Engine Room Parts
Filters & Separation
Advanced filtration and water separation systems for marine diesel engines
Request QuoteFiltration That Protects Your Engine
Fuel and oil filters are the first line of defense for marine diesel engines. Mercer Yachting supplies OEM-specification filters, water separators, and advanced filtration systems designed for the demanding conditions of superyachts, cruise ships, and commercial vessels. Proper filtration extends engine life, reduces maintenance costs, and ensures compliance with marine environmental standards.
What We Supply
Fuel Filtration
Primary and secondary fuel filters, coalescers, duplex systems, water separators engineered for heavy fuel oil and marine diesel
Lube Oil Filtration
Engine oil filters, strainers, and filter housings for main engines and auxiliary generators
Hydraulic Filtration
Hydraulic system filters, return filters, and breather elements for deck machinery and propulsion systems
Coolant Filtration
Cooling system filters and cartridges for heat exchanger protection
Centrifugal Separators
Heavy-duty centrifuges for fuel and oil purification in shipboard applications
Strainers & Screens
Magnetic and suction strainers, deck wash strainers, and sea chest screens
How to Specify
Provide These Details
- Engine make, model, and serial number
- Filter micron rating (if replacement element)
- Current OEM part number or cross-reference
- Filter housing or cartridge type (spin-on, cartridge, bowl)
- System operating pressure and flow rate
- Bypass or full-flow configuration
- Material compatibility (brass, aluminum, stainless)
- Element type (paper, synthetic, mesh, magnetic)
Common RFQs We Handle
Racor Fuel Filter CAT C32
Primary/secondary duplex system with water separation for Caterpillar diesel engines
Duplex Fuel Filter 30 Micron
Heavy fuel oil purification system with switchover valves for uninterrupted operation
Oily Water Separator Pads
Replacement cartridges and maintenance kits for bilge treatment systems
HEPA Air Filter MTU Engine
High-efficiency particulate air filter for auxiliary generator intake
Hydraulic Return Filter 10 Micron
Deck machinery hydraulic system filtration cartridge
Oil Filter Spin-On Rolls-Royce
Main engine lube oil filter for marine gas turbine installations
Fuel Coalescer Element
Water removal element for marine fuel treatment
Bypass Filter Head Assembly
Main engine bypass filtration with pressure relief valving
Sea Chest Strainer
Raw water intake strainer 100-200 micron for seawater cooling systems
Magnetic Drain Plug
Oil drain cartridge with ferrous particle collection
Filter Housing Gasket Kit
O-rings and seals for spin-on filter bowl applications
Centrifuge Separator Bowl
Heavy-duty fuel/oil purification bowl assembly
Coolant System Filter Head
Engine jacket water and heat exchanger filtration unit
Fuel Tank Deck Strainer
Suction and return strainer for fuel transfer operations
Air Breather Filter Element
Oil tank and hydraulic reservoir breathing cartridge
Frequently Asked Questions
What micron rating should I specify for fuel filtration?
Primary fuel filters typically range 20–50 micron, while secondary filters are 3–10 micron. Heavy fuel oil systems often use duplex configurations with 30 micron primary and 6 micron secondary elements. Consult your engine OEM specification for exact requirements.
How do coalescer elements improve fuel quality?
Coalescers remove free and emulsified water from fuel by merging water droplets into larger globules that settle out. This prevents water from reaching the fuel injection system, which can cause corrosion and injection failure.
What is the difference between spin-on and cartridge filters?
Spin-on filters are complete, self-contained units that screw directly onto a filter head. Cartridge filters have replaceable elements inside a permanent housing. Cartridge systems reduce waste and are more economical for high-flow applications.
When should duplex fuel filter systems be used?
Duplex systems with switchover valves are essential on vessels where fuel consumption cannot be interrupted. One filter element remains online while the other is serviced, ensuring continuous engine operation during maintenance.
How do oily water separators meet IMO discharge standards?
OWS units use coalescence, gravity settling, and sometimes electrocoagulation to reduce oil content in bilge discharge to under 15 ppm (parts per million), meeting MARPOL Annex I requirements.
What maintenance interval applies to lube oil filters?
Intervals typically range from 250–2,000 operating hours depending on engine type, service conditions, and oil quality. Always follow your engine manufacturer's recommendations and conduct oil analysis to optimize intervals.
Can I use aftermarket filter elements in OEM housings?
Cross-contamination and inadequate performance can result from mixing aftermarket elements with OEM housings. We recommend OEM elements or certified equivalent products verified for the specific application.
What is a bypass filter system and when is it used?
Bypass filters operate in parallel with the main oil filter, capturing smaller particles (3–10 micron) that would otherwise circulate. They extend main filter life and reduce wear in high-soot environments like slow-speed diesel operation.
Delivery Footprint
Mercer Yachting delivers across the Mediterranean — Malta, Antibes, Palma de Mallorca, Barcelona, Genoa, Athens, Split — and worldwide via our global logistics network. Emergency parts dispatched same-day from our Malta hub.
Ready to Request Filters?
Our engine room specialists can source OEM filters, water separators, and replacement elements for any vessel. Contact us with your engine details and filtration requirements for a rapid quote.