Power Range
1800-2400 bhp (1342-1790 bkW)
Speed Range
2300 rpm
Emissions
IMO II, U.S. EPA Tier 3 (recreational), RCD, China II
Overview
With the introduction of the C32B product line in 2021, Caterpillar Marine now confirms the availability of the uprated Cat® C32B Marine Propulsion engine in 2025 mhp and 2433 mhp offerings. With 25% more peak power and high performance, this engine demonstrates great performance and efficiency, while also delivering noise reduction at lower engine speeds. This product meets IMO II and U.S. EPA Tier 3 (recreational) emissions standards and is perfectly suited for yachting applications. Governmental applications can also be a great fit for D-tier ratings. Please consult with your Cat Marine dealer regarding the use of E-tier ratings.
Key Features and Benefits:
PRODUCT SPECIFICATIONS FOR C32B
RATINGS
|
Power Range |
1800-2400 bhp (1342-1790 bkW) |
ENGINE
|
Speed Range |
2300 rpm |
|
Emissions |
IMO II, U.S. EPA Tier 3 (recreational), RCD, China II |
|
Aspiration |
Sequential Turbocharged – aftercooled |
|
Bore |
5.71 in |
|
Stroke |
6.38 in |
|
Displacement |
1959 in³ |
|
Rotation from Flywheel End |
Counterclockwise |
|
Configuration |
VEE 12, 4-Stroke Cycle diesel |
|
Flywheel Housing |
SAE No. O |
|
Cooling |
SWAC (Seawater Aftercooler) |
|
Governor |
Electronic (ADEM VI) |
|
Oil Change Interval |
250 hrs |
|
Refill Capacity |
Lube Oil System w/ oil filter change: 76 L (20 gal) |
DIMENSIONS & WEIGHTS
|
Dry Weight |
7736 lb |
|
Length |
87.8 in |
|
Width |
58 in |
|
Height |
58.1 in |
C32B STANDARD EQUIPMENT
STANDARD EQUIPMENT
C32B OPTIONAL EQUIPMENT
OPTIONAL ATTACHEMENTS
Power Range
400 bhp - 500 bhp (298 bkW - 373 bkW)
Speed Range
2900 rpm
Emissions
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.
Key Features & Benefits
PRODUCT SPECIFICATIONS FOR C7.1
RATINGS
|
Power Range |
400 bhp - 500 bhp (298 bkW - 373 bkW) |
ENGINE SPECIFICATIONS
|
Speed Range |
2900 rpm |
|
Emissions |
IMO II, U.S. EPA Tier 3, RCD II, China II |
|
Rotation from Flywheel End |
Counterclockwise |
|
Bore |
4.13 in |
|
Stroke |
5.31 in |
|
Aspiration |
Turbocharged, aftercooled |
|
Displacement |
428 in³ |
|
Configuration |
In-line 6, 4-Stroke-Cycle Diesel |
DIMENSIONS & WEIGHTS
|
Width – Engine |
31.4 in |
|
Height |
34.5 in |
|
Engine Dry Weight – Approximate |
1676 lb |
|
Length – Engine |
43.1 in |
C7.1 STANDARD EQUIPMENT
STANDARD EQUIPMENT
C7.1 OPTIONAL EQUIPMENT
OPTIONAL ATTACHEMENTS
Power Range
578-609 mhp (570-600 bhp)
Speed Range
2300 rpm
Emissions
IMO I
Overview
Cat® C12 Diesel Marine Propulsion Engines, with ratings of 578-609 mhp (570-600 bhp) at 2300 rpm, meet IMO I emission standards. The C12 takes full advantage of the electronically controlled unit injection fuel system, resulting in an environmentally friendly engine with outstanding performance and fuel economy. There is also a wide range of optional equipment available to meet the needs of your marine commercial or pleasure craft application.
