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Mercury Fuel Filters

Fuel / Water Separating Filter – Mercury, Mariner & MerCruiser

SKU: ME35-60494

$20.90
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Mercury 35-52456 is an older OEM marine spin-on fuel/water separating filter used on Mercury/Mariner outboard and MerCruiser petrol fuel systems. Mercury has superseded 35-52456 → 802893Q01, making 802893Q01 the current functional replacement. Please note this filter cannot be used with removable clear or aluminium bowls.

Key benefits

Key Benefits

  • Separates water from petrol before it reaches the engine
  • Removes rust, dirt and other fuel-system contaminants
  • Available in 10-micron aftermarket replacements
  • Suitable for marine petrol applications
  • Suitable for external fuel/water separator installations
  • Helps protect carburettors, fuel pumps and EFI components

Compatible Mercury Outboards

  • 35-52456 is an external fuel/water separator, so fitment is primarily determined by the installed filter head rather than simply the outboard horsepower.

Suitable for many older Mercury petrol outboards, including installations across

  • 2-Stroke Mercury
  • 25 HP, 30 HP, 35 HP, 40 HP, 45 HP / Jet, 50 HP, 55 HP, 60 HP, 65 HP, 70 HP, 75 HP, 80 HP, 90 HP, 100 HP, 115 HP, 125 HP, 135 HP, 150 HP, 175 HP, 200 HP
  • 225 HP, 250 HP
  • It may also be used with compatible later Mercury FourStroke, EFI and Optimax installations where the boat is equipped with the matching remote 11/16"-16 filter head.

Mariner Outboards

  • The same filter system is widely applicable to Mariner 2-stroke and 4-stroke petrol outboards using the Mercury/Mariner external fuel/water separator head.
  • Typical applications include 25 HP through 250 HP+ installations, subject to the boat's filter system.

MerCruiser Applications

  • 35-52456 also belongs to the MerCruiser fuel/water separator family. Sierra specifically cross-references it under both Mercury Marine and MerCruiser Stern Drive applications.
  • Typical petrol installations include compatible
  • 3.0L, 4.3L V6, 5.0L V8, 5.7L V8, 6.2L V8
  • Other carburetted and EFI MerCruiser petrol engines fitted with the corresponding remote filter head
  • For a specific MerCruiser engine, serial-number verification is recommended.

Cross-Reference Part Numbers

  • Mercury 35-52456, Mercury kit 35-52456A1, Mercury 35-55501, Mercury 35-57250, Mercury 35-60494, Mercury 35-604941
  • Mercury 35-60494A5, Mercury 35-805269, Mercury 35-8052691, Mercury 35-806771, Mercury 35-807172, Mercury / Quicksilver 35-802893Q
  • Mercury / Quicksilver 35-802893Q01, Mercury 802893T, Mercury current replacement 802893Q01, Sierra – 10 micron short 18-7944
  • Sierra – 10 micron long 18-7945, Sierra – 21 micron short 18-7844, Sierra – 21 micron long 18-7845

Suitable Applications

  • Best suited to boats fitted with an external Mercury/Mariner/MerCruiser-style water-separating fuel filter system, including
  • Mercury outboards
  • Mariner outboards
  • MerCruiser petrol sterndrives
  • MerCruiser petrol inboards
  • Carburetted engines
  • EFI applications where specified
  • 2-stroke petrol systems
  • 4-stroke petrol systems
  • The critical fitment check is the 11/16"-16 filter-head thread.

Signs the Filter Needs Replacing

  • Replace during routine servicing or when there is
  • Water contamination in the fuel
  • Engine hesitation
  • Restricted fuel flow
  • Hard starting
  • Loss of power at higher RPM
  • Engine surging
  • Rust or corrosion on the filter canister
  • Known contaminated or stale fuel
  • For EFI outboards in particular, a quality 10-micron separator provides useful protection against fine contamination.

Shipping

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