Ratings
| Power Range | 400 bhp - 500 bhp (298 bkW - 373 bkW) 400 bhp - 500 bhp (298 bkW - 373 bkW) |
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High Performance Propulsion and Maneuvering Solutions C7.1
Request A Price Find DealerKey Specs
- Power Range
- 400 bhp - 500 bhp (298 bkW - 373 bkW)
- 400 bhp - 500 bhp (298 bkW - 373 bkW)
- Speed Range
- 2900 rpm
- 2900 rpm
- Emissions
- IMO II, U.S. EPA Tier 3, RCD II, China II
- IMO II, U.S. EPA Tier 3, RCD II, China II
Overview
The C7.1 marine propulsion engine is ideal for recreational boating applications, specifically smaller vessels and motoryachts ranging from 25 -60 feet in size. The engine features a common rail fuel system enabling optimum combustion and low emissions. The engines provide noticeably quiet operation due to reduced combustion noise through advanced electronic control. Additionally, no visible smoke is emitted from the C7.1 engines during operation.
Features At A Glance
Key Features & Benefits
- Common rail fuel system enables optimum combustion and low emissions
- Reduced combustion noise through advanced electronic control
- 12V or 24V electrical system
- Compatible with Cat® displays and electronics
- Closed crankcase ventilation system improves engine room cleanliness
- Gear-driven jacket water pump and sea water pump for superior reliability
- Maintenance free valve train with hydraulic valve lash adjusters
- Self-priming fuel system ensures a smooth start every time
Product Specifications for C7.1
Engine Specifications
| Speed Range | 2900 rpm 2900 rpm |
| Emissions | IMO II, U.S. EPA Tier 3, RCD II, China II IMO II, U.S. EPA Tier 3, RCD II, China II |
| Rotation from Flywheel End | Counterclockwise Counterclockwise |
| Bore | 4.13 in 105 mm |
| Stroke | 5.31 in 135 mm |
| Aspiration | Turbocharged, aftercooled Turbocharged, aftercooled |
| Displacement | 428 in³ 7.01 l |
| Configuration | In-line 6, 4-Stroke-Cycle Diesel In-line 6, 4-Stroke-Cycle Diesel |
Dimensions & Weights
| Width - Engine | 31.4 in 798 mm |
| Height | 34.5 in 876 mm |
| Engine Dry Weight - Approximate | 1676 lb 760 kg |
| Length - Engine | 43.1 in 1095 mm |
C7.1 Standard Equipment
STANDARD EQUIPMENT
- Water cooled turbocharger and exhaust manifold
- Common rail fuel system
- Corrosion resistant sea water aftercooler
- Closed crankcase ventilation system
- Starter motors - 12V or 24V
- Fuel cooler
- Integral engine oil cooler
- Vibration damper and guard
- Electric fuel priming pump
- Self-tensioning multi-vee alternator drive belt
- Gear driven sea water pump (rubber impeller)
- Fin and tube type jacket water heat exchanger
- Front and rear engine mounting brackets
C7.1 Optional Equipment
OPTIONAL ATTACHEMENTS
- Alternators - 24V 140 amp - 12V 175 amp
- Transmission gear oil cooler (engine mounted)
- Instrument Panels
- Glow plugs
- Jacket water heater
- 6" water cooled exhaust elbow
- Isolation mounts
- Primary fuel filter/water separator (remote mount)
- Selection of factory-fitted marine transmissions and oil hoses
- Cabin heater (calorifier) connections
- Triple groove PTO pulley (crankshaft mounted)
- Flexible fuel hoses
- Right-hand and high level left hand oil dipsticks
See how C7.1 compares against frequently compared products.
Marine Power Systems
C7.1
Selected
- Power Range
- 400 bhp - 500 bhp (298 bkW - 373 bkW)
- 400 bhp - 500 bhp (298 bkW - 373 bkW)
- Speed Range
- 2900 rpm
- 2900 rpm
- Emissions
- IMO II, U.S. EPA Tier 3, RCD II, China II
- IMO II, U.S. EPA Tier 3, RCD II, China II
Marine Power Systems
C32B
- Power Range
- 1800-2400 bhp (1342-1790 bkW)
- 1800-2400 bhp (1342-1790 bkW)
- Speed Range
- 2300 rpm
- 2300 rpm
- Emissions
- IMO II, U.S. EPA Tier 3 (recreational), RCD, China II
- IMO II, U.S. EPA Tier 3 (recreational), RCD, China II
Marine Power Systems
C12
- Power Range
- 578-609 mhp (570-600 bhp)
- 578-609 mhp (570-600 bhp)
- Speed Range
- 2300 rpm
- 2300 rpm
- Emissions
- IMO I
- IMO I
Use the comparison tool to compare detailed specs of Cat and competitor models.
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Media Gallery
Photos
Videos
C7.1 High Performance Propulsion Engine
Meet the new C7.1 Commercial Propulsion Engine
C7.1 Marine Propulsion Engine Walkaround
