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Sierra 18-7844 Fuel Filter Replaces 35-802893Q01

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List Price: $11.99
Starting At: $8.99
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Sierra 18-7844 Water Separating Fuel Filter for Sterndrives and Outboards

Sierra replacement water separating fuel filter for use with Mercury and Mercruiser engines. Sierra fuel water separators remove over 99.8% of emulsified water from your gasoline. