Service parts for the MCG1000MT2
Grouped by system, with how many of each the parts manual calls for.
Oil system
1 requiredPrices captured from merchant listings; some links are affiliate links. Confirm against your serial number before ordering.
Specifications
| Fuel | Diesel |
|---|---|
| Frequency | 60.0 Hz |
| Standby power | 1000 kW |
| Standby kVA | 1250 |
| Prime power | 900 kW |
| Emissions | EPA Tier 2 |
| Controller | DSE8610 |
| Oil capacity | 200.0 L |
| Alternator | Marathon 741RSL8045 (Class H insulation) |
| Voltage options | 277/480 V |
| Phase | 3 |
| Rated current | 1503 A |
| Power factor | 0.8 |
| Circuit breaker | 1600 A |
| Battery group | 8D |
| Battery cranking | 1100 CCA |
| Battery voltage | 24V V |
| Battery quantity | 4 |
| Coolant capacity | 401 L |
| Fuel tank | 5148.0 L |
Engine
| Oil capacity | 200.0 L |
|---|---|
| Coolant capacity | 401.0 L |
| Displacement | 2265.0 L |
| Aspiration | Turbocharged, Intercooled |
| Rated speed | 1800 rpm |
Maintenance & consumables
for the Mitsubishi S12H-Y2PTAW-1| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Dry | — | |||
| Fuel filter | Cartridge | ×4 | — | 200 hr | |
| Oil filter | Cartridge | ×5 | GM13942 | Amazon $60.99 eBay $37.99 | |
| Battery | 8D | ×2 | — | 200 hr | |
| Belt | Rubber-booted engine electrical connections | — | 200 hr | ||
| Coolant | Coolant | 76.3 gal | — | 200 hr | |
| Coolant filter | UV/Ozone resistant hoses | — | 12 hr | ||
| Oil | 200.0 L | — | 200 hr | ||
| Spark plug | Spark Plug | — | 200 hr |
Service intervals
3| Item | Action | Hours | Months | Notes |
|---|---|---|---|---|
| Engine Oil and All Oil Filters | Change | 250 hr | First service — Change the oil and oil filters after the first 50 hours, then every 250 hours | |
| Valve Clearance | Adjust | 2000 hr | First service — Inspect and adjust valve clearance after first 250 hours, then every 2000 hours | |
| Engine Coolant | Change | 24 mo | Extended Maintenance Schedule; or every two years |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Service specifications
3| Type | Item | Value | Unit | Condition |
|---|---|---|---|---|
| Pressure | Minimum oil pressure at startup | 5 | psi (34 kPa) | within five seconds of start; shut down immediately if not reached |
| Speed | Generator frequency | 60 | Hz | at rated engine speed 1800 rpm |
| Temperature | High coolant temperature - stop engine immediately if coolant temperature is | 210 | °F (99°C) | at or above |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Recommended fluids
| Fluid | Grade | Standard | Ambient | Capacity | Notes |
|---|---|---|---|---|---|
| Coolant | Peak Fleet-Charge 50/50 ethylene glycol type coolant (maroon colored for diesel engines) | 401.0 L | Coolant incl. engine 106 qt (401 L); use demineralized or distilled water; dilute anti-freeze based on theoretical temperature 9-18°F (5-10°C) below lowest expected; 40-60% ratio most common | ||
| Engine oil | 15W-40 | API Service Class CF class 1 (minimum) | 200.0 L | Oil capacity incl. filter 52.8 qt (200 L); refer to engine operation manual for detailed oil grade and viscosity information | |
| Fuel | Diesel | 5148.0 L | Fuel tank volume 1360 gal (5148 L); do not move unit with over 200 gallons (757 liters) of diesel fuel in tank |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Procedures
9Parallel Setup and Operation installation
⚠ Contact Generac Mobile Products Technical Service to verify the units to be used in parallel are appropriate for the planned load.
Tools: Link cable, 120 ohm resistor plugs
- Verify each unit operates properly and set up auto (remote) starting on each unit.
- Remove receptacle covers from the CAN receptacles.
- Using the provided link cable, connect a CAN receptacle on the first unit to a CAN receptacle on the next unit.
- Insert the provided 120 ohm resistor plug into the unused CAN receptacles on both units.
