3TNM74-AFF Yanmar 3-cylinder diesel engine for construction machinery
| State |
Brand New |
| Type |
In-line three-cylinder water-cooled diesel engine |
| Displacement |
Approximately 0.95 L |
| Bore × Stroke |
74 × 73 mm |
| Power |
17.8 kW |
| Fuel System |
Mechanical fuel injection |
| Intake Method |
Naturally aspirated |
| Starting Method |
Electric start |
| Application |
Small generator sets, small construction equipment, industrial auxiliary power equipment, mobile work equipment |
The Yanmar 3TNM74-AFF diesel engine belongs to the Yanmar TNM series of three-cylinder water-cooled diesel engines, primarily designed for small equipment and light-duty power requirements. This model focuses on compact structure, reliable operation, and good fuel economy, making it suitable for equipment platforms with limited space and moderate power demands.
The engine operates smoothly, requires low maintenance, and is suitable for long-term stable operation. It has a mature application history in small construction equipment and industrial auxiliary power fields, making it a practical small-power diesel engine.
Features and Advantages
• Compact and lightweight structure: Three-cylinder in-line design, small footprint, easy for equipment integration
• Stable and reliable operation: Mature TNM platform, suitable for long-term continuous operation
• Smooth power output: Naturally aspirated structure, linear power response, easy to control
• Good fuel economy: Stable mechanical fuel injection system, balanced fuel consumption performance
• Reliable heat dissipation control: Water-cooled cooling method, effectively maintains stable operating temperature
• Convenient maintenance: Simple system structure, low daily maintenance and repair costs







Frequently Asked Questions
Q1: What is your main products?
A1: We are specialized in the excavator engine spare parts, for example Main cylinder block, cylinder head, crankshaft, Engine assembly, piston, cylinder liner, piston ring, camshaft, connecting rod, oil pump, water pump, valve series products, movement, etc. almost all parts of the entire engine.
Q2: If I only know the excavator model, but can not offer parts No., what should I do?
A2: If possible, you can send us pictures of old products, name plate or the size for reference.
Q3: Can you accept sample order?
A3: Yes sure. We can supply the sample if we have ready parts in stock, but the customers have to pay the sample cost and the courier cost.
Q4: Do you test all your goods before delivery?
A4: Yes, we have 100% test before delivery.
Q5: How can I do if there is something wrong with the items?
A5: Our products have been professionally tested and the quality is very stable. If you really found something wrong, please contacts. We have a professional after-sales team to help you solve the problem.