Service parts for the MLT4080
Grouped by system, with how many of each the parts manual calls for.
Air intake
1 requiredFuel system
1 requiredOil system
1 requiredBelts
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 | 9 kW |
| Standby kVA | 13 |
| Prime power | 8 kW |
| Emissions | 4F |
| Oil capacity | 5.4 L |
| Alternator | Marathon 201CSA5411 (Class F insulation) |
| Voltage options | 120/240 V |
| Phase | 3 ph. |
| Rated current | 50 A |
| Power factor | .8PF |
| Circuit breaker | 30 A |
| Battery group | 24 |
| Battery cranking | 440 CCA |
| Battery voltage | 12V V |
| Battery quantity | 1 |
| Dimensions (L×W×H) | 170×70×30 mm |
| Dry weight | 1695 kg |
| Fuel tank | 114.0 L |
| Tank runtime | 64 hr |
Engine
| Oil capacity | 3.6 L |
|---|---|
| Coolant capacity | 4.3 L |
| Displacement | 0.95 L |
| Aspiration | liquid cooled, 4-stroke |
| Rated speed | 1800 rpm |
Maintenance & consumables
for the Mitsubishi L3E-W461ML| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Mitsubishi / Kubota | 16444 | Amazon $370.99 eBay | ||
| Fuel filter | Kubota D905 | 13515 | 500 hr | Amazon eBay | |
| Oil filter | 7665025430 | 1000 hr | Amazon $18.01 eBay $22.12 PartsGeek $7.98 | ||
| Battery | Sealed maintenance-free battery preferred for marine application; minimum cranking performance 360 CCA at 0 F (-18 C); nominal 12 volts. Maintain electrolyte to split-level marker with distilled water; charge if specific gravity below 1.215; stop charging at 1.260 at approximately 80 F (27 C). | — | 12000 hr | ||
| Belt | Mitsubishi | 10386 | 1000 hr | Amazon eBay | |
| Coolant | 50/50 mixture of ethylene glycol anti-freeze and water; must contain rust and corrosion inhibitor and no stop-leak additive; use clean, low-mineral, distilled or soft water. Do not deviate from 50/50 mixture. Drain, flush and refill once a year. | 4.5 l | — | 12000 hr | |
| Coolant filter | — | 250 hr | |||
| Oil | API classification CG-4, CF-4, CD/SG or CE/SG; viscosity per Table 1 (oil viscosity vs. temperature). Do not use synthetic or non-detergent oil. Check level before each start; do not operate below ADD or above FULL mark. | 5.1 l | — | 1200 hr | |
| Spark plug | — | 1000 hr |
Common questions
What size generator is the Generac MLT4080?
The Generac MLT4080 is rated 9 kW standby (13.1 kVA).
What engine is in the Generac MLT4080?
The Generac MLT4080 is powered by the Mitsubishi L3E-W461ML engine.
What is the oil capacity of the Generac MLT4080?
The Mitsubishi L3E-W461ML engine in the Generac MLT4080 has an oil capacity of 3.6 liters.
Which alternator is fitted to the Generac MLT4080?
The Generac MLT4080 uses a Marathon 201CSA5411 alternator. Insulation class F.
What oil filter does the Generac MLT4080 use?
The Generac MLT4080 uses oil filter part number 7665025430.
Which fuel filter part number does the Generac MLT4080 take?
The Generac MLT4080 uses fuel filter part number 13515.
Which air filter part number does the Generac MLT4080 take?
The Generac MLT4080 uses air filter part number 16444.
