
Height, in (mm) .......... 24.49 (622)
Depth, in (mm) .......... 22.20 (564)
Weight, lbs (kg) .......... 345 (155)

Yanmar 3TNV88 Maintenance Data

Engine oil type .......... SAE 10W-30/20W-50
Engine oil capacity, qt (L) .......... 7.1 (6.7)
Coolant capacity, qt (L) .......... 6.8 (6.5)
Oil filter change interval .......... Every 250 hours
Oil change interval .......... Every 250 hours
Fuel filter change interval .......... Every 500 hours

Yanmar 3TNV88 Service Specifications

Cylinder Head and Valves

Cylinder Head Surface (Flatness, Standard), in (mm) .......... 0.0020 (0.05)
Cylinder Head Surface (Flatness, Wear Limit), in (mm) .......... 0.0059 (0.15)
Intake Valve Recession (Standard), in (mm) .......... 0.0118-0.0197 (0.30-0.50)
Intake Valve Recession (Wear Limit), in (mm) .......... 0.0315 (0.8)
Exhaust Valve Recession (Standard), in (mm) .......... 0.0118-0.0197 (0.30-0.50)
Intake Valve Recession (Wear Limit), in (mm) .......... 0.0315 (0.8)
Intake Valve Seat Angle, deg .......... 120
Exhaust Valve Seat Angle, deg .......... 90
Valve Seat Angle Correction, deg .......... 40, 150
Intake Valve Guide Inside Diameter, in (mm) .......... 0.3154-0.3159 (8.010-8.025)
Intake Valve Stem Outside Diameter, in (mm) .......... 0.3132-0.3140 (7.955-7.975)
Intake Valve Stem Bend, in (mm) .......... 0.0014-0.0028 (0.035-0.070)
Exhaust Valve Guide Inside Diameter, in (mm) .......... 0.3156-0.3161 (8.015-8.030)
Exhaust Valve Stem Outside Diameter, in (mm) .......... 0.3132-3134 (7.955-7.960)
Exhaust Valve Stem Bend, in (mm) .......... 0.0018-0.0030 (0.045-0.075)
Valve Guide Projection From Cylinder Head, in (mm) .......... 0.5791-0.5905 (14.71-5.00)
Push Rod Bend, in (mm) .......... 0.0012 (0.03)
Valve Spring Free Length (Standard), in (mm) .......... 1.6535 (42.0)
Valve Spring Free Length (Wear Limit), in (mm) .......... 1.6339 (41.5)

Rocker Arm

Rocker Arm Shaft Hole Diameter (Standard), in (mm) .......... 0.6299-0.6307 (16.000-16.020)
Rocker Arm Shaft Hole Diameter (Wear Limit), in (mm) .......... 0.6327 (16.07)
Rocker Arm Shaft Outside Diameter (Standard), in (mm) .......... 0.6286-0.6293 (15.966-15.984)
Rocker Arm Shaft Outside Diameter (Wear Limit), in (mm) .......... 0.6276 (15.94)
Rocker Arm Oil Clearance (Standard), in (mm) .......... 0.0006-0.0021 (0.016-0.054)
Rocker Arm Oil Clearance (Wear Limit), in (mm) .......... 0.0051 (0.13)

Cylinder Block

Cylinder Inside Diameter (Standard), in (mm) .......... 3.4646-3.4657 (88.000-88.030)
Cylinder Inside Diameter (Wear Limit), in (mm) .......... 3.4724 (88.200)
Cylinder Bore Ovality (Standard), in (mm) .......... 0.0004 (0.01)
Cylinder Bore Ovality (Wear Limit), in (mm) .......... 0.0012 (0.03)
Tappet Bore (Block) Inside Diameter (Standard), in (mm) .......... 0.4724-0.4734 (12.000-12.025)
Tappet Bore (Block) Inside Diameter (Wear Limit), in (mm) .......... 0.4742 (12.045)
Tappet Stem Outside Diameter (Standard), in (mm) .......... 0.4715-0.4720 (11.975-11.990)
Tappet Bore (Block) Inside Diameter (Wear Limit), in (mm) .......... 0.4707 (11.955)
Tappet Oil Clearance (Standard), in (mm) .......... 0.0004-0.0020 (0.010-0.050)
Tappet Bore (Block) Inside Diameter (Wear Limit), in (mm) .......... 0.0035 (0.090)

Camshaft

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

Idler Gear and Timing Gear

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

Crankshaft

Crankshaft Bend (Wear Limit), in (mm) .......... 0.0008 (0.02)
Connecting Rod Journal Outside Diameter, in (mm) .......... 1.8879-1.8883 (47.952-47.962)
Connecting Rod Bearing Inside Diameter, in (mm) .......... 1.8898-1.8909 (48.000-48.026)
Connecting Rod Bearing Insert Thickness, in (mm) .......... 0.0587-0.0591 (1.492-1.500)
Connecting Rod Oil Clearance, in (mm) .......... 0.0015-0.0029 (0.038-0.074)
Main Bearing Journal Outside Diameter, in (mm) .......... 1.9666-1.9670 (49.952-49.962)
Main Bearing Inside Diameter, in (mm) .......... 1.9685-1.9693 (50.000-50.020)
Main Bearing Insert Thickness, in (mm) .......... 0.0785-0.0791 (1.995-2.010)
Main Bearing Oil Clearance, in (mm) .......... 0.0015-0.0027 (0.038-0.068)
Crankshaft End Play (Standard), in (mm) .......... 0.0051-0.0091 (0.13-0.23)
Crankshaft End Play (Wear Limit), in (mm) .......... 0.0110 (0.28)