Key Features
PRODUCT SPECIFICATIONS FOR C12
RATINGS
|
Power Range |
578-609 mhp (570-600 bhp) |
ENGINE
|
Speed Range |
2300 rpm |
|
Emissions |
IMO I |
|
Aspiration |
TA |
|
Bore |
5.1 in |
|
Stroke |
5.9 in |
|
Displacement |
732 in³ |
|
Rotation from Flywheel End |
Counterclockwise |
|
Configuration |
In-line 6, 4-Stroke-Cycle Diesel |
DIMENSIONS & WEIGHTS
|
Height |
39.5 in |
|
Length |
62 in |
|
Width |
38.1 in |
|
Dry Weight |
2588 lb |
C12 STANDARD EQUIPMENT
AIR INLET SYSTEM
CONTROL SYSTEM
COOLING SYSTEM
EXHAUST SYSTEM
FLYWHEELS & FLYWHEEL HOUSINGS
FUEL SYSTEM
INSTRUMENTATION
LUBE SYSTEM
MOUNTING SYSTEM
POWER TAKE-OFFS
PROTECTION SYSTEM
GENERAL
C12 OPTIONAL EQUIPMENT
AIR INLET SYSTEM
CHARGING SYSTEM
COOLING SYSTEM
EXHAUST SYSTEM
FUEL SYSTEM
INSTRUMENTATION
LUBE SYSTEM
MOUNTING SYSTEM
POWER TAKE-OFFS
STARTING SYSTEM
GENERAL
PACKING
Power Range
660-705 bhp (492-526 bkW)
Speed Range
2300 rpm
Emissions
IMO II
Overview
Cat® C12 ACERT Diesel Marine Propulsion Engines, with ratings of 669-715 mhp (660-705 bhp) at 2300 rpm, meet IMO II emission standards. The C12 takes full advantage of the electronically controlled unit injection fuel system, resulting in an environmentally friendly engine with outstanding performance and fuel economy. There is also a wide range of optional equipment available to meet the needs of your specific pleasure craft application.
Key Features
PRODUCT SPECIFICATIONS FOR C12 ACERT
RATINGS
|
Power Range |
660-705 bhp (492-526 bkW) |
ENGINE
|
Speed Range |
2300 rpm |
|
Emissions |
IMO II |
|
Aspiration |
TA |
|
Bore |
5.1 in |
|
Stroke |
5.9 in |
|
Displacement |
732 in³ |
|
Rotation from Flywheel End |
Counterclockwise |
|
Configuration |
In-line 6, 4-Stroke-Cycle Diesel |
DIMENSIONS & WEIGHTS
|
Width |
38.1 in |
|
Dry Weight |
2588 lb |
|
Length |
62 in |
|
Height |
39.5 in |
C12 ACERT STANDARD EQUIPMENT
AIR INLET SYSTEM
CONTROL SYSTEM
COOLING SYSTEM
EXHAUST SYSTEM
FLYWHEELS & FLYWHEEL HOUSINGS
FUEL SYSTEM
LUBE SYSTEM
MOUNTING SYSTEM
POWER TAKE-OFFS
PROTECTION SYSTEM
GENERAL
C12 ACERT OPTIONAL EQUIPMENT
AIR INLET SYSTEM
CHARGING SYSTEM
COOLING SYSTEM
EXHAUST SYSTEM
FUEL SYSTEM
INSTRUMENTATION
LUBE SYSTEM
MOUNTING SYSTEM
POWER TAKE-OFFS
STARTING SYSTEM
GENERAL
PACKING
Power Range
814-1015 mhp, 803-1001 bhp, 599-747 bkW
Speed Range
2100-2300 rpm
Emissions
EPA Tier 3, IMO II, EU Stage IIIA
Overview
The C18 ACERT marine propulsion engine has high performance commercial application ratings of 814-1015 mhp (803-1001 bhp) at 2100-2300 rpm that meet U.S. EPA Tier 3, IMO II, and EU Stage IIIA emissions regulations. In addition to meeting the stricter EPA Tier 3 emissions, this engine now offers a fresh water aftercooled option for the commercial propulsion and auxiliary engines and genset packages. From fishing to offshore and everything in between, you can be confident that we have the solution to fit your needs.
