Main Engines
Catalog Overview
Main Engines
Marine main engines provide power for vessel propulsion. Fuel combustion drives the engine’s moving components, transmitting power to the propulsion system. Maintaining the engine’s combustion, lubrication and cooling functions supports the power needed to move the vessel through its operating conditions.
Main-engine work must be coordinated with the vessel’s operating and maintenance schedule. ATOZ checks availability across the specified repair or overhaul order, including difficult-to-source items, helping buyers identify delivery constraints and plan parts arrival around the agreed work window.
What We Can Supply
- Cylinder liners, pistons, piston pins and piston rings
- Cylinder covers, heads and combustion-chamber components
- Exhaust valves, spindles, seats and guides
- Main, crankpin and thrust bearings
- Connecting rods, crossheads, crankshaft components and related fasteners
- Fuel pumps, injectors, nozzles and fuel-system parts
- Cooling, lubrication, starting-air and exhaust components
- Gaskets, seals, O-rings and complete overhaul kits
Supported Manufacturers
Main Engines Manufacturers
Browse the manufacturers supported by ATOZ GROUP for Main Engines equipment and spare-part enquiries.
Have a request?
Send us manufacturer, model or part number and we will prepare a quote.
+371 27331127
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Related Categories
1,500+
Completed Marine Projects
40+
Countries Supported
Worldwide
Port & Vessel Delivery
OEM & Alternative
Spare Part Solutions
Frequently Asked Questions
Main Engines Supply & Support
What is a marine main engine used for?
A marine main engine supplies the mechanical power required to propel the vessel. Depending on the vessel, it may be a slow-speed or medium-speed two-stroke or four-stroke engine connected directly or through a gearbox to the propulsion system.
Which marine main-engine spare parts can ATOZ supply?
ATOZ can assist with cylinder liners, pistons, piston pins, piston rings, cylinder covers, cylinder-head parts, exhaust valve parts, valve spindles, seats and guides, bearings, connecting rods, related fasteners, crossheads, fuel injection components, cooling and lubrication parts, seals, gaskets and overhaul kits. Availability depends on the engine manufacturer and model.
Can ATOZ source parts for older main engines such as 7RTA 48T-B?
ATOZ can review requirements for older and difficult-to-source main-engine types, including 7RTA 48T-B. Provide the manufacturer, exact engine model, serial number, cylinder bore, part or drawing number and relevant manual pages so available options can be checked.
Can ATOZ supply complete main-engine overhaul sets?
Depending on the engine model and maintenance scope, ATOZ can assist with individual components or grouped overhaul sets for one or more cylinders. Provide the planned overhaul scope, cylinder positions, required quantities, part numbers and relevant manual pages.
What information should be included in a main-engine enquiry?
Provide the manufacturer, engine model, serial number, cylinder bore, part number, description, required quantity and delivery destination. Nameplate photographs, component markings, drawings and manual pages help prevent identification errors.
How quickly can ATOZ prepare a quotation?
Quotation time depends on the engine manufacturer and model, required components, material specification, certification, quantity and supplier availability. Complete technical information and delivery requirements help ATOZ prepare the quotation more efficiently.
Can ATOZ assist with main-engine inspection and overhaul work?
Depending on the project scope and vessel location, ATOZ can coordinate technical support for inspection, measurements, dismantling, component replacement, reassembly and testing. Send the engine details, work scope and vessel schedule so the available support can be reviewed.
Can main-engine spare parts be delivered during a port stay or dry-dock project?
ATOZ can coordinate delivery according to the vessel’s port call or dry-dock schedule, subject to availability and logistics. Include the port, ETA, ETD, required delivery date, equipment weight and local receiving arrangements in your enquiry.
Can’t Find What You Need?
We’ll Help You Find the Right Spare Part
The visible catalogue does not represent the full range ATOZ can source. Simply send us the equipment name, manufacturer, part number or available technical documentation. Our specialists will identify the correct spare part and and our team will review your requirement.