Oil filter

Mercruiser oil filters and inserts - Engine oil filter spare parts

Mercruiser oil filters protect the engine by filtering impurities in the oil circuit and reduce wear, deposits and lubricant ageing. Matching filter elements according to reference number, engine type and year of manufacture ensure optimum lubrication, long engine life and stable operation in a maritime environment. The structured selection simplifies selection, maintenance and replacement.
Original spare part
Remote Oil Filter KIT, for Mercruiser V6 4.3L models 807459A3
Mercury-Mercruiser-Quicksilver
Remote Oil Filter KIT, for Mercruiser V6 4.3L models 807459A3
article nr.09855

Replaces the original filter on the block.

The oil filter is conveniently moved upwards.

514,92 EUR / Set
incl. 19% VAT
Lieferung Thu 06. Aug - Mon 10. Aug 2026 **
24 months statutory warranty
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  • Over 15 years’ experience in the marine spare parts trade
    Over 15 years’ experience in the marine spare parts trade
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    Official Mercury & MerCruiser dealer
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    A wide range of boat engine spare parts from A to Z
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    Spare parts for Volvo Penta, MerCruiser, Yamaha, Honda, Suzuki and more
  • Fast delivery for maintenance, servicing and repairs
    Fast delivery for maintenance, servicing and repairs
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    Order boat spare parts conveniently online 24/7

Function of the oil filter in the Mercruiser engine

The oil filter is a central component of the engine oil circuit. It removes suspended particles, metal abrasion and combustion residues from the engine oil and thus ensures clean lubrication of the bearings, pistons and valves. Effective filtration reduces friction, minimizes material wear and extends the service life of the engine.

Structure & technical features

A Mercruiser oil filter typically consists of:

  • Filter medium - fine-pored material for particle separation

  • Housing/can - pressure and temperature resistant

  • Seals/o-rings - for leak-free connection

  • Bypass valve - ensures oil pressure even with heavy contamination

Important selection criteria are filter fineness, size, connection thread and pressure resistance.

Selection by reference number & engine type

The most reliable assignment is made via the OEM reference number, as filters vary in length, diameter, sealing dimension and filter fineness. In addition, the engine type and year of manufacture provide information on the correct filter variant.

Recommended selection steps:

  1. Read the reference number on the old part or parts list

  2. Determine engine type and year of manufacture

  3. Select suitable oil filter according to OEM specifications

A structured comparison reduces incorrect orders and installation problems.

Installation & maintenance instructions

Please note the following when replacing an oil filter

  • Switch off & cool down the engine

  • Drain the oil correctly (dispose of the old one)

  • Lightly oil the new seal

  • Install filter hand-tight (observe manufacturer's torque)

  • Top up the oil and bleed the system

  • Visual inspection for leaks

A correctly fitted filter prevents oil loss and ensures a continuous lubrication circuit.

Change intervals & operating conditions

Oil filters should be changed regularly, in particular

  • after defined operating hours

  • in the event of increased dirt ingress (e.g. short journeys)

  • before longer seasonal journeys

A cyclical change protects against premature wear and ensures performance.

Diagnosis & typical damage patterns

Signs of a worn or clogged oil filter:

  • Abnormal oil pressure display

  • Low oil flow

  • Engine running irregularities

  • Increased wear on bearings

Early replacement protects the engine from consequential damage.