Key Features
PRODUCT SPECIFICATIONS FOR C18 ACERT TIER 3
RATINGS
|
Power Range |
814-1015 mhp, 803-1001 bhp, 599-747 bkW |
ENGINE
|
Speed Range |
2100-2300 rpm |
|
Emissions |
EPA Tier 3, IMO II, EU Stage IIIA |
|
Aspiration |
TA,TTA |
|
Bore |
5.7 in |
|
Stroke |
7.2 in |
|
Displacement |
1106 in³ |
|
Rotation from Flywheel End |
Counterclockwise |
|
Configuration |
In-line 6, 4-Stroke-Cycle Diesel |
DIMENSIONS & WEIGHTS
|
Maximum Length |
76 in |
|
Minimum Length |
73 in |
|
Maximum Dry Weight |
4299 lb |
|
Minimum Dry Weight |
4000 lb |
|
Maximum Height |
51.2 in |
|
Minimum Height |
47.2 in |
|
Maximum Width |
47.4 in |
|
Minimum Width |
44.6 in |
C18 ACERT TIER 3 STANDARD EQUIPMENT
AIR INLET SYSTEM
COOLING SYSTEM
EXHAUST SYSTEM
FLYWHEELS & FLYWHEEL HOUSINGS
FUEL SYSTEM
LUBE SYSTEM
POWER TAKE-OFFS
GENERAL
CONTROL SYSTEM
C18 ACERT TIER 3 OPTIONAL EQUIPMENT
EXHAUST SYSTEM
CHARGING SYSTEM
CONTROL SYSTEM
COOLING SYSTEM
FUEL SYSTEM
INSTRUMENTATION
LUBE SYSTEM
MOUNTING SYSTEM
POWER TAKE-OFFS
PROTECTION SYSTEM
STARTING SYSTEM
Power Range
1015-1150 mhp, 1001-1136 bhp, 747-847 bkW
Speed Range
2300 rpm
Emissions
EPA Tier 3, IMO II, EU IW
Overview
The C18 ACERT marine propulsion engine has ratings for recreational applications that meet U.S. EPA Tier 3, IMO II, and EU Stage IIIA Regulations. This marine engine incorporates the latest core engine system innovations to provide maximum benefits in power density, performance, emissions, and fuel efficiency. Not only is it equipped with engine monitoring and protection features, it is also compatible with Cat display and vessel control systems. With this engine comes the unmatched worldwide marine support network including Cat dealers and hundreds of authorized marine dealers. Their combined experience and expertise, products and services, backup and support allow your recreational pleasure craft to remain precisely that — a pleasure.
