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Caterpillar C9.3-ME416 Marine Main Engine

Caterpillar C9.3-ME416 Marine Main Engine is a 4-cylinders in line, 9.3 liter four-strokes engine with 115 mm bore and 149 mm stroke. Equipped with Weifu A pump and RSV governor, engine comes with turbocharger. The prime power for generator set 2100 RPM of C9.3-ME416 Marine Main Engineis 310 bkW.
As part of EMAC, ConeMac provides industrial power pack solution that integrated with air intake, air exhaust, cooling system, control system, transmission and hydraulic accessories, We also supplying special products such as explosion proof engine, generator and water pump set, as well as ultra-low temperature condition engine power pack. We provide full life cycle services for all customers, from design to power system supply, from installation to commissioning, from after-sales service training to spare parts supply, from trouble shooting to overhaul technical support.

Advantages of Cat C9.3-ME416 Marine Main Engine

  • adapts to harsh working conditions, and has high-intensity and heavy-duty work capabilities.

  • The Holset wastegate valve makes the low speed performance more perfect and the power performance better.

  • Holset supercharger with integrated wastegate valve, low speed response and strong power.

  • Using forged steel camshaft and crankshaft, high-strength cylinder design, many parts are cast on the cylinder, with high rigidity, high pressure resistance, good reliability and longer service life.

  • The cylinder liner adopts a platform mesh honing design, which effectively prevents oil leakage with a perfect geometric structure, and adopts advanced technology such as new piston ring components and gasket crimping molding to reduce oil loss.

  • The cylinder block and cylinder head adopt integrated design to prevent the occurrence of engine water and oil leakage. The parts are 40 % less than other similar engines, and the failure rate is greatly reduced.

Technical Specifications

Basic Introduction of Caterpillar C9.3-ME416 Marine Main Engine

Engine Model:C9.3-ME416
Engine Type:I-6, 4-Stroke-Cycle-Diesel
Displacement:9.3 L
Rated Power / Speed:310 HP @ 2100 RPM
Aspiration Method:Turbocharged-Aftercooled
Emission Standard:IMO II
Bore * Stroke:115 mm (4.5 in) * 149 mm (5.8 in)
Packing Size(L * W * H):1470 mm * 1028 mm * 1060 mm
Weight , Net Dry:1045-1122 kg (2304-2474 lb)
Lead Time:15-30 Working Days
Payment Terms:T/T ,L/C

Engine Model

Rated Power



C9.3-ME375375 HP @ 1800 RPMB Rating – EM0780Turbocharged-Aftercooled
C9.3-ME416416 HP @ 2100 RPMC Rating – EM0779Turbocharged-Aftercooled
C9.3-ME476476 HP @ 2300 RPMD Rating – EM0778Turbocharged-Aftercooled

General Engine Specifications of CAT C9.3-ME416 Marine Main Engine

Basic Engine SpecificationsI-6, 4-Stroke-Cycle-DieselEmissionU.S. EPA Tier 3 / EU Stage IIIA / IMO II Certified
Displacement9.3 L (567.5 in³)Bore*Stroke115 mm (4.5 in)*149 mm (5.8 in)
Rated Engine Speed2100 RPMAspirationTurbocharged-Aftercooled
Fuel SystemCommon Rail Fuel SystemRotation (From Flywheel End)Counterclockwise
Lube Oil System24.5 L (6.5 gal) – SimplexCooling System41.3 L (11 gal) – HEX
Flywheel Housing/FlywheelSAE No. 1SAE No. 14 Flywheel113 Teeth
Length1470.8 mm (57.9 in)Width1028.6 mm (40.5 in)
Height1060.1 mm (41.7 in)Length (Front to Flywheel)1144.3 mm (45.1 in)
Weight, Dry (Approx)1045-1122 kg (2304-2474 lb)

