Industrial diesel engines by brand

Pick your brand to see the range. If you are not sure which brand you need, jump to which job are you buying for.

Brand	What they are known for	Typical power range we supply
Perkins engines	Water-cooled engines from the compact 400 Series up to large generator engines. Huge worldwide parts and service base.	Compact 3-cylinder to large 6-cylinder
Deutz engines	German engineering: legendary air- and oil-cooled engines, and modern Stage V TCD water-cooled engines.	18 kW to 115 kW in our core range
Hatz engines	Compact, tough air-cooled single-cylinder and multi-cylinder engines for pumps, generators and small plant.	Small single-cylinder to 4-cylinder
Lister Petter engines	British engines with a long heritage in generators, pumps, marine and industrial use, including the TR, Alpha and LPW ranges.	Single-cylinder to 4-cylinder
Yanmar engines	Reliable Japanese engines, from the L-series air-cooled singles to the TNV water-cooled range.	Small single-cylinder to 4-cylinder
Rehlko (Kohler and Lombardini) engines	The KDI, KDW and 15LD ranges, still searched for under their Kohler and Lombardini names.	Single-cylinder to 4-cylinder
Kubota engines	Smooth, compact water-cooled engines found in mowers, compact plant and generators worldwide.	2-cylinder to 4-cylinder

Our range runs from small 3 kW single-cylinder air-cooled engines to six-cylinder engines of 100 kW and more. We have been supplying engines, generators and parts for nearly 70 years.

Which job are you buying an engine for?

Replacing a failed engine like for like

Have the serial number plate, the model code and a few photos to hand. The plate tells us the exact build, so we can usually confirm a like-for-like match or the nearest current equivalent.

Finding a modern equivalent for an older engine

Older engines are often discontinued. A current replacement may differ in mounting points, flywheel housing, controls or emissions level. Some conversions need modification, and we will say so before you order.

Choosing an engine for a new machine

Know the power you need, the duty (continuous or intermittent), the running speed, your preferred cooling type and the emissions stage that applies. Tell us the application and we will suggest a suitable rating. Request a quote when you are ready.

Types of industrial diesel engine

Air-cooled engines

Air-cooled engines, such as Hatz, Yanmar L-series, Lombardini 15LD and the classic Deutz 912/913, have no radiator, coolant or water pump. They are simple, start well in the cold and cope with dust and heat. Examples include the Yanmar L100V6.

Choose this if the engine will work somewhere remote or dusty, or you want as few cooling parts as possible.

Oil-cooled engines

Oil-cooled engines such as the Deutz 1011 and 2011 use the engine oil to carry heat away. They are compact and quiet, with few cooling parts to fail.

Choose this if you want a compact, quiet engine without a radiator.

Water-cooled engines

Water-cooled engines (Perkins, Kubota, Yanmar TNV, Rehlko KDI and Deutz TCD) run smoother and quieter, and are the basis of most modern Stage V machinery. See the Rehlko KDI-TCR 2504E5/26 for one example.

Choose this if you are building or repowering a machine that must meet current emissions rules.

Single-cylinder and multi-cylinder engines

Small single-cylinder engines suit pumps and small plant. Three- and four-cylinder engines are the usual choice for compact plant and generators, where smoother running matters. Engines can be naturally aspirated or turbocharged. A turbocharger generally gives more power from the same size of engine.

Diesel and petrol engines: the differences that matter

A petrol engine draws in a mix of air and fuel and ignites it with a spark plug. A diesel relies on compression alone to ignite the fuel. That makes diesels strong at low speed (high torque), and they generally use less fuel for the same work.

Why industrial users choose diesel

Torque at low revs suits loaded machinery. Fuel efficiency matters when an engine runs for long hours. Diesel engines also have a reputation for durability in continuous duty, and diesel fuel is usually already on site.

What industrial diesel engines are used for

Generators and power generation

Generator engines run at a fixed speed, often for long periods, so steady governing and fuel efficiency matter. Perkins, Lister Petter and Kubota engines are widely used here. See our diesel generators.

Pumps and compressors

These often run continuously at or near full load. Hatz and Lister Petter engines are common choices, and air-cooled designs suit sites without a water supply for cooling.

Construction and compact plant

Excavators and compact plant work at varying speed and load, so low-speed torque and compact size count. Kubota and Perkins are typical here. See our construction page.

Agriculture, groundcare and marine

Mowers and farm equipment need compact, smooth engines. Marine use is part of Lister Petter’s heritage.

Emissions rules: Stage V and beyond

New machines versus replacement engines

EU Stage V limits exhaust emissions from non-road engines. New machines sold in the UK and EU need engines that meet the stage for their power band, which is generally Stage V today. Replacing an engine in an existing machine can follow different rules, so tell us where the machine works. See Stage V engines and generators.

Engines for export markets

Overseas markets can use different standards, such as US EPA Tier levels. Always tell us the destination country.

Which industrial diesel engine brand is best?

There is no single best engine. The right one depends on application, duty, size and parts support where you are. We do not rank brands or name a “big three”.

What we can say is where each is strong. Perkins has a huge worldwide parts and service base. Deutz is known for air- and oil-cooled engines and modern Stage V TCD units. Hatz makes compact, tough air-cooled engines. Lister Petter is a British name with a long industrial heritage. Yanmar is known for reliability, and Rehlko covers the KDI, KDW and 15LD ranges. Kubota engines are smooth and compact.

Reliability depends heavily on correct sizing, regular servicing and clean fuel, whichever brand you choose.

Industrial diesel engine prices

We do not publish prices, because they depend on the engine and how it is specified. The main factors are:

• brand and model
• power and speed rating
• cooling type
• emissions stage
• whether you need a new engine or an alternative
• accessories such as starter, alternator, radiator and controls
• freight and packing

For a quote, send the serial number or model code, the application and the destination country through our quote form.

How we match an engine to your serial number

What to send us

• A photo of the serial plate
• Photos of the engine from two angles
• The model code
• What the engine powers
• Any flywheel or PTO details
• 50 Hz or 60 Hz, for generator sets

We confirm the exact build, power setting, fuel system, sump and fittings. Where the exact model is discontinued, we propose the nearest current engine and tell you what will need to change.

Parts and support after fitting

Sleemans has always been a spare parts business first. We carry filters, gaskets, overhaul kits, fuel injection parts, starters and alternators for the brands above, so we can keep your engine running once it is fitted.

Worldwide supply

We supply engines and parts to customers around the world, with export packing and shipping arranged to most countries. Many overseas customers are dealers and machine builders who need engines that are hard to find locally. Details of our consolidated shipping are on their own page.

Frequently asked questions