KEY FEATURES
PRODUCT SPECIFICATIONS FOR C18 ACERT TIER 3 RECREATIONAL
RATINGS
|
Power Range |
1015-1150 mhp, 1001-1136 bhp, 747-847 bkW |
ENGINE
|
Speed Range |
2300 rpm |
|
Emissions |
EPA Tier 3, IMO II, EU IW |
|
Aspiration |
TA,TTA |
|
Bore |
5.7 in |
|
Stroke |
7.2 in |
|
Displacement |
1106 in³ |
|
Rotation from Flywheel End |
Counterclockwise |
|
Configuration |
In-line 6, 4-Stroke-Cycle Diesel |
DIMENSIONS & WEIGHTS
|
Maximum Height |
51.2 in |
|
Minimum Height |
47.2 in |
|
Maximum Length |
76 in |
|
Minimum Length |
73 in |
|
Maximum Width |
47.4 in |
|
Minimum Width |
44.6 in |
|
Maximum Dry Weight |
4299 lb |
|
Minimum Dry Weight |
4000 lb |
C18 ACERT TIER 3 RECREATIONAL STANDARD EQUIPMENT
AIR INLET SYSTEM
CONTROL SYSTEM
COOLING SYSTEM
EXHAUST SYSTEM
FLYWHEELS & FLYWHEEL HOUSINGS
FUEL SYSTEM
LUBE SYSTEM
POWER TAKE-OFFS
PROTECTION SYSTEM
GENERAL
C18 ACERT TIER 3 RECREATIONAL OPTIONAL EQUIPMENT
CHARGING SYSTEM
FUEL SYSTEM
LUBE SYSTEM
POWER TAKE-OFFS
STARTING SYSTEM
CONTROL SYSTEM
INSTRUMENTATION
Power Range
2000 bhp (1491 bkW)
Speed Range
2300 rpm
Emissions
IMO II, U.S. EPA Tier 3 Recreational, RCD, China Stage II
Overview
C32B Tier 3 Recreational
All new from the block up and built on the proven C32 platform, the C32B marine engine delivers more power, more speed, more time on the water and more peace of mind. All that comes in a quieter package with only a 2% increase in weight compared to the previous model — making the C32B the right choice for new builds and repowers. Rated at 2025 mhp (2000 bhp) / 1491 bkW @ 2300 rpm, the C32B meets U.S. EPA Marine Tier 3 and IMO II emissions standards. With an E Tier rating, it can run at the full 2000hp up to 8% of the time.
Key Features and Benefits:
PRODUCT SPECIFICATIONS FOR C32B
RATINGS
|
Power Range |
2000 bhp (1491 bkW) |
ENGINE
|
Speed Range |
2300 rpm |
|
Emissions |
IMO II, U.S. EPA Tier 3 Recreational, RCD, China Stage II |
|
Aspiration |
TTA |
|
Bore |
5.71 in |
|
Stroke |
6.38 in |
|
Displacement |
1959 in³ |
|
Rotation from Flywheel End |
Counterclockwise |
|
Configuration |
Vee 12, 4-Stroke-Cycle Diesel |
DIMENSIONS & WEIGHTS
|
Width |
57.8 in |
|
Length |
82.9 in |
|
Height |
56.9 in |
|
Dry Weight |
9934 lb |
ENGINE SPECIFICATIONS
|
Stroke |
6.38 in |
C32B STANDARD EQUIPMENT
STANDARD EQUIPMENT
C32B OPTIONAL EQUIPMENT
OPTIONAL ATTACHMENTS
Power Range
1600-1900 bhp (1193-1417 bkW)
Speed Range
2300 rpm
Emissions
IMO II, U.S. EPA Tier 3 Recreational, RCD, China Stage II
Overview
C32 propulsion engine ratings of 1925 mhp (1900 bhp) 1417 bkW, 1825 mhp (1800 bhp) 1342 bkW, and 1622 mhp (1600 bhp) 1193 bkW are available with heat exchanger cooling. These ratings are compliant for U.S. EPA Tier 3 Recreational, EU Stage IIIA, and IMO II. The 1600 and 1800 bhp ratings are also meet US EPA Tier 3 Commercial Standards. The engine configuration includes an air cleaner and CCV system as well as jacket water aftercooling. Additional features include a “plug-in PTO”, an MECP I control panel, and hybrid fuel lines. The MECP I panel has a monochrome display for engine parameters, external outputs for customer installed visible and audible alarms, Start/Stop buttons, and an Off/Local/Remote switch.
