SDEC 338kW Diesel Engine 6ETAA11.8-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 338kW Diesel Engine (6ETAA11.8-G21) is a high-capacity 11.8L inline 6-cylinder engine engineered to anchor heavy-duty commercial and civic power systems. Purpose built for 350kVA to 375kVA generators, this E Series model uses an air-to-air turbocharger to deliver unwavering frequency stability during severe load transitions.

  • Power Output: Provides a 338kW standby rating at 1500 RPM (50Hz), easily absorbing sudden load steps.
  • Advanced Induction: Utilises a powerful turbocharger and an air-to-air aftercooler to maintain high efficiency.
  • Rugged Build: Built around a heavy duty dry-liner block with a 24V starting motor for extreme environments.
  • Logistics & Support: Fully backed by The Generator King with technical support, extensive spare parts visibility and efficient cross border freight.

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 338kW Diesel Engine

Powerful Performance

The SDEC 6ETAA11.8-G21 leverages its massive 11.8L displacement alongside an advanced air-to-air aftercooler. By forcing chilled, dense air into the combustion chambers, preventing voltage dips and frequency instability when high demand equipment, machinery or pumping stations kick in simultaneously.

Built for Critical Infrastructure

Designed to survive the severe grid instabilities and high ambient temperatures typical of Sub-Saharan operations, this engine relies on a durable dry-liner block layout. The inclusion of a standardised SAE No. 1 flywheel housing and a heavy duty 24V starting setup ensures the unit fires up immediately during critical blackouts, safeguarding operations that require runtime continuity.

Reliability and Low Complexity

Cast from high strength iron with an integrated cylinder head, this 11.8L block is engineered to handle demanding load cycles. The 4-valve configuration ensures precise fuel atomisation and steady torque output, making it highly dependable for regional generator assemblers and engineers supporting manufacturing lines and agricultural hubs. By using integrated parts to reduce the total component count, the engine eliminates unnecessary mechanical failure points, which simplifies on-site servicing and keeps long-term operating costs down.

Core Technical Specifications

  • Optimised Combustion: The 4-valve layout and integrated head use top tier international components to improve thermal distribution and extend the working lifespan of the block.

  • Strict Quality Control: Manufactured under the strict quality of SAIC Motor and verified by world class German automotive production systems to ensure exceptional build consistency.

  • Cold Start Reliability: Fires up instantly without an intake pre-heater in temperatures as low as -10°C, and down to -30°C when equipped with an auxiliary heating device.

  • Stage II Compliance: Engineered to meet Off-Road Stage II emission standards, ensuring a cleaner fuel burn and highly efficient consumption profiles.

PRODUCT SPECIFICATIONS

Weight 1164 kg
Dimensions 178.7 × 91.7 × 130.4 cm
Brand

SDEC

Product Type

Diesel Engine

Prime Power (kW)

307kW

Standby Power(kW)

338kW

Prime Power

350kVA

Standby Power

375kVA

Engine Type

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

Aspiration

Turbo Charged with Air-to-Air Intercooling

Cylinder Type

Dry Liner

Cylinders

6 Cylinders

Bore × Stroke

128mm x 153mm

Displacement

11.8L

Compression Ratio

17 : 1

Firing Order

1-5-3-6-2-4

Injection Timing

14.5°BTDC

Flywheel Housing (SAE)

SAE NO.1

Flywheel Clutch Size (Inches)

SAE NO.14

Fuel Consumption @ 100%

73.3 l/h

Fuel Consumption @ 75%

53.7 l/h

Fuel Consumption @ 50%

37 l/h

Fuel Consumption @ 25%

21 l/h

Injection Pump

Longkou Inline “P” Type

Governor

Electronic Regulator

Feed Pump

Mechanical Type

Injection Nozzle

Multi hole Type

Opening Pressure

250 kg/cm2

Fuel Filter

Full Flow, Cartridge Type

Fuel Type

Diesel Fuel Oil

Mechanism Type

Overhead Valve

Number of Valves

Intake: 2, Exhaust: 2 Per Cylinder

Valve Lashes - Cold

Intake: 0.40mm, Exhaust: 0.65mm

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: 41 litres, Low Level: 33 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: 15°BTDC, Closing: 30°ABDC

Exhaust Valve Timing

Opening: 45°BBDC, Closing: 13°ATDC

Cooling Method

Fresh Water Forced Circulation

Water Capacity (Engine Only)

23.2 litres

Lid Minimum Pressure

70kPa

Water Pump

Centrifugal Type Driven by Belt

Water Pump Capacity

515L/min

Thermostat

Wax–pellet Type. Opening Temp. 85°C, Full Open Temp. 95°C

Cooling Fan

Plastic Blower, 843mm diameter, 8 blades

Heat Rejection to Coolant

30.9 kcal/sec

Exhaust Gas Flow

76 m3/min

Exhaust Gas Temperature

600 °C

Charging Generator

28V×55A

Voltage Regulator

Built-in IC Regulator

Starting Motor

24V×7.5 kW

Battery Voltage

24V

Battery Capacity

180 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.