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Exceeding Power and Environmental Expectations
Designed with Yanmar's proprietary direct injection technology, maximum combustion efficiency is realized through the ideal match between the combustion chamber and injection system. This means a powerful but environmentally friendly engine.

Compact, Direct injection engine means easy installation and low fuel consumption
Keeping with the tradition of compact design, the new L-N series are simple to install. It fits in cramped spaces without sacrificing power and performance. Yanmar's proprietary direct injection technology allows the engine to sip rather than gorge on fuel. This means lower running cost in the world of rising fuel prices.

Low vibration and low noise
Superior vibration and noise reduction is achieved through the use of precision balancers. This leads to operating comfort even under long work hours.

Quick and easy to start
Starting is a breeze with the standard recoil starter. Starter motor and switch are also available as an option.

The total FIE expertise only a complete diesel maker can provide
Yanmar developed the miniaturized fuel injection system, one of the world's smallest. We have since raised it to a level of efficiency that ensures you maximum power from every drop of diesel. Its extraordinarily low fuel consumption is a result of this super-precise FIE and its direct injection system — the first ever to go into this type of engine.

A little engine built to stand up to hard work
The design, structure, and materials of the L-N combine to form a rugged, hard working machine. With tough but lightweight alloys used for main engine parts, an extra tough crankshaft, and an overall simplified structure the L-N is a compact package of power.

Fast, effortless starts from a one-pull recoil starter
A short and smooth pull of the toggle kicks off the engine, as simple as a gasoline model. It is made easy by a special auto-return decompressor and Yanmar's own efficient combustion system. Electric starting is also a useful option.

Downloads: Literature

 
ModelL48NL70NL100N
Type
4 stroke, vertical cylinder, air cooled diesel engine
No. of Cylinders
1
Bore x Stroke 70 x 57mm 78 x 67mm 86 x 75mm
Displacement 0.219L 0.320L 0.435L
Continuous Rated Output - Engine Speed 3600rpm 3000rpm 3600rpm 3000rpm 3600rpm 3000rpm
Continuous Rated Output - Output 3.1kW 2.8kW 4.4kW 4.1kW 6.6kW 5.7kW
Maximum Rated Output - Engine Speed 3600rpm 3000rpm 3600rpm 3000rpm 3600rpm 3000rpm
Maximum Rated Output - Output / Engine Speed 3.5kW 3.1kW 4.9kW 4.5kW 7.4kW 6.5kW
High Idling 3800±30rpm 3175±30rpm 3800±30rpm 3175±30rpm 3800±30rpm 3175±30rpm
Engine Weight (dry) - Electric Starter 32.0kg 41.0kg 53.5kg
Engine Weight (dry) - Recoil Start 27.0kg 36.0kg 48.5kg
Cooling System
Forced air by flywheel fan
Lubricating System
Forced lubrication with trochoid pump
Starting System
Electric start / recoil start
Dimension - Overall Length (L) 332mm 378mm 412mm
Dimension - Overall Width (W) 384mm 422mm 471mm
Dimension - Overall Height (H) 417mm 453mm 494mm
Lubricating System - Dipstick Upper Limit 0.80L 1.05L 1.6L
Lubricating System - Dipstick Lower Limit 0.55L 0.65L 1.0L
Fuel oil tank capacity 2.4L 3.3L 5.4L

Accessories S - Standard, O - Optional
ModelL48NL70NL100N
  General Generator Pump General Generator Pump General Generator Pump
Fuel System - Fuel tank (2.4L) S S S            
Fuel System - Fuel tank (3.3L)       S S S      
Fuel System - Fuel tank (5.4L)             S S S
Fuel System - w/o Fuel tank O O O O O O O O O
Starting system - Starting motor
(w/Recoil starter)
S S S S S S S S S
Starting system - Recoil starter O O O O O O O O O
Starting system - Key switch S S S S S S S S S
Starting system - w/o Key switch O O O O O O O O O
Electric system - Charging dynamo
(12V-15A)
S S S S S S S S S
Electric system - Charging dynamo
(12V-1A)
O O O O O O O O O
Electric system - w/o Charging dynamo O O O O O O O O O
PTO system - Straight (E-D) S     S     S    
PTO system - Straight (D) O     O     O    
PTO system - Taper (E-DG)   S     S     S  
PTO system - Taper (DG)   O     O     O  
PTO system - Taper (E-DI)   O     O     O  
PTO system - Thread (E-DP)     S     S     S
PTO system - Thread (DP)     O     O      
Speed control device -
General use (by remote & hand)
S O O S O O S O O
Speed control device -
Constant speed type (by hand)
O S O O S O O S O
Speed control device -
Friction plate type (by hand)
O O S O O S O O S
Maintenance tools S S S S S S S S S