Service parts for the MLT4200IV
Grouped by system, with how many of each the parts manual calls for.
Fuel system
1 requiredOil system
1 requiredPrices captured from merchant listings; some links are affiliate links. Confirm against your serial number before ordering.
Specifications
| Frequency | 60.0 Hz |
|---|---|
| Standby power | 30 kW |
| Standby kVA | 40 |
| Prime power | 27 kW |
| Controller | PowerZone–DLA |
| Oil capacity | 8.0 L |
| Alternator | Marathon 334CSA3028 |
| Voltage options | 120 V, 240 V |
| Phase | single phase |
| Rated current | 167 A |
| Power factor | 1 |
| Circuit breaker | 100 A |
| Battery group | 24 |
| Battery cranking | 720 CCA |
| Battery voltage | 12.0 V |
| Battery quantity | 1 |
| Dimensions (L×W×H) | 2920×2590×2130 mm |
| Dry weight | 991 kg |
| Sound level | 70.0 dBA @ 23.0 m |
| Tank runtime | 24.5 hr |
Maintenance & consumables
for the Isuzu 4LE2TAGV-08| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Inspect and replace air filter element as required. | — | |||
| Fuel filter | 69858 | Amazon $21.83 eBay $21.83 FridayParts $36.28 | |||
| Oil filter | 670570304 | 500 hr | Amazon eBay $16.89 PartsGeek $7.98 FridayParts $20.19 | ||
| Battery | Inspect battery condition; replace if necessary. | — | 1000 hr | ||
| Belt | Inspect and replace fan belt as required. | — | |||
| Coolant | Check coolant level daily; add coolant if needed. | — | 1000 hr | ||
| Oil | Change oil and oil filter every 500 hours after initial break-in. | 4.7 L | — | 500 hr | |
| Spark plug | — |
Compatible filters for the Isuzu 4LE2TAGV-08 — cross-referenced via Donaldson. Options to verify against your serial number, not confirmed for this exact unit.
- Air filter: Generac OE3557 Generac OE3656 Isuzu 8972319000 Isuzu 5864014350 Isuzu 8972599390
Common questions
How many kW is the Generac MLT4200IV?
The Generac MLT4200IV is rated 30 kW standby (40.2 kVA).
What engine does the Generac MLT4200IV use?
The Generac MLT4200IV is powered by the Isuzu 4LE2TAGV-08 engine.
What alternator comes on the Generac MLT4200IV?
The Generac MLT4200IV uses a Marathon 334CSA3028 alternator.
What oil filter fits the Generac MLT4200IV?
The Generac MLT4200IV uses oil filter part number 670570304.
Which fuel filter part number does the Generac MLT4200IV take?
The Generac MLT4200IV uses fuel filter part number 69858.
What air filter does the Generac MLT4200IV use?
The Generac MLT4200IV uses air filter part numbers GENERAC OE3557, GENERAC OE3656.
Troubleshooting
7Symptoms & remedies
| Symptom | Cause | Remedy |
|---|---|---|
| Unit cranks but does not start | Low fuel level, Restricted air filter, Fuel flow obstructed, Air in fuel system, Glow plug(s) inoperable | Verify fuel level in tank., Inspect air filter for blockage., Inspect fuel supply hose from tank to fuel filter for cracks and abrasion., Check fuel pump operation., Purge air from fuel system., See the OEM engine manual for more information. |
| Unit starts but stumbles and dies | Low ambient temperature, Intake heat inoperable, Air in fuel lines, High coolant temperature shutdown | Verify if ambient temperature is within unit limits., Inspect engine air inlet heater function., Purge air from fuel lines., Allow engine to cool. Check coolant level in radiator. Add coolant level if needed., Inspect radiator shroud and ducting for blockage and remove any foreign matter., Inspect for visible leaks. Check tension of water pump drive belt., Contact a GMASD to replace., Remove load on generator and restart engine. Check coolant temperature and shut engine down immediately if it starts to overheat. |
| Mast lights off, checking inside control box | Loose lighting connections | Inspect the connections inside the control box. |
| Loose mast cable connector | Verify outside connector is connected properly to inside control box. | |
| Generator output incorrect | Check the incoming voltage to the ballast driver by checking the available voltage on the GFCI receptacle. Incoming voltage should be 120V ± 5V. If voltage is incorrect, the generator may require service. | |
| One or more lights do not turn on | Light breaker tripped. | Inspect light breakers. |
| Lights not turned on | Inspect electronic control to see if lights are on. Turn lights on. | Turn lights on. If problems continue, contact Generac Mobile at 1-800-926-9768 for assistance. |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.
Fuel consumption
| Rating | Load | L/h | gal/h |
|---|---|---|---|
| Prime | 7.95 | 2.1 | |
| Standby | 29.53 | 7.8 |