Key Features & Benefits
PRODUCT SPECIFICATIONS FOR C32
RATINGS
|
Power Range |
1600-1900 bhp (1193-1417 bkW) |
ENGINE
|
Speed Range |
2300 rpm |
|
Emissions |
IMO II, U.S. EPA Tier 3 Recreational, RCD, China Stage II |
|
Aspiration |
Twin Turbocharged-aftercooled |
|
Bore |
5.71 in |
|
Stroke |
6.38 in |
|
Displacement |
1959 in³ |
|
Rotation from Flywheel End |
Counterclockwise |
|
Configuration |
Vee 12, 4-Stroke Cycle diesel |
DIMENSIONS & WEIGHTS
|
Length |
82.9 in |
|
Width |
58.3 in |
|
Height |
56.9 in |
|
Dry Weight |
6780 lb |
C32 STANDARD EQUIPMENT
STANDARD EQUIPMENT
C32 OPTIONAL EQUIPMENT
OPTIONAL ATTACHMENTS
Power Range
1340-2366 bhp (1000-1765 bkW)
Speed Range
1600-1800 rpm
Emissions
EPA Tier 3, IMO II
Overview
The Cat 3512C marine propulsion engine makes your investment work harder. Through a wide range of available power ratings, no required aftertreatment technology, and nominal rated BSFC fuel consumption - it will drive down your total cost of ownership. With a redesigned piston bowl shape to improve combustion, and improved fuel delivery, this engine is IMO II emissions compliant and committed to sustainable environmental development. Single-source support, the Caterpillar warranty, and industry-leading one-year warranty on parts make the 3512C a fully integrated marine power solution
Key Features
Making Your Investment Work Harder: Uses advanced predictive modeling software to select best nozzle configurations and combustion cylinder geometry, Stainless steel exhaust manifold and turbo heat shields, Closed crankcase ventilation system, Dual camshafts, Reduced aftercooler heat load for smaller heat exchanger requirements
Driving down Total Cost of Ownership: A wide range of power ratings available, No aftertreatment technology required, Fuel consumption nominal rated BSFC
Committed to Sustainable Development: Modified piston bowl shape to improve combustion and reduce emissions, Uses K-factor injector to align with predictive model analysis, Better electronic injection control using crank timing vs. cam timing, EPA Marine Tier 3/IMO Tier II Emissions Compliant, Lower IMAT = Lower NOx
Improving Workforce Efficiency: Electronic governing (A4 ECU), Instrument panel shipped loose with Color Marine Power Display (MPD), Cold mode start strategy, Programmable low idle, Optional marine alarm and protection system
Fully Integrated Marine Power Solution: Single-source support, Caterpillar warranty for all factory packaged components, Industry-leading one-year warranty on parts
PRODUCT SPECIFICATIONS FOR 3512C HD
RATINGS
|
Power Range |
1340-2366 bhp (1000-1765 bkW) |
ENGINE
|
Speed Range |
1600-1800 rpm |
|
Emissions |
EPA Tier 3, IMO II |
|
Aspiration |
TTA |
|
Bore |
6.69 in |
|
Stroke |
8.5 in |
|
Displacement |
3574 in³ |
|
Rotation from Flywheel End |
Counterclockwise |
|
Configuration |
Vee 12, 4-Stroke-Cycle Diesel |
DIMENSIONS & WEIGHTS
|
Width |
80.2 in |
|
Height |
87.5 in |
|
Dry Weight |
16508 lb |
|
Length |
104.2 in |
3512C HD STANDARD EQUIPMENT
AIR INLET SYSTEM
CONTROL SYSTEM
EXHAUST SYSTEM
FUEL SYSTEM
LUBE SYSTEM
POWER TAKEOFFS
PROTECTION SYSTEM
GENERAL
FLYWHEEL AND FLYWHEEL HOUSING
COOLING SYSTEM
INSTRUMENTATION
3512C HD OPTIONAL EQUIPMENT
AIR INLET SYSTEM
CHARGING SYSTEM
CONTROL SYSTEM
COOLING SYSTEM
EXHAUST SYSTEM
FUEL SYSTEM
INSTRUMENTATION
LUBE SYSTEM
POWER TAKE-OFFS
MARINE SOCIETY REQUIREMENTS
PROTECTION SYSTEM
SPECIAL APPEARANCE PACKAGES
STARTING SYSTEM
MOUNTING SYSTEM
PACKING

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