Troubleshooting
6Symptoms & remedies
| Symptom | Cause | Remedy |
|---|---|---|
| Low oil pressure shutdown | Low oil level | Verify oil level on dipstick. Add oil, if needed. |
| Oil leaking from engine | Visually inspect the engine for leaks. | |
| Oil pressure switch failure | Refer to OEM engine operator’s manual to identify corrective action. | |
| High coolant temperature shutdown | Low coolant level | Add coolant if needed. Allow engine to cool, then check coolant level in radiator. Restart engine and check coolant temperature. Stop engine immediately if coolant temperature is 210°F (99°C) or more. |
| Leakage in coolant hoses, engine block, or water pump | Inspect for visible leaks. Verify tension of water pump serpentine drive belt. | |
| Unit cranks, but will not start | Fuel level low | Check fuel level in tank. Verify fuel pump operation. |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing. Full Generac MLT4080 troubleshooting guide (20 entries) →
Parts
124| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 10386 | Belt, cold weather - Mitsu 6KW & 8 KW | 1 | Belt | Amazon eBay |
| 11042 | Gasket, exhaust manifold | 1 | Gasket | eBay |
| 11199 | Seal, axle bearing | 2 | Seal | Amazon eBay $289.99 |
| 11337 | Generator O-ring | 1 | Seal | eBay |
| 11366 | Solenoid, starter Mitsu | 1 | Starter | eBay $211.09 |
| 11456 | Gasket, lens | 1 | Gasket | eBay |
| 11628 | Kubota D905 V-belt | 1 | Belt | Amazon $144.49 eBay |
| 12213 | Mitsubishi, gasket, water pump | 1 | Gasket | eBay |
| 12214 | Mitsubishi, gasket, thermostat | 1 | Gasket | eBay FridayParts $325.45 |
| 12227 | Hose, oil drain .375 X 20, 30R7 | 1 | Hose | Amazon eBay |
| 12329 | Marathon 6KW pancake bearing seal | 1 | Seal | eBay |
| 12350 | Hose, radiator lower | 1 | Hose | Amazon eBay |
| 12486 | Alternator | 1 | Alternator | eBay |
| 12800 | 46-02 | 67, 1 | 35B63-01200 63 99 17 04300, 05 9 13 | 1 | Gasket | Amazon eBay $1170.53 FridayParts $26.86 |
| 12889 | Gasket, oil drain | 1 | Gasket | eBay |
| 12959 | Mitsubishi, gasket, intake manifold L3E | 1 | Gasket | eBay |
| 132-0375 | Sea Water Pump Impeller kit w/cover & gasket | Impeller | Amazon eBay FridayParts $26.00 | |
| 132-0379 | Sea Water Pump Impeller | Impeller | Amazon eBay $29.95 | |
| 13278 | Fuel pump, electric | 1 | Pump | Amazon eBay |
| 13373 | Gasket, lens oval | 1 | Gasket | eBay |
| 13481 | Kubota fuel filter assembly, D905 | 1 | Fuel filter | eBay |
| 13515 | Filter, fuel element, Kubota | 1 | Filter | Amazon eBay |
| 13876 | Kit, heater - fuel filter | 1 | Fuel filter | Amazon eBay |
| 14099 | Switch, coolant temperature | 1 | Sensor | eBay |
| 149-2106 | Fuel Filter Element | 1 | Fuel filter | Amazon $15.99 eBay $34.99 KuduParts $68.00 |
| 15146 | Filter, oil | 1 | Oil filter | eBay |
| 15375 | Sensor, Oil Pressure | 1 | Sensor | Amazon eBay |
| 16443 | Filter, air with bracket | 1 | Air filter | Amazon eBay |
| 16444 | Element, air filter | 1 | Air filter | Amazon $370.99 eBay |
| 16589 | Hose, air cleaner | 1 | Hose | eBay |
| 16677 | Switch, oil pressure | 1 | Sensor | eBay $22.99 FridayParts $83.99 |
| 16678 | Switch, coolant temperature | 1 | Sensor | eBay $60.01 |
| 16685 | Fuel filter head, element & fitting | 1 | Fuel filter | eBay KuduParts $38.00 |
| 16686 | Element, fuel filter | 1 | Fuel filter | eBay |
| 16687 | Hose, radiator upper | 1 | Hose | Amazon eBay KuduParts $63.00 |