Performance of C9.3-ME416 Marine Main Engine

Max PowerRPMBHPg/hrbkWg/bkW-hrProp DemandRPMBHPg/hrbkWg/bkW-hr

System of CAT C7.1E Industrial Diesel Engine

Control SystemFull Electronic Control System, All Connectors and Wiring Looms WaterproofCooling SystemTop Tank Temperature 108 °C (226 °F) As Standard to Minimize Cooling Pack Size
Designed to Withstand Harsh Offhighway Environments50:50 Water Glycol Mix, Detailed Guidance on Cooling System Design
Flexible and Configurable Software FeaturesValidation Available to Ensure Machine Reliability
Well Supported Sae J1939 Can Bus Enables Highly Integrated Machines
Exhaust SystemDiesel Particulate Filter and Regeneration System Supplied, with a Range of Inlet and Outlet OptionsLube SystemWide Choice of Sumps for Different Applications
Fuel SystemElectronic High Pressure Common Rail
Acerttm Technology, Innovative Filter Design to Ensure Maximum Protection of the Engine

Standard of C9.3-ME416 Marine Main Engine

Fuel System1. Fuel Transfer PumpExhuast System1. Exhuast Manifold
2. High-Pressure Fuel Pump2. Turbocharger
3. Fuel Filter3. Exhuast Elbow
Air Intake System1. Air Intake ManifoldStarting System1. Starter Motor
2. N/A2. Starter Rely
Cooling System1. Water PumpPower Output System1. Flywheel
2. Engine Fan2. Standard Flywheel Housing
3. Standard Radiator3. N/A
Lubricating System1. Oil PumpCharging System1. Charging Alternator
2. Oil Filter2. N/A
Engine Shut-Down System1. Engine Fuel Shut-Off SolenoidrEngine Mounting System1. Engine Mouting Bracket
Engine Auiliary Accessories1. Air Compressor

Optional Accessories of C9.3-ME416 Marine Main Engine

Air Intake System1. Air Intake Pre-HeaterExhuast System1. Muffler & Bellows
2. Air Intake Shut-Off Valve2. Flame Trap
3. Air Filter3. Spark Arrestor Type Muffler & Bellows
4. Air Intake Pre-Filter4. Dpf System
5. Air Filter Alarm System5. N/A
Fuel System1. Coarse FilterLubricating System1. Oil Pre-Heater.
2. Fuel Pre-Heater2. N/A
Starting System1. Manual Magnetic Dc ContactorCooling System1. Silent Type Radiator
2. Dual Ears Flywheel Housing2. Plateau Radiator
3. Spring Starter Motor3. Salt-Spray Resistant Radiator
4. Air Starter Motor4. Coolant Pre-Heater
5. Hydraulic Starter Motor5. Jacket Water Heater
6. Manual Magnetic Dc Contactor6. N/A
Engine Auiliary Accessories1. Hydraulic Oil PumpControl System1. Can Add Engine Monitoring System, Contro System With Wiring Harness.
2. Air Conditioner Compressor2. Can Add Self-Protection System that Integrated with Alarm System.
Power Output System1. ClutchEngine Mounting System1. Shock Absorber Pad

Modifiable Components of C9.3-ME416 Marine Main Engine 

Air Intake System1. Installation Position of Air FilterCharging System1. 12 V Charging Alternator for 12 V Electric System
2. Upgrade to Heavy-Duty Type Air Fitler2. Explosion-Proof Charging Alternator
3. N/A3. Upgrading to Specified Brand and Speicifications of Charging Alternator
Exhuast System1. Water-Cooled Exhuast ManifoldLubricating System1. Oil Pan Position
2. Water-Cooled Turbocharger2. Number of Dipstick
3. Can Modify Installation Position and Direction of Turbocharger3. Position of Dipstick Can Choose from 6 Positions
4. N/A4. Can Modify Oil Filter to be Remote Installation
Engine Shut-Down System1. 12 V Solenoid for 12 V Electric SystemStarting System1. Upgrading to Specified Brand and Speicifications of Starter Motor
2. Explosion-Proof Solenoid2. 12 V Starter Motor for 12 V Electric System
Fuel System1. Upgrade to Fuel Fitler that Integrated with Fuel Transfer Pump and Fuel Pre-HearterEngine Auiliary Accessories1. All of auxiliary System can Choose Specified Brands and Specifications
2. N/A2. Additional Auxiliary Systems Can be Added for Special Applications
Cooling System1. Can Modify Engine fan Into Blower Fan or Suction FanPower Output System1. Can Modify Size of Flywheel Housing and Flywheel
2. Can Modify Central Position of Engine Cooling Fan2. Dual-Ear Flywheel Housing (For Twin-Starter System)
3. Can Choose Type of Engine Fan From Mechanical Type or Electric Type3. Some of Models can Modify Flywheel Housing Into PTO Integrated Type
4. N/A4. Engine Have Connecting Port of PTOs, That Able to Provide Power Output
Engine Mounting System1. Can Modify Engine Mouting Bracket

