Facts About Generators
GeneratorsDirectoryCompareRepairEnginesControllersPartsManufacturersGuides
Search models or part #
Home›Engines›Isuzu BB-4JG1T

Isuzu BB-4JG1T Engine

The Isuzu BB-4JG1T is a 2.5 L 4-cylinder turbocharged engine rated at 1500 rpm, producing up to 36000 kW. It powers generator sets from MQ Power, including the DCA 45 SSIU, DCA-45SSIU3, DCA-45USI and DCA45SSIU3.

Also known as: ISUZU BB-4JG1T

Part of the Isuzu BB4 engine family — 2 variants share parts & fitment.

2.5 L
Displacement
4
Cylinders
1500 rpm
Rated speed
36000 kW
Gross power
On this pageSpecsGenerator setsMaintenanceFAQProcedures

Engine specifications

Displacement2.5 L
Cylinders4
AspirationTurbocharged
Rated speed1500 rpm
Gross power36000 kW

Generator sets powered by this engine

5
MQ Power DCA 45 SSIUMQ Power DCA-45SSIU3MQ Power DCA-45USIMQ Power DCA45SSIU3MQ Power DCA45USI

Maintenance schedule

ItemSpecCapacityPart #Interval
Air filter—
Fuel filter—500 hr
Oil filter—
Battery—
Belt—
Coolant—
Oil—200 hr
Spark plug—

Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.

Procedures

1
Testing The Voltage Selector Switch diagnostic

⚠ ALL ADJUSTMENTS MUST BE MADE BY A QUALIFIED ELECTRICAL TECHNICIAN. MQ POWER IS NOT RESPONSIBLE FOR ANY DAMAGES TO EQUIPMENT AND/OR COMPONENTS RESULTANT FROM UNQUALIFIED PERSONNEL.

⚠ DO NOT remove metal jumpers during testing

⚠ DO NOT remove wire jumpers during testing

  1. Give a thorough visual inspection of the Voltage Selector Switch, looking for burned spots, discoloration, smoke damage and/or damaged cabling.
  2. Rotate the switch with the unit not running; ensure proper rotation with no sticking between positions or a locked switch.
  3. If any of the above faults are found, replace the switch. If no faults are found, proceed to Step #2.
  4. Remove the Voltage Selector Switch from its housing, disconnecting all cabling EXCEPT the large cable jumpers, the metal jumpers, and the wire jumpers (block to block).
  5. With the switch removed and placed on a bench, test the switch following the attached contact diagram in all three (3) positions.
  6. If any contacts test the opposite of the diagram, replace the switch and rewire per the Generator Wiring Diagram in the Unit Instruction Manual.

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Parts cataloged across the Isuzu BB4 family

6
Part #DescriptionCategory
DCA-45SSIU3Air Cleaner Dust IndicatorAir filter
897232-2520fan beltBelt
8973226800fan beltBelt
894437-0220fuel filter elementFuel filter
1819001902Motor StopperService part / kit
Y06020fuel priming pump buttonPump

Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.

Aftermarket parts that fit this engine

4
6Pcs FridayParts $8.99 SinoCMP $69.00 8944024980 FridayParts $17.83 1823160070 FridayParts $17.83 8970661980 FridayParts $42.00 SinoCMP $79.00

Parts listed by aftermarket suppliers as fitting this engine — leads compiled from supplier catalogs; verify the exact part for your serial number.

Common questions

What is the displacement of the Isuzu BB-4JG1T?

The Isuzu BB-4JG1T has a displacement of 2.5 liters with 4 cylinders.

Which generators use the Isuzu BB-4JG1T engine?

The Isuzu BB-4JG1T powers 5 generator set(s), including MQ Power DCA 45 SSIU, MQ Power DCA-45SSIU3, MQ Power DCA-45USI, MQ Power DCA45SSIU3, MQ Power DCA45USI.

How often should you change the oil in the Isuzu BB-4JG1T?

The Isuzu BB-4JG1T oil change interval is every 200 hours.