| 16688 | Hose, radiator lower | 1 | Hose | Amazon eBay |
| 16691 | Filter, oil | 1 | Oil filter | Amazon $42.50 eBay |
| 16692 | V-belt, alternator | 1 | Belt | eBay $20.59 FridayParts $20.59 |
| 16693 | Glow plug, engine | 3 | Glow plug | eBay |
| 16743 | Alternator, Mitsubishi | 1 | Alternator | eBay $221.31 FridayParts $135.98 |
| 16744 | Water pump, Mitsubishi | 1 | Pump | Amazon eBay eBay |
| 16745 | Thermostat, Mitsubishi | 1 | Thermostat | eBay |
| 16769 | Lens, gasket | 1 | Gasket | eBay |
| 185-5421 | Plug, Glow | 4 | Glow plug | Amazon eBay $35.00 |
| 185-5835 | Filter, Oil | 1 | Oil filter | Amazon $33.27 eBay $21.78 FridayParts $20.19 |
| 185-6934 | V-Belt | Belt | Amazon $108.61 eBay $70.52 | |
| 185-7268 | Glow Plug (24 Volt) | Glow plug | Amazon eBay | |
| 300-1500 | Fuel Filter | 1 | Fuel filter | Amazon eBay $36.60 |
| 323-1544 | Thermostat | 1 | Thermostat | Amazon eBay |
| 324-1491 | Oil Filter | 1 | Oil filter | Amazon eBay |
| 324-1542 | Fuel Injection Pump | 1 | Pump | Amazon eBay |
| 50051 | HOSE, FUEL - .375 ID 50 PSI SAE 30R7 | 3 ft. | Hose | Amazon eBay |
| 612-6673 | Water Pump | 1 | Pump | Amazon eBay |
| 65649 | Heater, engine - low rad hose | 1 | Hose | Amazon eBay |
| M1679-2 | TWO F U E L LINES IN TANK FITTING | Fuel line | Amazon eBay | |
| 02076 | Unit ID Tag, Vin Tag | Service part / kit | Amazon eBay | |
| 100-3478-02 | Cruise Kit | 2 | Service part / kit | Amazon eBay |
| 11166 | Transformer, metal halide | 1 | Service part / kit | eBay |
| 11167 | Transformer, sodium light | 1 | Service part / kit | eBay |
| 11253 | Cap, grease - axis with rubber plug 3500# | 2 | Service part / kit | Amazon eBay $15.00 |
| 11254 | Plug, grease cap - for zerk (Axis) | 2 | Service part / kit | Amazon eBay $296.58 |
| 11275 | Decal, Magnum logo w/ web - red vinyl | 1 | Service part / kit | Amazon eBay $79.95 |
| 11277 | U-bolt, axle | 4 | Service part / kit | Amazon eBay $379.05 |
| 11278 | Tie plate, spring | 2 | Service part / kit | Amazon eBay $324.50 FridayParts $5489.60 |
| 11279 | Nut, locking | 8 | Service part / kit | Amazon eBay |
| 11280 | Spring, axle | 2 | Service part / kit | Amazon eBay |
| 11391 | Bulb, 1000W MH short length | 1 | Service part / kit | Amazon eBay |
| 11465 | Bulb - 1000W HPS short length | 1 | Service part / kit | eBay |
| 11555B | Weldment, removable tongue - 74" | 1 | Service part / kit | Amazon eBay |
| 12080 | Cap, fuel tank - vented, 3.5 dia. grn diesel only | 1 | Service part / kit | Amazon eBay FridayParts $39.99 |
| 12137 | Cap, fuel tank - vent 3.5 dia grn | 1 | Service part / kit | eBay $40.99 |
| 12141 | Decal set, LT eng/safety 4-lang | 1 | Service part / kit | Amazon eBay $13.60 |
| 12159 | Capacitor, 25 uF Marathon 6KW (201CSA5411) | 1 | Service part / kit | eBay |
| 12207 | Axle, 3500 lb. 56SC 68.5TC | 1 | Service part / kit | Amazon eBay $129.53 |
| 12262 | Decal, 4000/5000 set up 4-lang (MW) | 1 | Service part / kit | Amazon eBay $61.69 |
| 12328 | Marathon 6KW pancake bearing | 1 | Service part / kit | eBay $164.99 KuduParts $21.00 |
| 12880 | Decal, instruction 4000/5000 4-lang (EW) not shown | 1 | Service part / kit | Amazon eBay |
| 12881 | Decal, instruction 3000 4-lang (EW) | 1 | Service part / kit | Amazon eBay FridayParts $129.99 |
| 130-4434 | Zinc Pencil | 1 | Service part / kit | Amazon $48.66 eBay $34.17 |
