The John Deere 6090HFG86 is a 9 L 6-cylinder 4-cycle, turbocharged, charge air-cooled engine rated at 1800 rpm, producing up to 345 kW. It powers generator sets from Kohler and MTU, including the 300REOZJ and 6R0150 DS300. It holds 33.4 L (8.8 gal) of oil and 16 L (4.2 gal) of coolant.
Also known as: John Deere 6090HFG86
Part of the John Deere 6090 engine family — 27 variants share parts & fitment.
The cheapest captured merchant offer per filter — see the full cross-reference below for every OEM/aftermarket option.
Prices captured from merchant listings; some links are affiliate links. Verify against your serial number before ordering.
| Oil capacity | 33.4 L |
|---|---|
| Coolant capacity | 16.0 L |
| Displacement | 9.0 L |
| Cylinders | 6 |
| Aspiration | 4-Cycle, Turbocharged, Charge Air-Cooled |
| Rated speed | 1800 rpm |
| Gross power | 345 kW |
Shared across brands: Kohler, MTU
| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Dry | — | |||
| Fuel filter | 10 Microns | GM50263 | Amazon eBay $99.99 | ||
| Oil filter | 1, Cartridge | GM48731 | Amazon eBay $49.99 NAPA $3.59 |
Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.
| Type | Item | Value | Unit | Condition |
|---|---|---|---|---|
| Other | 10 in. weld flange bolt circle diameter B | 361.95 | mm (14.25 in.) | |
| Other | 10 in. weld flange outside diameter C | 406.4 | mm (16.0 in.) | |
| Other | 10 in. weld flange quantity of bolts / bolt hole diameter D | 12, 25.40 | mm (1.00 in.) | |
| Other | 12 in. weld flange bolt circle diameter B | 431.80 | mm (17.00 in.) | |
| Other | 12 in. weld flange outside diameter C | 482.6 | mm (19.0 in.) | |
| Other | 12 in. weld flange quantity of bolts / bolt hole diameter D | 12, 25.40 | mm (1.00 in.) | |
| Other | 14 in. weld flange bolt circle diameter B | 476.25 | mm (18.75 in.) | |
| Other | 14 in. weld flange outside diameter C | 533.4 | mm (21.0 in.) | |
| Other | 14 in. weld flange quantity of bolts / bolt hole diameter D | 12, 28.58 | mm (1.13 in.) | |
| Other | 16 in. weld flange bolt circle diameter B | 539.75 | mm (21.25 in.) | |
| Other | 16 in. weld flange outside diameter C | 596.9 | mm (23.5 in.) | |
| Other | 16 in. weld flange quantity of bolts / bolt hole diameter D | 16, 28.58 | mm (1.13 in.) | |
| Other | 18 in. weld flange bolt circle diameter B | 577.85 | mm (22.75 in.) | |
| Other | 18 in. weld flange outside diameter C | 635.0 | mm (25.0 in.) | |
| Other | 18 in. weld flange quantity of bolts / bolt hole diameter D | 16, 31.75 | mm (1.25 in.) | |
| Other | 20 in. weld flange bolt circle diameter B | 635.00 | mm (25.00 in.) | |
| Other | 20 in. weld flange outside diameter C | 698.5 | mm (27.5 in.) | |
| Other | 20 in. weld flange quantity of bolts / bolt hole diameter D | 20, 31.75 | mm (1.25 in.) | |
| Other | 5 in. weld flange bolt circle diameter B | 215.90 | mm (8.50 in.) | |
| Other | 5 in. weld flange outside diameter C | 241.30 | mm (9.50 in.) | |
| Other | 5 in. weld flange quantity of bolts / bolt hole diameter D | 8, 22.23 | mm (0.88 in.) | |
| Other | 6 in. weld flange bolt circle diameter B | 254.0 | mm (10.0 in.) | |
| Other | 6 in. weld flange outside diameter C | 279.4 | mm (11.0 in.) | |
| Other | 6 in. weld flange quantity of bolts / bolt hole diameter D | 8, 22.23 | mm (0.88 in.) | |
| Other | 8 in. weld flange bolt circle diameter B | 298.45 | mm (11.75 in.) | |
| Other | 8 in. weld flange outside diameter C | 342.9 | mm (13.5 in.) | |
| Other | 8 in. weld flange quantity of bolts / bolt hole diameter D | 8, 22.23 | mm (0.88 in.) | |
| Other | Weld flange angle A (10, 12, 14 in. nominal pipe size) | 30 | deg. | |
| Other | Weld flange angle A (16, 18, 20 in. nominal pipe size) | 22.5 | deg. | |
| Other | Weld flange angle A (5, 6, 8 in. nominal pipe size) | 45 | deg. |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
| Fluid | Grade | Standard | Ambient | Capacity | Notes |
|---|---|---|---|---|---|
| Engine oil | Kohler Genuine oil | Kohler recommends the use of Kohler Genuine oil and filters. | |||
| Fuel | #2 Diesel | Recommended fuel | |||