Note: All Above Data are Just for Referenece, All Data Might Change Without Notices or Update, Please Contact Our Sales Team to Confirm All Details Via WhatsApp or Email.

What's the Standard Scopes of Supply?

With full ranges of emission standard from Euro 2 to Euro 7, caterpillar producing 12 series marine Main engines, started from 3.9 liter engine, to 15 liter engine, covering the power range of 125HP to 650HP.
caterpillar marine Main engine customize developing configurations for big vehicle OEMs in China, based on each of requirement, caterpillar producing dozens of different configuration engines with same engine model number, which only SO-Shop Order will be different with each other, the SO number is the identify number of the engine configuration of each model.
Even with same engine model, different SO number engine can have very different configuration with each other, with different prices. Some of SO-Shop Order is not available for commercial market, such as restricted models (Usually for military specifications).
EMAC offering most common, cost effective models which also able to process the production in caterpillar, which usually have following accessories as standard configuration.

Scopes of Supply of CAT Marine Main Engine

Air Intake System1. Air Intake Manifold        Exhuast System1. Exhuast Manifold
2. Air Filter2. Turbocharger
3. N / A3. Exhuast Elbow
Starting System1. Starter Motor        Charging System1. Charging Alternator
2. Starter Rely2. N / A
Lubricating System1. Oil Pump        Fuel System1. Fuel Transfer Pump
2. Oil Filter2. High-Pressure Fuel Pump
3. N / A3. Machanical Governor
4. N / A4. Fuel Filter
Engine Shut-Down System1. Engine Fuel Shut-Off Solenoid        Power Output System1. Flywheel
2. N / A2. Standard Flywheel Housing

What's the Available Optional Items?

Cat only provides customize service for the large quantity orders or large OEMs, which means usually the order quantity are higher than 1000 units. For the small quantity Engine project, EMAC provides customize services with our own resource and Engine team.
EMAC have rich experience on the customize developing, which provides abundant optional items based on the requirement of each project. The typical optional items are special Prestolite charging alternator, prestolite starter motor, Knorr Air compressor. Valeo air conditioning compressor, ECU output socket set, Engine accelerate pedal etc.

Optional Accessories of CAT CAT marine Main Engine

Air Intake System1. Air Intake Pre-Heater Exhuast System1. Muffler & Bellows
2. Air Intake Pre-Filter2. Flame Trap
3. Air Filter Alarm System3. Spark Arrestor Type Muffler & Bellows
4. N / A4. DPF System
Fuel System1. Coarse Filter Engine Auiliary Accessories1. Hydraulic Oil Pump
2. Fuel Pre-Heater 2. Hydraulic Cluch
Starting System1. Manual Magnetic DC Contactor Cooling System1. Engine Monitor
2. Dual Ears Flywheel Housing 2. Engine Protection System With Alarm System
3. Spring Starter Motor 3. Machanical Engine Control Lever Syste
4. Air Starter Motor 4. Electric Engine Control Lever System
5. Hydraulic Starter Motor 5. N / A
6. Manual Magnetic DC Contactor 6. N / A
Power Output System1. Gear Reduction Gearbox Cooling System1. Coolant Pre-Heater
2. Reverse Gear Box 2. Jacket Water Heater
Lubricating System1. Oil Pre-Heater Engine Mounting System1. Shock Absorber Pad

Committed to providing reliable premium propulsion system and power system for all kinds of ships around the world, SeaMac is a sub-brand of EMAC group that focused on maritime application.
SeaMac's ranges of products mainly inclduing marine main Engine, marine gearbox, marine propellers, marine control lever system, marine auxiliary Engine, marine Engine set and emergency Engine set.
For more information of our marine proplusion and power system products, you are welcome to visit SeaMac homepage:

What's the Modifiable Items and Scopes?

