SDEC 24kW Diesel Engine 4Z2.7-G21

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Bradley: +27 62 743 5089 | bradley@sdecpower.co.za
Ruan: +27 66 511 2009 | ruan@sdecpower.co.za

We offer industry leading 24 month / 1,000 hour warranties on our engines and diesel generators.

The SDEC 24kW Diesel Engine (4Z2.7-G21) is a compact, high efficiency 2.7L liquid-cooled engine engineered for light commercial backup, residential estates, and small scale pump setups. Designed as a highly dependable engine for 20kVA to 22.5kVA generator configurations, this naturally aspirated inline 4-cylinder unit delivers reliable performance within a small physical footprint.

  • Power Performance: Delivers 24kW standby power output at a standard 1500 RPM (50Hz) and responds well to sudden operational loads.
  • Rugged Build: Features a high 18:1 compression ratio and a wet-liner block profile tailored for harsh South African and regional Sub-Saharan conditions.
  • Support & Logistics: Fully backed by The Generator King with expert technical support, prompt cross-border freight options, and immediate access to genuine OEM parts and spares.

We offer delivery across Sub-Saharan Africa at the best prices.

RELIABLE POWER GENERATION

SDEC was founded in 1947 and is a diesel engine manufacturer. They are ISO9001, QS9000 and TS16949 certified, which is testament to their quality and reliability.

GENERAL SPECIFICATIONS

SDEC 24kW Diesel Engine

Smart Design and Effective Cooling

The SDEC 4Z2.7-G21 engine uses a space saving vertical inline 4-stroke design with a wet-liner cylinder layout. This setup puts the cooling liquid directly against the cylinder walls, pulling heat away quickly to keep the engine running at a stable temperature during long power cuts.

Simple Mechanical Layout

Built with a straightforward overhead valve system—featuring one intake and one exhaust valve per cylinder, this engine reduces mechanical complexity. Fewer moving parts mean less wear and tear, lower maintenance needs, and highly reliable performance when your power drops.

Rugged Build and High Reliability

Built with a high strength cast iron block and an integrated cylinder head, this engine handles workloads without breaking a sweat. It is highly fuel efficient and delivers steady torque, making it a top choice for local generator builders and pump room engineers, powering commercial, agricultural, and industrial setups. The straightforward layout keeps maintenance simple and ensures the engine stays up and running under tough conditions.

Key Technical Features

  • Heavy-Duty Construction: The strong cylinder block and integrated head are built with top quality parts to extend the engine's working life.

  • Precision Manufacturing: Produced under strict SAIC Motor quality controls and world-class German production standards for excellent consistency and balanced performance.

  • Reliable Cold Starts: Starts up instantly without a pre-heater down to -10°C, and can handle freezing conditions as low as -30°C with an auxiliary heater attached.

  • Fuel Efficient: Meets Off-Road Stage II emission standards, ensuring a cleaner burn and highly efficient fuel consumption.

PRODUCT SPECIFICATIONS

Weight 260 kg
Dimensions 95.3 × 52.2 × 72.8 cm
Brand

SDEC

Product Type

Diesel Engine

Prime Power (kW)

22kW

Standby Power(kW)

24kW

Prime Power

20kVA

Standby Power

22.5kVA

Engine Type

In-line, 4 Strokes, 4 Valves, Water-cooled

Aspiration

Naturally Aspirated

Cylinder Type

Dry Liner

Cylinders

4 Cylinders

Bore × Stroke

90mm x 105mm

Displacement

2.7L

Compression Ratio

18 : 1

Firing Order

1-3-4-2

Injection Timing

14° – 17°

Flywheel Housing (SAE)

SAE NO.4

Flywheel Clutch Size (Inches)

SAE NO.7.5 (gear tooth number:115)

Fuel Consumption @ 100%

5.9 l/h

Fuel Consumption @ 75%

4.5 l/h

Fuel Consumption @ 50%

3.2 l/h

Fuel Consumption @ 25%

2.1 l/h

Injection Pump

KangDa

Governor

Electronic Regulator

Feed Pump

Mechanical Type

Injection Nozzle

Multi hole Type

Opening Pressure

24MPa

Fuel Filter

Full Flow, Cartridge Type

Fuel Type

Diesel Fuel Oil

Mechanism Type

Overhead Valve

Number of Valves

Intake: 1, Exhuast: 1 Per Cylinder

Valve Lashes - Cold

Intake: 0.35mm, Exhaust: 0.45mm

Lubrication Method

Fully Forced Pressure Feed Type

Oil Pump

Gear Type Driven by Crankshaft

Oil Filter

Full Flow, Cartridge Type

Oil Pan Capacity

High Level: 7 litres, Low Level: 6 litres

Lubrication Angularity Limit

Front Down: 25 degrees, Front Up: 35 degrees, Side to Side: 35 degrees

Lubrication Oil

Refer to Operation Manual

Intake Valve Timing

Opening: 11°BTDC, Closing: 41°ABDC

Exhaust Valve Timing

Opening: 49°BBDC, Closing: 11°ATDC

Cooling Method

Fresh Water Forced Circulation

Water Capacity (Engine Only)

5.75 litres

Lid Minimum Pressure

70kPa

Water Pump

Centrifugal Type Driven by Belt

Water Pump Capacity

155L/min

Thermostat

Wax–pellet Type. Opening Temp. 72°C, Full Open Temp. 82°C

Cooling Fan

Plastic Blower. 420 mm diameter, 7 blades

Heat Rejection to Coolant

2.4 kcal/sec

Air Flow

2.3 kcal/sec

Exhaust Gas Flow

5.7m3/min

Exhaust Gas Temperature

480 °C

Maximum Permissible Altitude

2000 m

Charging Generator

14V×35A

Voltage Regulator

Built-in IC Regulator

Starting Motor

12V×3.8kW

Battery Voltage

12V

Battery Capacity

120 AH

Category:
A partner in power generation

World-Class Manufacturing, Fast Regional Distribution

We source and manufacture high-quality generators, engines, and parts directly from leading global factories, including SDEC. By dealing with us directly, you cut out the middlemen, saving you time and money.

Every engine, alternator, and spare part we supply is built to international standards and fully tested to handle South African conditions. Whether you are a local generator builder looking for loose components or a business needing a complete commercial power setup, we ensure fast delivery, guaranteed stock availability, and dependable performance.

SDEC FACTORY | ROBOTIC ENGINE MANUFACTURING ASSEMBLY LINE

Our Delivery Channels

Sub-Saharan Logistics

We ship SDEC engines, diesel generators, alternators and parts throughout South Africa and across the continent, including Namibia, Botswana, Malawi, Mozambique, Zambia, Zimbabwe, Swaziland, and Lesotho.

Our team handles the entire logistics process, from factory  loading to cross-border transport, ensuring your equipment arrives safely and on time.

We hold a large volume of stock and genuine replacement parts at our warehouses so we can supply clients across Africa quickly and efficiently.

FREQUENTLY ASKED QUESTIONS

Does the price include installation?

No, installation is not included in the price. Any qualified electrician can install the kit and provide a Certificate of Compliance (COC) for the installation as per legislation.

Do you offer installation?

No, we do not offer any installation services, but, any qualified electrician can install our products.

Does the price include delivery?

Delivery is not included in any of the prices. However, delivery will be calculated in your cart at checkout based on your location and product selection.

Tell me about the Warranty

Our product warranty is detailed on each product page and as per our standard terms along with a valid COC. It is a limited warranty.

Price validity

All pricing is valid while stocks last as reflected on your quotation, as specified therein.Â