Kohler 4.5CM21 Specs (Power | Consumption)

The Kohler 4.5CM21 generator is listed with standby output of 4 kW, Gasoline fuel, 60 Hz operation, 120 V output, Single phase, and rated current of 37.5 A.

Kohler Generator Specifications

Generator • Gasoline • 60 Hz • Single phase

Standby power: 4 kWVoltage options: 120 VRated current: 37.5 ADry weight: 236 lb (107 kg)

Key specifications

4 kW Standby power

Gasoline Fuel

120 V Voltage options

Single phase Phase

37.5 A Rated current

236 lb (107 kg) Dry weight

60 Hz Frequency

Useful generator charts

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

Power-to-weight

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

This model

17 kW

Peer average

24.8 kW

33rd percentile

Model spec snapshot

Representative numeric specifications from this generator.

4 kWStandby

37.5 ACurrent

235.89 lbWeight

How the Kohler 4.5CM21 compares

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

Standby power

4 kW

48% below avg

13th percentile

Rated current

38 A

7% below avg

54th percentile

Dry weight

236 lb

33% below avg

36th percentile

Oil capacity

0.5 gal

39% below avg

22nd percentile

Standby power4 kW

Low 3 kWAverage 7.8 kWHigh 14 kW

About 48% below the similar-output Kohler average. Around the 13th percentile for this field.

Rated current38 A

Low 14 AAverage 40 AHigh 100 A

About 7% below the similar-output Kohler average. Around the 54th percentile for this field.

Dry weight236 lb

Low 130 lbAverage 354 lbHigh 785 lb

About 33% below the similar-output Kohler average. Around the 36th percentile for this field.

Oil capacity0.5 gal

Low 0.25 galAverage 0.81 galHigh 2.3 gal

About 39% below the similar-output Kohler average. Around the 22nd percentile for this field.

This model Peer average

Generator information

Manufacturer	Kohler
Model	4.5CM21
Generator type	Generator
Fuel	Gasoline
Frequency	60 Hz

Electrical output

Standby power	4 kW
Voltage options	120 V
Phase	Single phase
Rated current	37.5 A

Engine, cooling and controls

Engine model	Kohler K341QS
Rated engine speed	1800 rpm
Engine oil capacity	0.5 gal (1.9 L)
Oil capacity	0.5 gal (1.9 L)
Controller	Decision-Maker

Physical specifications

Dry weight	236 lb (107 kg)
Dimensions (L × W × H)	23.8 × 18.2 × 19.1 in (604 × 462 × 484 mm)

Battery

Battery voltage	12 V
Battery quantity	1

Maintenance and service parts

Engine oil	Specification: API service class SF; straight SAE 30 preferred (see viscosity chart)
Oil filter	Specification: 5.5CM/7CM only (full-flow oil filter); adds 0.5 qt oil capacity when replaced
Air filter	Interval: 200 hr; Specification: Clean element regularly; replace every 200 hours

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