CAT 3406 Marine Diesel Engine – 300 to 550 HP, 14.6L, Turbocharged

The CAT 3406 Marine Diesel Engine, manufactured by Caterpillar Inc. in Peoria, Illinois, USA, is a dependable and high-performance propulsion engine widely used in marine vessels. This inline 6-cylinder, 4-stroke diesel engine features a displacement of 14.6 liters (893 cubic inches), and delivers power outputs ranging between 300 to 550 horsepower depending on the specific marine rating. It is equipped with a turbocharged and seawater-aftercooled system, ensuring optimal combustion and performance even under continuous heavy-duty conditions. The engine uses either mechanical or electronic fuel injection systems, based on its configuration, and incorporates a closed-circuit jacket water cooling system with seawater heat exchanger. With a dry weight of approximately 1,370–1,600 kg and compact overall dimensions, the CAT 3406 is a proven choice for fishing vessels, patrol boats, ferries, and auxiliary marine drives requiring reliability and longevity.

Specifications:

– Engine Model: Likely CAT 3406
– Manufacturer: Caterpillar Inc., Peoria, Illinois, USA
– Brand: CAT® Marine Power
– Engine Type: 4-stroke, inline 6-cylinder diesel
– Fuel Type: Diesel
– Aspiration: Turbocharged and aftercooled
– Power Output: 300–550 HP (varies with marine rating)
– Displacement: 14.6 liters (893 in³)
– Bore x Stroke: 137 mm × 165 mm
– Cooling System: Jacket-water cooled with seawater heat exchanger
– Injection System: Mechanically governed or electronically controlled
– Weight (Dry): Approx. 1,370–1,600 kg
– Dimensions (Approx.):
  • Length: ~1,700 mm
  • Width: ~900 mm
  • Height: ~1,200 mm
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