| Fuel | Diesel #2 | Recommended Fuel for diesel gensets (e.g. DS30, DS40, DS50, DS80, DS100, DS125, DS150, DS180, DS200, DS230, DS250, DS275, DS300, DS350, DS400, DS450, DS500) |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
| Voltage | Phase | Connection | Leads | Notes |
|---|---|---|---|---|
| 208V | 3 | 12 LEAD WYE | Example from MTU 4R0063 GS30 | |
| 240V | 1 | 12 LEAD | Example from MTU 4R0063 GS30 SYSTEM RATINGS connection row | |
| 240V | 1 | 4 LEAD | Example from MTU 4R0063 GS30 | |
| 240V | 3 | 12 LEAD DELTA | Example from MTU 4R0063 GS30 | |
| 380V | 3 | 12 LEAD WYE | Example from MTU 4R0063 GS30 | |
| 480V | 3 | 12 LEAD WYE | Example from MTU 4R0063 GS30 | |
| 600V | 3 | 4 LEAD WYE DOUBLE DELTA | Example from MTU 4R0063 GS30 |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
| Part # | Description | Category |
|---|---|---|
| AT387574 | ALTERNATOR | Alternator |
| RE500226 | ALTERNATOR | Alternator |
| RE551447 | ALTERNATOR | Alternator |
| RE551448 | ALTERNATOR | Alternator |
| RE558676 | ALTERNATOR | Alternator |
| RE65414 | ALTERNATOR | Alternator |
| SE501838 | ALTERNATOR (REMAN FOR AT387574) (24V, 100A) (3152) | Alternator |
| SE502563 | ALTERNATOR | Alternator |
| 4UA10 | 15 Relay I/O Board | Battery |
| DZ118761 | FAN BELT | Belt |
| DZ118995 | FAN BELT | Belt |
| R519476 | FAN BELT | Belt |
| SE501759 | CONNECTING ROD (REMAN FOR DZ122131) | Connecting rod |
| SE502800 | CONTROLLER | Controller |
| SE501747 | CYLINDER HEAD | Cylinder head |
| PFF51674 | Secondary Fuel Element (OEM: RE506428) | Fuel filter |
| PFF5551 | Primary & Secondary Fuel Kit (OEM: RE525523, RE527961) | Fuel filter |
| RE520906 | PRIMARY FUEL FILTER | Fuel filter |
| RE525523 | Fuel filter | Fuel filter |
| RE527961 | FUEL FILTER | Fuel filter |
| SE501947 | FUEL INJECTION NOZZLE (REMAN FOR DZ100221) | Fuel injection nozzle |
| SE501948 | FUEL INJECTION NOZZLE | Injector |
| RE509672 | OIL FILTER | Oil filter |
| RE530346 | OCV FILTER | Oil filter |
| APM303 | Control Panel | Service part / kit |
| CB125100-200 | Coolant heater, 2500W, 120V | Service part / kit |
| CB125110-200 | Coolant heater, HotStart, 2500W, 120V | Service part / kit |
| D-292865 | Battery charger, 120/240V, 5.1/3A | Service part / kit |
| DZ121193 | SHORT BLOCK ASSEMBLY | Service part / kit |
| GM106699-S | Battery (Kohler) | Service part / kit |
| M3227 | Canopy | Service part / kit |
| R518277 | CRANKSHAFT PULLEY | Service part / kit |
| RE520465 | TORSIONAL DAMPER | Service part / kit |
| RE537960 | TORSIONAL DAMPER | Service part / kit |
| RE57604 | TORSIONAL DAMPER | Service part / kit |
| SE501748 | CONNECTING ROD (REMAN FOR DZ122131) | Service part / kit |
| SE502847 | COMPLETE BLOCK ASSEMBLY | Service part / kit |
| SE501228 | WATER PUMP (REMAN FOR RE530194) | Pump |
| SE501922 | FUEL INJECTION PUMP (REMAN FOR RE571640) | Pump |
| RE506103 | STARTER | Starter |
| RE529661 | STARTER | Starter |
| RE556999 | STARTER | Starter |
| RE564633 | STARTER | Starter |
| SE501866 | STARTER (REMAN FOR RE506103) (24 V) | Starter |
| SE502374 | TURBOCHARGER | Turbocharger |
Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.
Parts listed by aftermarket suppliers as fitting this engine — leads compiled from supplier catalogs; verify the exact part for your serial number.
Cross-referenced via Donaldson + OEM/engine-maker interchange — options to verify against your serial number, not confirmed for every exact variant.
Other equipment known to use this engine, via filter-application cross-reference — useful for sourcing parts even when your exact machine isn't listed elsewhere on this page.
The John Deere 6090HFG86 engine has an oil capacity of 33.4 liters.
The John Deere 6090HFG86 has a displacement of 9.0 liters with 6 cylinders.
The John Deere 6090HFG86 powers 2 generator set(s), including Kohler 300REOZJ, MTU 6R0150 DS300.
The John Deere 6090HFG86 uses oil filter part numbers John Deere RE538245, Donaldson P550938, Wix 51370.
The John Deere 6090HFG86 uses air filter part numbers John Deere RE587794, John Deere 4S00686R, John Deere AH115833.