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YUCHAI YC4D Series Marine Diesel Engines

    YuChai YC4D Series marine diesel engines (45–120PS) developed with German technology, delivering compact, reliable power for small vessels and fishing boats.

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    German-Technology Engine Design Developed with German marine technology using high-strength alloy cylinder block and head for superior rigidity.
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    Low Fuel & Oil Consumption High-performance combustion chamber with intake swirl keeps fuel consumption ≤200g/kWh and oil consumption ≤0.5g/kWh.
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    10,000+ Hour Overhaul Interval Integral crankshaft and sliding bearing design ensures lightweight, compact build with over 10,000 hours between overhauls.
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    ZC & CCS Certified Certified by ZC and CCS, compatible with H35, MB142, MB170 and other marine gearboxes.
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Product Description

The YUCHAI YC4D Series Marine Diesel Engines (45-120HP) are engineered with German technology, featuring high-strength alloy cylinder blocks, water-cooled 4-stroke designs, and advanced combustion chambers for superior fuel efficiency. With overhaul periods exceeding 10,000 hours, these engines reduce maintenance costs significantly. Ideal for small fishing boats, cargo vessels, and generator sets (24-50kW), they deliver reliable power with low lubricant consumption (≤0.5g/kWh) and ultra-low fuel usage (≤200g/kWh). Certified by CCS and ZC, they ensure compliance with global marine standards.

YC4DTechnical Data

Model YC4108CA YC4108C YC4D55C YC4D80-C20
Type Vertical, In-line, Water-cooled, 4-Stroke
Intake way Natural aspirated
No. of Cylinders-Bore × Stroke (mm) 4-108 × 115
Displacement (L) 4.214
Compression ratio 17:1
Continuous power/speed (kW(Ps)/r/min) 32 (45) /1500 40 (55) /1500 40 (55) /1800 58 (80) /2400
One-hour power/speed (kW(Ps)/r/min) 35.2 (50) /1548 44 (60) /1548 44 (60) /1858 63.8 (85) /2478
Min. specific fuel consumption (g/kW·h) ≤200
Specific oil consumption (g/kW·h) ≤0.5
Engine oil capacity (L) 11-13
The Min. steady operation speed (r/min) ≤675 ≤810 ≤1080
Crankshaft rotation direction (see from power output end) Anticlockwise
Starting way Electrical
Net weight (kg) 370
Overall dimensions (L×W×H) (mm) 986 × 730 × 948
Matched reduction gearbox H35, MB142, 40A, MB170, MB5170, etc.
Certificate ZC, CCS /

YC4D Technical Data

Model YC4108ZC YC4D75C YC4D100Z-C20 YC4D120Z-C20
Type Vertical, In-line, Water-cooled, 4-Stroke
Intake way Turbocharged
No. of Cylinders-Bore × Stroke (mm) 4-108 × 115
Displacement (L) 4.214
Compression ratio 17:1
Continuous power/speed (kW(Ps)/r/min) 50 (70) /1500 55 (75) /1800 75 (100) /2400 90 (120) /3000
One-hour power/speed (kW(Ps)/r/min) 55 (75) /1548 60.5 (80) /1858 82.5 (110) /2478 99 (135) /3096
Min. specific fuel consumption (g/kW·h) ≤198
Specific oil consumption (g/kW·h) ≤0.5
Engine oil capacity (L) 11-13
The Min. steady operation speed (r/min) ≤675 ≤810 ≤1080 ≤1350
Crankshaft rotation direction (see from power output end) Anticlockwise
Starting way Electrical
Net weight (kg) 390
Overall dimensions (L×W×H) (mm) 1131 × 746 × 962
Matched reduction gearbox HC65, MB170, MB5170, etc. HC35, MB170, MB5170, etc.
Certificate ZC, CCS /

YC4D Technical Data

Model YC4108C YC4108ZC YC4D80L-C20
Type Vertical, In-line, Water-cooled, 4-Stroke
Intake way Natural aspirated Turbocharged Turbocharged & Inter-cooled
No. of Cylinders-Bore × Stroke (mm) 4-108 × 115
Displacement (L) 4.214
Compression ratio 17:1 17.4:1
Continuous power/speed (kW(Ps)/r/min) 40 (55) /1500 50 (70) /1500 60 (80) /1500
One-hour power/speed (kW(Ps)/r/min) 44 (60) /1500 55 (75) /1500 66 (90) /1500
Min. specific fuel consumption (g/kW·h) ≤200
Specific oil consumption (g/kW·h) ≤0.5
Engine oil capacity (L) 11-13 16
The Min. steady operation speed (r/min) /
Crankshaft rotation direction (see from power output end) Anticlockwise
Starting way Electrical
Net weight (kg) 370 390 490
Overall dimensions (L×W×H) (mm) 986 × 730 × 948 1131 × 746 × 962 1030 × 695 × 825
Adapted for marine gen-set (kW) 24/32 35/40 50
Certificate ZC, CCS

YC4D Installation Drawing

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