- To parallel more than two units, chain link cables to the next unit; insert 120 ohm resistor plugs into unused CAN receptacles on first and last units.
Changing the Oil maintenance
⚠ Hot engine oil and parts may cause burns. Wear gloves when draining oil or changing the oil filters.
⚠ Do not use a filter wrench to install the oil filter and bypass oil filter.
⚠ Dispose of waste oil in accordance with local regulations.
Tools: Filter wrench, Drain hose, Approved container, Clean cloth
- Ensure the oil drain valve is closed and remove the drain plug from the right side of the skid frame.
- Attach a drain hose to the bung and route the hose into an approved container.
- Ensure the oil level controller valve is open; open the drain valve at the engine oil pan.
- Allow the oil to drain completely into the container.
- Clean around the oil filters.
- Using a filter wrench, remove the oil filters, one at a time.
- Discard the filters and gaskets.
- Thoroughly wipe off oil on the oil filter mounting surface with a cloth.
- Lubricate the new gaskets with a thin film of clean engine oil.
- Install the new oil filters, turning 3/4 to full turn after initial gasket contact.
- Close the engine oil drain valve and reinstall the plug at the skid frame drain port.
- Remove the cap from the oil fill port and add fresh oil.
- Check that the level is between the Full and Add marks on the dipstick.
- After running the unit, ensure the oil level is at the halfway mark or above in the oil level controller sight glass.
Checking the Oil Level maintenance
⚠ DO NOT start the unit if oil is not visible in the oil level controller sight gauge or is below the add mark on the dipstick.
⚠ DO NOT OVERFILL the crankcase.
Tools: Clean lint free cloth
- Locate the engine oil dipstick.
- Most accurate readings when engine is cold; if running, wait at least 10 minutes.
- Remove the dipstick and wipe dry with a clean, lint free cloth.
- Slowly insert the clean dipstick into the tube; confirm it is fully seated.
- After 10 seconds, remove the dipstick; the lower of the two readings is correct.
- Add oil if necessary; run the engine one minute, wait 10 minutes, then recheck.
Draining the Fuel/Water Separators maintenance
⚠ All valves must be open during operation. Check prior to starting the unit.
Tools: Container
- Place a container under the drain cocks of the water separators.
- Open the drain cocks and drain the water.
- Close all the drain cocks.
Raising and Lowering the Stairs maintenance
⚠ The stairs are very heavy. Serious injury can result if not supported properly.
- Lowering: release the stairs from the side guides by grasping both cables and pulling toward you.
- After lowering, pull out the bottom tab on the side rail.
- Push down on the tab to lower the stair foot to the desired height; repeat for other side.
- Raising: push the lower tab in.
- Push down on the upper tab until the foot is fully retracted; repeat for other side.
- Lift the stairs up and let the side brackets settle slowly into the side guards of the door.
Shutting Down and Restarting the Generator maintenance
⚠ NEVER perform routine service unless all electrical components are shut off.
- Ensure power to the load can be interrupted and warn equipment users.
- Push the Gen-Set button on the controller to open the Main Circuit Breaker (MCB).
- Allow the unit to cool down (running at no-load) for approximately five minutes.
- Push the Stop/Reset (O) button on the controller.
- Turn the battery disconnect switch to the OFF position.
- Perform the necessary maintenance checks or tasks.
- Turn the battery disconnect to the ON position.
- Push the Start (I) button on the controller.
- Verify all engine/generator parameters are correct, then push the Gen-Set button to close the MCB.
- Make a last visual inspection of the unit.
Auto (Remote) Starting of the Unit operation
⚠ Follow all safety warnings on isolating the generator with a transfer switch if used as a standby power supply.
Tools: Jumper wire minimum 16 gauge
- Perform a manual start of the unit at least once to verify that the engine is operating correctly.
- Connect the remote start wires to terminals #12 and #34 on TB4.
- Remove the jumper wire from the terminal block and the engine will stop; reconnect remote start switch wires.
- Confirm the unit is in Auto Mode; the LCD window should show "Auto Mode" at the top of the screen.
- The unit is now ready for remote starting.
Manually Starting the Unit operation
⚠ NEVER start the unit under load. The circuit breaker must be off when starting the unit.