| 13018 | Solenoid, fuel shutdown (2 wire) | 1 | Service part / kit | Amazon eBay |
| 13369 | Lens, glass oval | 1 | Service part / kit | eBay |
| 13381 | Socket, bulb | 1 | Service part / kit | eBay $62.63 |
| 13500 | Fuel, pick-up tube - 14.00 in. | 1 | Service part / kit | eBay FridayParts $210.68 |
| 14201 | Relay, auto shutdown | 1 | Service part / kit | Amazon eBay |
| 14217 | Bulb, metal halide | 1 | Service part / kit | eBay |
| 14679 | Capacitor, metal halide | 1 | Service part / kit | eBay |
| 14730 | Socket, light | 1 | Service part / kit | eBay |
| 14782 | Capacitor, sodium light | 1 | Service part / kit | eBay |
| 14783 | Ignitor, sodium light | 1 | Service part / kit | eBay |
| 14784 | Bulb, high pressure sodium | 1 | Service part / kit | eBay KuduParts $20.00 |
| 15492 | Suppressor | 1 | Service part / kit | eBay $244.45 |
| 15493 | Diode, rotor | 2 | Service part / kit | eBay |
| 15540 | Wheel, P205X75R15 radial w/rim | 2 | Service part / kit | Amazon eBay $14.36 |
| 15546 | Oil heater, pan - magnetic | 1 | Service part / kit | Amazon eBay |
| 15547 | Blanket, battery for 24 series | 1 | Service part / kit | Amazon eBay $14.97 |
| 15695 | Capacitor, 45uF Marathon | 1 | Service part / kit | eBay |
| 15798 | Capacitor, 50uF, 440VAC, 50/60 Hz, round | Service part / kit | eBay FridayParts $69.37 | |
| 16134 | Bearing, 6 kW | 1 | Service part / kit | eBay |
| 16683 | Solenoid, fuel shut-down | 1 | Service part / kit | eBay $137.25 KuduParts $33.00 |
| 185-6721 | Breather Filter Element | 1 | Service part / kit | Amazon eBay |
| 18556 | Regulator, voltage - SE 350 | 1 | Service part / kit | Amazon eBay FridayParts $158.99 |
| 19219 | Cap, pressure radiator | 1 | Service part / kit | Amazon eBay |
| 201CSA5411 | Marathon Electric Brushless generator, Insulation Class F | 1 | Service part / kit | eBay |
| 209649 | Form: SFC626B | 1 | Service part / kit | Amazon eBay |
| 36431 | SERVICE LOG | Service part / kit | Amazon eBay | |
| 40954 | Bearing, axle (inner) | 2 | Service part / kit | Amazon eBay |
| 60096 | Lug Nut, .500-20 (incl. w/axle) | 10 | Service part / kit | Amazon eBay $28.98 |
| 60674 | Wheel stud, axle | 10 | Service part / kit | Amazon eBay $26.25 |
| 60766 | Valve, drain 18mm-1.5 w/nipple | 1 | Service part / kit | Amazon eBay |
| 60774 | Valve, drain 22MM-1.5 w/nipple | 1 | Service part / kit | eBay |
| 65326 | Charger, battery - 2 amp, 3 stage | 1 | Service part / kit | eBay |
| CS1312-1 | CROSS-SECTION VIEW HULL STRAINER SEA COCK RECOMMENDED WATER STRAINER OR FILTER FLUSH THROUGH-HULL FITTING TO GENSET | Service part / kit | Amazon Amazon eBay eBay | |
| G3907-8824-0 | Service part / kit | Amazon | ||
| J110-STD | Service part / kit | Amazon | ||
| J116-STD | Service part / kit | Amazon | ||
| J119-SA | Service part / kit | Amazon | ||
| J119-STD | Service part / kit | Amazon | ||
| J320-STD | Service part / kit | Amazon | ||
| J324-STD | Service part / kit | Amazon | ||
| MILT3060 | 240 VAC 50 Amp Twistlock Outlets | 1 | Service part / kit | Amazon eBay |
| MIT3080 | 240 VAC 30 Amp Twistlock Outlets | 1 | Service part / kit | Amazon eBay $319.99 |
| S0310 | Service part / kit | Amazon | ||
| S0315 | Service part / kit | Amazon | ||
| S0520 | Service part / kit | Amazon |
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.
Available documents
Owner's manual — 10000045518 (Generac)Owner's manual — 10454 (Generac)