Pistons

Piston Outside Diameter (Standard), in (mm) .......... 3.4622-3.4634 (87.940-87.970)
Piston Outside Diameter (Wear Limit), in (mm) .......... 3.4604 (87.895)
Piston Diameter (Measure Upward From the Bottom of the Piston), in (mm) .......... 0.9449 (24)
Piston Pin Hole Inside Diameter (Standard), in (mm) .......... 1.0236-1.0240 (26.000-26.009)
Piston Pin Hole Inside Diameter (Wear Limit), in (mm) .......... 1.0252 (26.039)
Piston Pin Outside Diameter (Standard), in (mm) .......... 1.0234-1.0236 (25.995-26.000)
Piston Pin Outside Diameter (Wear Limit), in (mm) .......... 1.0222 (25.965)
Piston Pin Oil Clearance, in (mm) .......... 0.0000-0.0006 (0.000-0.014)

Piston Rings

Top Ring Groove Width, in (mm) .......... 0.0811-0.0817 (2.060-2.075)
Top Ring Width (Standard), in (mm) .......... 0.0776-0.0783 (1.970-1.990)
Top Ring Width (Wear Limit), in (mm) .......... 0.0768 (1.950)
Top Ring Side Clearance, in (mm) .......... 0.0028-0.0041 (0.070-0.105)
Top Ring End Gap (Standard), in (mm) .......... 0.0079-0.0157 (0.200-0.400)
Top Ring End Gap (Wear Limit), in (mm) .......... 0.0193 (0.490)
Second Ring Groove Width (Standard), in (mm) .......... 0.0797-0.0803 (2.025-2.040)
Second Ring Groove Width (Wear Limit), in (mm) .......... 0.0843 (2.140)
Second Ring Width (Standard), in (mm) .......... 0.0776-0.0783 (1.970-1.990)
Second Ring Width (Wear Limit), in (mm) .......... 0.0768 (2.150)
Second Ring Side Clearance (Standard), in (mm) .......... 0.0014-0.0028 (0.035-0.070)
Second Ring Side Clearance (Wear Limit), in (mm) .......... 0.0075 (0.190)
Second Ring End Gap (Standard), in (mm) .......... 0.0079-0.0157 (0.200-0.400)
Second Ring End Gap (Wear Limit), in (mm) .......... 0.0193 (0.490)
Oil Ring Groove Width (Standard), in (mm) .......... 0.1581-0.1587 (4.015-4.030)
Oil Ring Groove Width (Wear Limit), in (mm) .......... 0.1626 (4.130)
Oil Ring Width (Standard), in (mm) .......... 0.1563-0.1571 (3.970-3.990)
Oil Ring Width (Wear Limit), in (mm) .......... 0.01555 (3.950)
Oil Ring Side Clearance (Standard), in (mm) .......... 0.0010-0.0024 (0.025-0.060)
Oil Ring Side Clearance (Wear Limit), in (mm) .......... 0.0071 (0.180)
Oil Ring End Gap (Standard), in (mm) .......... 0.0079-0.0157 (0.200-0.400)
Oil Ring End Gap (Wear Limit), in (mm) .......... 0.0193 (0.490)

Connecting Rod

Connecting Rod Small End Pin Bushing Inside Diameter (Standard), in (mm) .......... 1.0234-1.0251 (26.025-26.038)
Connecting Rod Small End Pin Bushing Inside Diameter (Wear Limit), in (mm) .......... 1.0263 (26.068)
Connecting Rod Small End Pin Outside Diameter (Standard), in (mm) .......... 1.0234-1.0236 (25.995-26.000)
Connecting Rod Small End Pin Outside Diameter (Wear Limit), in (mm) .......... 1.0223 (25.967)
Connecting Rod Small End Oil Clearance (Standard), in (mm) .......... 0.0010-0.0017 (0.025-0.043)
Connecting Rod Small End Oil Clearance (Wear Limit), in (mm) .......... 0.0040 (0.101)
Connecting Rod Big End Side Clearance, in (mm) .......... 0.0079-0.0157 (0.20-0.40)

Yanmar 3TNV88 Tightening Torque Specs

Cylinder Head Bolt M10x1.25, ft-lb (Nm) .......... 63-67 (85.3-91.1)
Connecting Rod Bolt M9x1.0, ft-lb (Nm) .......... 33-36 (44.1-49.0)
Flywheel Bolt M10x1.25, ft-lb (Nm) .......... 61-65 (83.3-88.2)
Main Bearing Cap Bolt M12x1.5, ft-lb (Nm) .......... 69-72 (93.2-98.1)
Crankshaft Pulley Bolt M14x1.5, ft-lb (Nm) .......... 83-91 (112.7-122.7)
Fuel Injector Bolt M8x1.25, ft-lb (Nm) .......... 18-21 (24.4-28.4)
Fuel Pump Drive Gear Nut M14x1.5, ft-lb (Nm) .......... 58-65 (78-88)
High-Pressure Fuel Lines Bolt M12x1.5, ft-lb (Nm) .......... 22-25 (29.4-34.3)
Fuel Return Line Bolts, ft-lb (Nm) .......... 6-8 (7.8-9.8)
Fuel Injection Pump Mounting Nuts, ft-lb (Nm) .......... 17-21 (23-28)
Fuel Injector Nozzle Case Nut, ft-lb (Nm) .......... 30-33 (39.2-44.1)