As explained in the standard scopes of supply, caterpillar not able to provide customize developing for small quantity projects or small OEMs, so EMAC helps SME OEMs to provide customize services, not only providing additional optional items, but also provides customize modification services to meet their requirements based on the exisiting Engine SO number.
As flexible service ability is our core advantages, EMAC is very experienced and good at providing customize services, the common customize services are as below:
1: AIr Intake System: Change the air intake direction.
2: Air Exhuast System: We are able to change the turbocharger direction as the interaction on installation could be occured, also change change the air exhuast direction.
3: Lubricating System: Modify lubricating system is one of the most common requirement from customer, we can provide flat-type Engine oil pan, to lower down total Engine height, which usually required for special vehicles. For the standard Engine oil pan, we also can change the direction of the Engine oil pan.
4: Cooling System: There are lots of options for the Engine cooling system, for the Engine fan, we can provide customize for the material of Engine fan (plastic fan or steel fan), wind direction of the Engine fan (blower fan or suction fan ) and types of Engine fan (mechanical fan or electric control fan).
5: Power Output System: Most of electronic controlled caterpillar marine Main Engine are comes with SAE#1 flywheel housing now, while lots of customers need SAE#2 flywheel because of the housing of transmissio is SAE#2, so we have to provide customzie services for those customer, which need to modify flywheel housing, flywheel and starter motor, we also have PTO integrated type flywheel housing available, which can output the whole power of the Engine from the PTO on the flywheel housing, we can also provide modification of the mounting side of the starter motor.
6: Electric System: All of caterpillar Engine are comes with standard 24V electric system, while some customer need to modify the electric system into 12V, we can also modify the starter motor and alternator into appointed brand or appointed specifications.
EMAC is your reliable professional power system partner, feel free to contact our services team to get detailed information about our standard scopes of supply, optional items and modifiable parts for our caterpillar marine Main Engine, we are ready to explore the journey of our cooperation.

How to Order Engine to Replace Your Old Engine?

There are three types of Engine replacements demand, type A is to replace the old caterpillar Engine, the original Engine is produced by caterpillar, type B is to replace caterpillar Engine produced in other countries including UK, USA, Mexico, India or Japan Komatsu caterpillar, type C is to replace other brands Engine or even gasoline Engine with caterpillar produced Engine. The detailed introduction and replacement process are as below:
Type A: Engine Replacement Requirement (Original Engine is caterpillar Engine).
This is most simple demand case, you just need to provide us the original Engine name plate, and then we can easily check and confirm what exactly you need, and we also ensuring that the Engine from us will be 100% same with your original Engine. (In some case that the vehicle manufacturing modify the Engine on their own, we are not able to supply the parts or the condition that modified by the vehicle manufacturer)
Type B: Engine Replacement Requirement (Original Engine is caterpillar Engine but produced in UK, USA or other caterpillar Engine plant).
EMAC have rich experiences in replace the UK, USA or other Engine plant produced Engine, with caterpillar produced caterpillar Engine, we required the original Engine name plate photo to obtain the related information (at least we will need Engine serial number, with Engine model name only is useless for us, we are not able to provide quotation with Engine model name only for the replacement project), and then we can check out the BOM list and all accessories of your original Engine serial number, and then we can check and compare with the BOM list of our caterpillar produced Engine, choose the most closest SO number Engine, and modify the parts that not same with your original Engine, we have delivered hundreds of cases of replace the customer's original Engine that produced in caterpillar UK, USA or other Engine plants with caterpillar produced Engine, you can refer to our video introduction on Youtube:
We can NOT guarantee the Engine produced by caterpillar is exactly same with your original Engine, but we can guarantee that all of Engine from EMAC will have no problem with installtion and performance, which all of Engine can works very well after replacement.
Type C: Engine Replacement Requirement (Original Engine is other brnad Engine even gasoline Engine).
EMAC also have rich experiences in replace the Engine that not caterpillar installed, these Engine can be other brands such as Deutz, caterpillar, Perkins, Komatsu or others, we even had experiences of replace gasoline Engine with caterpillar produced diesel Engine.
This kind of appliaction is more complex and quite risky, EMAC can't do much thing due to lacking of information, the only thing we can guarantee is the performance after replacement, we check and compare the Engine performance curve of original Engine and our caterpillar Engine, and then we select the most suitable model for replacement. Due to we are lacking of the installation spaces and related accessories, we will send the both CAD and 3D drawing for our recommend Engine model, and then customer have to evaluate the risky of replace the original Engine with our Engine, especially the risky of space, the possibile interactive when installation, and the risky of modify related coolant pipe, air pipes and wiring harness. Normally this kind of request consuming lots of energy and resource for us to carry on, also quite risky for us, so we will not work on the replacement quantity that below 50 units.
When your requirement is replacement, please tell our customer service team of what type of replacement you need, and provide us original Engine name plate, the Engine name plate is the necessary material before we start our business negotiations, we will NOT reply to all inquiry that even can't provide Engine name plate.

