G-Series Details

Sdec G-Series marine engine — OBKA Group

G-Series Marine Disel Engine

  • 1. Enhanced structural design: Through FEA model analysis and bonding strength calculations, improvements such as reinforced body design and integrated cylinder head installation have been achieved.
  • 2. High durability: Forged and tempered steel crankshaft without quenching increases fatigue resistance and service life.
  • 3. Optimized combustion system: After CFD analysis, a high-flow cooling pump, fuel pump, and high-efficiency turbocharger were added, achieving a minimum fuel consumption of 195 g/kW·h and maximum torque reserve of 2300 N·m.
  • 4. Improved auxiliary components: Flanged fuel injection pump, new fuel-gas separator, optimized thermostat and fuel pipeline, integrated heat exchanger with expansion tank, and advanced sealing gaskets enhance quality and appearance.
  • 5. Reliability & maintenance: Features include a fracture-split connecting rod and efficient water–air intercooler. High compatibility of spare parts with previous generation reduces operating cost and simplifies maintenance.

Technical Specifications

Model G128 / SC15G
Type Inline, Water-Cooled, 4-Stroke, Wet Cylinder Liner
Bore × Stroke (mm) 135 × 150 / 135 × 165
Minimum Fuel Consumption
(g/kW·h)
195
Starting Method Electric Start
Firing Order 1-5-3-6-2-4
Noise Level ≤108 dB (A)
Crankshaft Rotation (facing flywheel) Counterclockwise
Number of Cylinders 6
Displacement (L) 12.8 / 14.2
Oil Consumption
(g/kW·h)
0.5
Certificates CCS / IMO II
Flywheel & Housing SAE 1# & 14#
Overhaul Interval 20,000 hours
Dimensions (L × W × H) (mm) 1680 × 884 × 1496
Net Weight (kg) 1350

Technical Parameters

Model Type Displacement (L) Rated Power (kW) Rated Power (HP) Speed (rpm) Aspiration Fuel Control System Interface Output Weight (kg) Certificates Emission
G128ZLCa 6 Cylinder / Inline 12.8 180 244 1500 TA Mechanical SAE 1# / 14' 1315 CCS IMO TIER II
G128ZLCa3 6 Cylinder / Inline 12.8 180 244 1800 TA Mechanical 1315 CCS IMO TIER II
G128ZLCa1 6 Cylinder / Inline 12.8 193 263 1500 TA Mechanical 1315 CCS IMO TIER II
G128ZLCa2 6 Cylinder / Inline 12.8 236 320 1500 TA Mechanical 1315 CCS IMO TIER II
G128ZLCa12 6 Cylinder / Inline 12.8 227 308 1800 TA Mechanical 1315 CCS IMO TIER II
G128ZLCa5 6 Cylinder / Inline 12.8 254.9 346 1500 TA Mechanical 1315 CCS IMO TIER II
G128ZLCa15 6 Cylinder / Inline 12.8 254.9 346 1800 TA Mechanical 1315 CCS IMO TIER II
SC15G420CA2 6 Cylinder / Inline 14.2 272 370 1500 TA Mechanical 1350 CCS IMO TIER II
SC15G460CA2 6 Cylinder / Inline 14.2 300 408 1500 TA Mechanical 1350 CCS IMO TIER II
SC15G500CA2 6 Cylinder / Inline 14.2 320 435 1500 TA Mechanical 1350 CCS IMO TIER II
SC15G500.1CA2 6 Cylinder / Inline 14.2 320 435 1800 TA Mechanical 1350 CCS IMO TIER II
SC15G500.18CA1 6 Cylinder / Inline 14.2 361 490 1800 TA EUP 1350 CCS IMO TIER II
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