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Kohler 90REOZT4 Generator Set

The Kohler 90REOZT4 is a 85 kW (106 kVA) Diesel standby generator set powered by a John Deere PowerTech 6.8L engine. It is available at 120/208 V, 120/240 V, 277/480 V and 347/600 V, 60 Hz. It holds about 21 L (5.5 gal) of oil and 26.1 L (6.9 gal) of coolant, with a maximum ambient rating of 50 °C. Starting uses 1 battery rated 450 CCA at 12 V. The set measures 2951×1119×2156 mm (116.2×44.1×84.9 in), weighs about 2542 kg (5604 lb) and produces 69 dBA at 7 m. An integrated tank holds 727 L (192.1 gal), roughly 24 hours of runtime.

85 kW
Standby
6.8 L
Displacement
21.0 L
Oil capacity
4
Document types

How to read your Kohler serial & model number →

Typical fuel consumption for 85–90 kW Diesel generators →

Compare with other 85–90 kW Diesel generators →

Service parts for the 90REOZT4

Grouped by system, with how many of each the parts manual calls for.

Air intake

1 required

Prices captured from merchant listings; some links are affiliate links. Confirm against your serial number before ordering.

Specifications

FuelDiesel
Frequency60.0 Hz
Standby power85 kW
Standby kVA106
Prime power76 kW
EmissionsFT4
ControllerDecision-Maker 3500
Oil capacity21.0 L
Alternator4R9X
Voltage options120/208 V, 120/240 V, 277/480 V, 347/600 V
Circuit breaker400 A
Battery cranking450 CCA
Battery voltage12 V
Battery quantity1
Coolant capacity26.1 L
Max ambient50 °C
Dimensions (L×W×H)2951×1119×2156 mm
Dry weight2542 kg
Sound level69.0 dBA @ 7 m
Fuel tank727.0 L
Tank runtime24 hr

Engine

John Deere PowerTech 6.8L
Displacement6.8 L
Aspirationturbocharged
Rated speed2150 rpm

Filters for the John Deere PowerTech 6.8L

4

Engine-mounted filters the filter manufacturers list for this engine family. These come from the engine, not from this generator set’s own parts list, so confirm against your serial number before ordering.

Listed for this engine in only one kind of machine, so they may depend on how the engine was installed:

SystemFilterDescriptionCross-references
Oil filterP550779Lube Filter, Spin-On Full FlowJOHN DEERE RE504836, JOHN DEERE RE50486, NAPA 7750S, SKYJACK 13502869 KuduParts $19.00
Oil filterP551352Lube Filter, Spin-On Full FlowJOHN DEERE DZ118286, JOHN DEERE PMLF3703, NAPA 401062, BALDWIN B40168 buy
Fuel / water separatorP551422Fuel Filter, Water Separator CartridgeJOHN DEERE AT274723, JOHN DEERE RE22878, NAPA 3978, CLAAS 0011318200 KuduParts $22.00 FridayParts $24.50
Fuel / water separatorP551424Fuel Filter, Water Separator Spin-OnJOHN DEERE RE503198, JOHN DEERE RE522868, NAPA 3532, NAPA 600094 KuduParts $16.00 FridayParts $18.50

Maintenance & consumables

for the John Deere PowerTech 6.8L
ItemSpecCapacityPart #Interval
Air filterHeavy Duty Air CleanerGM94203 Amazon eBay
Fuel filterPrimary—
Oil filterCartridge×1—

Compatible filters for the John Deere PowerTech 6.8L — cross-referenced via Donaldson. Options to verify against your serial number, not confirmed for this exact unit.

Common questions

What size generator is the Kohler 90REOZT4?

The Kohler 90REOZT4 is rated 85 kW standby (106.0 kVA).

Which engine powers the Kohler 90REOZT4?

The Kohler 90REOZT4 is powered by the John Deere PowerTech 6.8L engine.

Is the Kohler 90REOZT4 diesel or gas?

The Kohler 90REOZT4 runs on Diesel.

What is the cooling system capacity of the Kohler 90REOZT4?

The Kohler 90REOZT4 cooling system holds 26.1 liters (6.9 US gallons) for the radiator system including the engine, per the manufacturer specification sheet.

How much oil does the Kohler 90REOZT4 take?

The Kohler 90REOZT4 has an engine oil capacity of 21 liters (22.2 US quarts), per the manufacturer specification sheet.

What is the prime power rating of the Kohler 90REOZT4?

The Kohler 90REOZT4 is rated 76 kW prime (95 kVA), against 85 kW standby.

How loud is the Kohler 90REOZT4?

The Kohler 90REOZT4 is rated at 69.0 dBA at 7 m, per the manufacturer specification sheet.

How much does the Kohler 90REOZT4 weigh?

The Kohler 90REOZT4 has a dry weight of 2542 kg (5604 lb).

How big is the fuel tank on the Kohler 90REOZT4?

The Kohler 90REOZT4 has a 727 liter (192 US gallon) fuel tank, giving about 24 hours of runtime.

What voltage does the Kohler 90REOZT4 produce?

The Kohler 90REOZT4 is offered in 120/208 V, 120/240 V, 277/480 V, 347/600 V.