How to Choose the Right CAT Marine Main Engine for You?

To choose a suitable Engine for truck, bus or special vehicle manufacturer is quite simple, because the buyer is the manufacturer, so usually they are quite flexible with space, pipes and wiring connections.
The following process are the standard process for us to select a suitable Engine model for truck, bus or special vehicle manufacturer demand.
Step 1: We need basic information of the required Engine, including rated power, rated speed and emission standard of the required Engine.
Step 2: EMAC will evaluate the requirement and select the suitable Engine model for customer, with Engine data sheet, Engine performance curve, CAD darwing, 3D model and budgetary quotation provided back to customer.
Step 3: Customer should check and compare the Engine data sheet, performance curve and related drawing and confirm all details one by one. Most important thing is confirm the performance curve suitable for the requirement.
Step 4: After Engine confirmed, we have to check and confirm the specifications of accessories one by one carefully, like the electric system specifications (12V or 24V), the detailed specifications of starter motor, charging alternator, air compressor, power steering pump, A/C compressor etc.
Step 5: Confirming the accessories positions and connections, customer need to check and confirm all positions are suitable for the project, such as Engine fan, turbocharger, oil pan position, and connections of air pipe, coolant pipe, wiring harness etc.
Step 6: After confirming the Engine performance, position, connection and specifications of all accessories, we will be able to provide accurate quotation for prototype and batch order. Prototype is strongly recommend to start the cooperation, to avoid the possible problem, risky on the Engine with batch order.
1: Technical support including technical training, onsite installation and commissioning services are avaiable with additional chargers.
2: We are able to supply complete powertrain system, including Engine, transmission, transfer, axle, suspension etc, Engine with transmission is highly recommended, because if we supply both Engine and transmission, we can run simulations for the vehicle, which we usually will provide customer a simulation report, with the simulated result of Balanced Maximum Vehilce Speed and Maximum Grade Ability at different speed.
3: EMAC able supply complete chassis that integrate all powertrain system together, which can greatly reduce the manufacturer's design works and reduce the system mismatching risky.

Tips of CAT Marine Main Engine!

caterpillar is one of 50:50 joint venture of caterpillar in China, its official caterpillar factory that following high caterpillar USA production and quality control standard, the caterpillar factory swap every 5 years between appointed employee from caterpillar Motor and caterpillar. For more details, you can refer to the company introduction of caterpillar Engine Company.

Started the production of caterpillar Engine in China in 1980s, caterpillar products has been in China for over 40 years, thousands of people have worked for caterpillar China and some of them are very skilled experienced engineer, some of them resigned from caterpillarto set up their own small workshops or assembly factories that focusing on producing copy caterpillar Engine.

