Cummins Onan 4KY Specs (Power | Fuel Consumption)

The Cummins Onan 4KY generator is listed with standby output of 4 kW, gasoline fuel, 60 Hz operation, 120 V, 230 V output, Single phase, and rated current of 33.3 A.

Cummins Onan Generator Specifications

Generator • gasoline • 60 Hz • Single phase

Standby power: 4 kWVoltage options: 120 V, 230 VRated current: 33.3 ADry weight: 174 lb (79 kg)

Key specifications

4 kW Standby power

gasoline Fuel

120 V, 230 V Voltage options

Single phase Phase

33.3 A Rated current

174 lb (79 kg) Dry weight

60 Hz Frequency

Useful generator charts

Charts are shown only when this model has enough usable source data.

Fuel consumption by load

How fuel use changes as generator load increases.

No load

0.29 gal/hr

50% load

0.48 gal/hr

100% load

0.71 gal/hr

Power-to-weight

Standby output per 1,000 lb of dry weight versus similar-output Cummins Onan models.

This model

23 kW

Peer average

24.1 kW

89th percentile

Power output

Low 4 kW High 4,000 kW

Standby

4 kW

Prime

4,000 kW

Model spec snapshot

Representative numeric specifications from this generator.

4 kWStandby

33.3 ACurrent

174.17 lbWeight

How the Cummins Onan 4KY compares

This compares the supplied numeric specification with Cummins Onan generators in the same broad standby-power class where enough comparable data exists.

Standby power

4 kW

36% below avg

36th percentile

Rated current

33 A

9% above avg

63rd percentile

Dry weight

174 lb

75% below avg

28th percentile

Oil capacity

0.4 gal

49% below avg

27th percentile

Standby power4 kW

Low 1 kWAverage 6.2 kWHigh 14 kW

About 36% below the similar-output Cummins Onan average. Around the 36th percentile for this field.

Rated current33 A

Low 5 AAverage 30 AHigh 80 A

About 9% above the similar-output Cummins Onan average. Around the 63rd percentile for this field.

Dry weight174 lb

Low 37 lbAverage 690 lbHigh 3,525 lb

About 75% below the similar-output Cummins Onan average. Around the 28th percentile for this field.

Oil capacity0.4 gal

Low 0.15 galAverage 0.78 galHigh 1.66 gal

About 49% below the similar-output Cummins Onan average. Around the 27th percentile for this field.

This model Peer average

Generator information

Manufacturer	Cummins Onan
Model	4KY
Generator type	Generator
Fuel	gasoline
Frequency	60 Hz

Electrical output

Standby power	4 kW
Prime power	4000 kW
Voltage options	120 V, 230 V
Phase	Single phase
Rated current	33.3 A

Engine, cooling and controls

Engine model	Cummins/Onan KYD
Engine displacement	19 cu in (0.304 L)
Aspiration / cooling	Air Cooled
Rated engine speed	3600 rpm
Engine oil capacity	0.4 gal (1.5 L)
Oil capacity	0.4 gal (1.5 L)
Controller	Microprocessor Regulated

Physical specifications

Dry weight	174 lb (79 kg)

Battery

Battery cranking	450 CCA
Battery voltage	12 V

Fuel system and runtime

Tank runtime	0.7 / 1 / 1.5 hr

Fuel consumption

Standby	0.29 gal/h (1.1 L/h) @ 50%; 0.48 gal/h (1.8 L/h) @ 100%; 0.71 gal/h (2.7 L/h)
Full load	2.7 gal/h (0.71 L/h)
Half load	1.8 gal/h (0.48 L/h)
No load	1.1 gal/h (0.29 L/h)

Maintenance and service parts

Engine oil	Part number: 15W40; Interval: 20 hr; Specification: Change the oil if the viscosity indicated is not appropriate for the temperatures expected.; Capacity: 1.6 l
Oil filter	Interval: 150 hr
Fuel filter	Interval: 450 hr
Air filter	Interval: 30 hr
Coolant	Interval: 250 hr

Disclaimer: Specifications should be verified against the official owner’s or service manual and confirmed on the Cummins North America generator website.