How many cold cranking amps does the Kohler 90REOZT4 require?

The Kohler 90REOZT4 uses 1 battery, 12 V each, 450 CCA, per the manufacturer specification sheet.

What alternator comes on the Kohler 90REOZT4?

The Kohler 90REOZT4 uses a 4R9X alternator.

Which oil filter part number does the Kohler 90REOZT4 take?

The Kohler 90REOZT4 uses oil filter part numbers KOHLER GM32809, KOHLER 360031.

Which fuel filter part number does the Kohler 90REOZT4 take?

The Kohler 90REOZT4 uses fuel filter part numbers KOHLER GM50006, KOHLER 336661.

What air filter does the Kohler 90REOZT4 use?

The Kohler 90REOZT4 uses air filter part number GM94203.

Parts

51
Part #DescriptionQtySystem
GM100703Element, Primary1Air filter Amazon eBay
GM100704Element, Safety1Air filter Amazon eBay
GM62396Hose, Reducer1Hose Amazon eBay
GM94203Heavy Duty Air Cleaner1Air filter Amazon eBay
10000015220Panel, rear1Service part / kit Amazon eBay
10000015222Duct, rear1Service part / kit Amazon eBay
10000024262Decal, phase switch warning1Service part / kit Amazon eBay
10000024936Right rear corner assembly1Service part / kit Amazon eBay
10000024948Front hood assembly1Service part / kit Amazon eBay
10000024956Rear panel assembly1Service part / kit Amazon eBay
10000024971Foam, duct - side1Service part / kit Amazon eBay
10000024974Foam, rear duct - right1Service part / kit Amazon eBay
10000024975Left rear corner assembly1Service part / kit Amazon eBay
10000024976Left rear door assembly1Service part / kit Amazon eBay
10000024982Foam, control door1Service part / kit Amazon eBay
10000024983Foam, rear duct1Service part / kit Amazon eBay
10000024994Foam, rear duct - left1Service part / kit Amazon eBay
10000025002Foam, rear panel1Service part / kit Amazon eBay
10000027288Door, control - paralleling option1Service part / kit Amazon eBay
10000029864Decal set, MDG75 mechanical group1Service part / kit Amazon eBay
10000030536Foam, control door - paralleling option1Service part / kit Amazon eBay
10000030555Right rear corner assembly - paralleling1Service part / kit Amazon eBay
10000030564End panel assembly2Service part / kit Amazon eBay
10000030582Control door assembly - paralleling1Service part / kit Amazon eBay
100REOZJ4Stationary non-emergency gen-setsService part / kit Amazon eBay
12142Decal, ground1Service part / kit Amazon eBay NAPA $74.66
20677WDuct, rear air1Service part / kit Amazon eBay
20795SRVFoam, corner common1Service part / kit Amazon eBay
20798SRVFoam, duct - face1Service part / kit Amazon eBay
20916ZBracket, prop rod1Service part / kit Amazon eBay
26386Decal, Pinch Point1Service part / kit Amazon eBay NAPA $45.89
30401WPanel, end2Service part / kit Amazon eBay
30402SRVFoam, end panel2Service part / kit Amazon eBay
30645Panel, emergency stop1Service part / kit Amazon eBay
32107WPanel, left rear1Service part / kit Amazon eBay
32124WPanel, side3Service part / kit Amazon eBay
32125SRVRoof assembly1Service part / kit Amazon eBay
32286SRVFoam, side panel3Service part / kit Amazon eBay
33313SRVControl door assembly1Service part / kit Amazon eBay
33642Window, control door - UV1Service part / kit Amazon eBay
34989SRVAssembly, E-stop switch1Service part / kit Amazon eBay
393531Side panel assembly3Service part / kit Amazon eBay
50876Decal, positive battery disconnect1Service part / kit Amazon eBay
51552Decal, high temp1Service part / kit Amazon eBay $29.61
60095Nut, .312-18 sflg2Service part / kit Amazon eBay
60268Rivet, .188 dia. x .126 to .250 grip, SS4Service part / kit Amazon eBay
60505Nut, .312-18 U-clip - long type4Service part / kit Amazon eBay
61091Screw, .312-18 x 1.00 ser flg hd14Service part / kit Amazon eBay
65470Switch, E-stop operator1Service part / kit Amazon eBay NAPA $61.00
65580Block, E-stop contactor - NC1Service part / kit Amazon eBay
80REOZJ4Stationary non-emergency gen-setsService 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

RatingLoadL/hgal/h
Prime1.50.4
Prime25%7.01.0
Prime50%11.73.1
Prime75%16.64.4
Prime100%22.15.8
Standby1.50.4
Standby25%7.41.9
Standby50%12.73.4
Standby75%18.24.8
Standby100%24.46.4

Available documents

Spec sheet — g5416 (Kohler)Reference — Diesel Mobile Expansion (Kohler)Reference — KOHLERReference — Mobile Rental Generators (Kohler)Owner's manual — tp6895 (Kohler)Parts manual — tp6894 (Kohler)

This page was generated from the 6 manufacturer documents above by automated extraction; every figure shown is copied from one of them. How the data is compiled.

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