- Turn the battery disconnect switch to the ON position.
- Push the Manual Mode button on the controller.
- Push the Start (I) button.
- Allow the engine to warm sufficiently (about 15 minutes) before adding a load.
- Push the Gen-Set button on the controller to close the main circuit breaker.
Shutting Down the Unit operation
⚠ Check with personnel using power before shutting down.
- Open the Main Circuit Breaker (MCB) by pushing the Gen-Set button on the controller.
- Allow the unit to cool down (running at no-load) for approximately five minutes.
- Push the Stop (O) button on the controller.
- Turn the battery disconnect switch to the OFF position.
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Common questions
What size generator is the Generac MCG1000MT2?
The Generac MCG1000MT2 is rated 1000 kW standby (1250.0 kVA).
What engine is in the Generac MCG1000MT2?
The Generac MCG1000MT2 is powered by the Mitsubishi S12H-Y2PTAW-1 engine.
Is the Generac MCG1000MT2 diesel or gas?
The Generac MCG1000MT2 runs on Diesel.
What is the oil capacity of the Generac MCG1000MT2?
The Mitsubishi S12H-Y2PTAW-1 engine in the Generac MCG1000MT2 has an oil capacity of 200.0 liters.
What alternator comes on the Generac MCG1000MT2?
The Generac MCG1000MT2 uses a Marathon 741RSL8045 alternator. Insulation class H.
Which oil filter part number does the Generac MCG1000MT2 take?
The Generac MCG1000MT2 uses oil filter part number GM13942.
Troubleshooting
6Symptoms & remedies
| Symptom | Cause | Remedy |
|---|---|---|
| Engine Cranks But Will Not Start | Refer to engine manual or contact Generac Mobile Products Technical Service. | |
| Engine Will Not Crank (Electric Start) | Refer to engine manual or contact Generac Mobile Products Technical Service. | |
| Engine Starts But Will Not Run Smoothly | Refer to engine manual or contact Generac Mobile Products Technical Service. | |
| Engine Overheats | Refer to engine manual or contact Generac Mobile Products Technical Service. | |
| No Output Voltage | Circuit breaker tripped or failed Internal failure of alternator | Reset or replace circuit breaker. Check electrical connections. |
| High Output Voltage | Excessive speed | Verify engine RPM. Check AVR adjustment. |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing. Full Generac MCG1000MT2 troubleshooting guide (15 entries) →
Parts
16| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 0161970SBY | Battery | 1 | Battery | Amazon eBay |
| 01865 | Fuel/Water Filtering System | Fuel filter | Amazon eBay | |
| 18650 | Oil filter | Amazon eBay $24.69 | ||
| 01858 | Engine Oil Recommendations | Service part / kit | Amazon eBay | |
| 01859 | Serial Number Locations | Service part / kit | Amazon eBay | |
| 01860 | GFCI Receptacle and Interior Light Timer | Service part / kit | Amazon eBay | |
| 01861 | Component Locations - Left Side | Service part / kit | Amazon eBay | |
| 01862 | Component Locations - Right Side | Service part / kit | Amazon eBay | |
| 01863 | Control Panel | Service part / kit | Amazon eBay | |
| 01864 | Digital Controller | Service part / kit | Amazon eBay | |
| 01866 | Parallel Setup and Operation | Service part / kit | Amazon eBay | |
| 01867 | Generator Output Connections | Service part / kit | Amazon eBay | |
| 01868 | Voltage Regulator | Service part / kit | Amazon eBay | |
| 01870 | A299X- 68-03 fos! 104 F1035-12045 25-01 | 29 5 | F1805-10020 68-01 fo5 19 | Service part / kit | Amazon eBay | |
| 01871 | Maintenance schedule and basic maintenance tasks for MCG1000MT2 | Service part / kit | Amazon eBay | |
| 01873 | Maintenance schedule and extended maintenance tasks for MCG1000MT2 | Service part / kit | Amazon eBay |
Service, wear & replacement parts referenced for this model and its engine — confirm the exact part for your serial number. See the full parts catalog to search and cross-reference.
Fuel consumption
| Rating | Load | L/h | gal/h |
|---|---|---|---|
| Prime | 268.4 | 70.9 |