Price is always not the problem for Chinese suppliers, there are many tickies to lower down the Engine prices, such as supply self-rebuild Engine as new Engine, supply official RECON Engine from caterpillar as brand new Engine, assembly the fake Engine with after-market parts, supply lower power model Engine and change the name plate etc. You can find plenty of suppliers on with various prices, the classic Chinese business style is tell you that he give you very low price and not make profit, how can you believe a businessman will make business that have no profit? They gave you low price not becuase they share their profit to you?
As a matter of fact, Chinese supplier often make their profit much more higher by selling the low quality copy products as genuine brand new products! Always remember YOU GET WHAT YOU PAID!
The key point of dealing with Chinese supplier, is to find and choose reliable business partner that will not cheat you for short-term business, but with vision of build long-term career and life-time partnership, EMAC is one of the reliable partner that not chasing for short-term high profit, but we cares our decades of good reputation and we working with all business partners not as supplier and customers, but as close friend and brothers.

FAQ of CAT Marine Main Engine?

1: What mean by CAT?
CAT is the short name of caterpillar caterpillar Company, take the first letter of each word, it comes with caterpillar as short name, for more details about caterpillar, you can refer to the company introduction of CAT caterpillar Company.

2: Does your caterpillar copy products?
This question is quite often from customer that not familiar with caterpillar, caterpillar have over 20 joint ventures in China now, and 6 of them are caterpillar joint venture, which caterpillar owns 50% share of all of those 6 caterpillar plants, so all of the caterpillar factories in China are genuine caterpillar factory, that following high caterpillar USA production and quality control standard. EMAC is the business partner of caterpillar, and we are supplying powertrain and caterpillar power pack based on genuine brand new caterpillar from caterpillar for all different applications, EMAC is a reliable and professional power system solution provider that offering abundant various options.
3: Why there are so many companies selling CAT caterpillar?
There are plenty of companies selling CAT caterpillar in China, especially on the B2B platform, such as, you can find plenty suppliers there with attractive prices, caterpillar products has been in China for over 40 years, thousands of people have worked for caterpillar China and some of them are very skilled experienced caterpillar, some of them resigned from caterpillar to set up their own small workshops or assembly factories that focusing on producing copy CAT caterpillar. You should be careful of being cheated by the attractive prices with copy or rebuild products.
4: How can I identify if the caterpillar genuine or not?
caterpillar keep working on the updating its identification system, technically, there are serial number on all key components of CAT caterpillar, including cylinder block, cylinder head, turbochager, fuel pump, starter motor, alternator, you can collecting the serial number (NOT part number), and then call caterpillar call service center to identify if all the numbers are matching to the original number or not. EMAC continuously updating the latest caterpillar identification system, you are welcome to following our website or keep in touch with our customer services team to get latest information from caterpillar.
5: What's the warranty policy for the caterpillar supplied by EMAC?
EMAC following standard caterpillar warranty policy, which will update sometimes, you can following us to get the latest warranty policy from caterpillar. Generally EMAC only afford the defective parts cots and shipping costs for the warranty claims, labor costs and transportation costs are not covered in the warranty.
However, EMAC is building our own independant after-sales service system now, which aims to build a global service network, with resouces of global repair and caterpillar network, which we believe can bring all business partner benifit in future, helping all of OEM manufacturers expanding their market into global market without worries of lacking after-sales service network. For more details about our Global Service, you can visiting
6: How about the future parts supply for the caterpillar? Are you able to supply parts?
As the support team of EMAC's business scope, PartMac is our own brand that focusing on genuine parts directly from all brand factories.
All of EMAC’s partners are facing big challenges with sourcing original spare parts in China. Committed to providing truthworthy and professional after-sales support and parts supply, PartMac is a sub-brand of EMAC group that focusing on parts business. Stick to original parts only, PartMac can’t give any solution on CHEAP PARTS, but you don’t need to worry about any quality issues with every single parts from PartMac.
The picture of Sale Manual showing the accessories and scopes of supply.

Engine Sale Manual

The picture of Installation Drawing showing the accessories and scopes of supply.

Installation Drawing

The picture of Installation Manual showing the accessories and scopes of supply.

Installation Manual

The picture of Operation Manual showing the accessories and scopes of supply.

Operation Manual

The picture of Engine Parts Catalogue showing the accessories and scopes of supply.

Parts Catalogue

The picture of Test Report and Certifcate showing the accessories and scopes of supply.

Report & Certifcate

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