Isuzu 4JB1 Engine Specifications

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4JB1 > MAIN SPECIFICATIONS:
Type

4 Cylinder, 4 Cycle, Water Cooled, OHV, Direct Injected

Bore & Stroke

3.7 x 4.0 in. (93 mm x 102 mm)

Piston Displacement

169 cu. in. (2.8 liter)

Compression Ratio

18.2:1

Dry Weight

524 lbs. (238 kg)

Dimensions - L x W x H

31.7 x 23.3 x 29.5 in.
(805 x 590 x 750 mm)

Coolant Capacity (Block)

5.3 qts. (5.0 liter)

Lube Oil Capacity

5.8 qts. (5.5 liter)

Engine Rotation Direction

Counter Clockwise From Flywheel

MAIN FEATURES:

STANDARD:

Alternator A.C.

12V-35A

Voltage Regulator

Integral w / Alt.

Starter

12V- 2.2 kW Gear Reduction

Exhaust Outlet

Vertical-Up-Rear

Air Inlet

Vertical-Up-Center

Flywheel Housing

SAE #4

Flywheel

For 10" Overcenter Clutch 2 Piece

Oil Pan

Center Sump-35° Inclination

Water Outlet

Vertical

Fan

15 in. (380 mm) Blower

INDUSTRIAL RATING*
Intermittent

70 BHP @ 3000 RPM

Continuous

61 BHP @ 3000 RPM

Max Torque
*SAE J1995 Gross BHP

132 lb.-ft. @ 2000 RPM

Specifications subject to change without notice.

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SPECIAL FEATURES:
* Direct Injection
* Glow Plug Starting Assist
* Replaceable Cromard Dry Liners
Power Curve > 4JB1
A - 132 LB-FT INTERMITTENT
B - 116 LB-FT CONTINUOUS
C - 70 BHP INTERMITTENT
D - 61 BHP CONTINUOUS

Rated within 5% at ambient conditions of:
Temperature: 77° F (25°C)
Pressure: 29.31 "Hg (99kPa) DRY
Fuel Specific Gravity: 0.825
Intermittent Rating: (Solid Line)
Continuous Rating: (Dashed Line)
NOTE: Muffler & Air Cleaner not installed
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