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YUCHAI YC6TD Series Marine Diesel Engine

    Built on German, US & Japanese technology with electronic control — the YC6TD delivers 435–700 PS for main propulsion and 355–400 kW marine gensets.

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    20,000 Hour Durability Rigorous validation, alloy cast iron block, forged steel crankshaft, one cylinder one head design.
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    10–15% Fuel Savings Four-valve tech, electronic control pump, Holset turbocharger, 15%+ less mechanical loss.
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    Quiet Operation Four-valve reduces intake/exhaust noise, rear gear chamber, point-line gear meshing for lower transmission noise.
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    Easy Maintenance One cylinder one cover structure, evenly spaced head bolts, high-placed camshaft, roller tappet.
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    High Power Range 435–700 PS at 1800 r/min, ideal for various vessel types and 355–400 kW gensets.
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    ZC, CCS & IMO Certified Meets international marine classification standards, electric/gas start options.
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Product Description

The YC6TD series marine diesel engine, developed by Yuchai, integrates advanced technologies from Germany, the USA, and Japan, featuring an efficient electronic control strategy tailored for marine applications. With a power range of 435-700 horsepower, it is the ideal power solution for various vessels and 355-400kW auxiliary generator sets. The engine is built with rigorous mechanical development standards, undergoing 20,000 hours of durability testing. Its alloy cast iron block and forged steel crankshaft ensure high strength and durability, while the four-valve technology and turbocharged intercooling system enhance fuel efficiency, reducing consumption by 10-15% compared to engines of the same power.

YC6TD Technical Data

Model YC6TD700L-C20 YC6TD650L-C20 YC6TD605L-C20
Type Vertical, In-line, Direct injection, Water-cooled, 4-Stroke
Intake way Turbocharged & Inter-cooled
No. of cylinders-Bore × Stroke (mm) 6-152 × 180
Displacement (L) 19.59
Compression ratio 14:1
Continuous power/speed (kW(Ps)/r/min) 515 (700) /1800 478 (650) /1800 445 (605) /1800
One-hour power/speed (kW(Ps)/r/min) 566.5 (770) /1858 526 (715) /1858 489.5 (665) /1858
Min. specific fuel consumption (g/kW·h) ≤195
Specific oil consumption (g/kW·h) ≤0.5
Engine oil capacity (L) 52
The Min. steady operation speed (r/min) ≤810
Crankshaft rotation direction (see from power output end) Anticlockwise
Starting way Electrical (Gas start is optional)
Net weight (kg) 2200
Overall dimensions (L×W×H) (mm) 2108 × 1125 × 1415
Matched reduction gearbox 400 etc.
Certificate ZC, CCS, IMO

YC6TD Technical Data

Model YC6TD655L-C20 YC6TD600L-C20
Type Vertical, In-line, Direct injection, Water-cooled, 4-Stroke
Intake way Turbocharged & Inter-cooled
No. of cylinders-Bore × Stroke (mm) 6-152 × 180
Displacement (L) 19.59
Compression ratio 14:1
Continuous power/speed (kW(Ps)/r/min) 480 (655) /1500 441 (600) /1500
One-hour power/speed (kW(Ps)/r/min) 528 (720) /1500 485 (660) /1500
Min. specific fuel consumption (g/kW·h) ≤195
Specific oil consumption (g/kW·h) ≤0.5
Engine oil capacity (L) 52
The Min. steady operation speed (r/min) /
Crankshaft rotation direction (see from power output end) Anticlockwise
Starting way Electrical (Gas start is optional)
Net weight (kg) 2200
Overall dimensions (L×W×H) (mm) 2108 × 1125 × 1415
Adapted for marine gen-set (kW) 400 355
Certificate ZC, CCS, IMO

YC6TD Installation Drawing

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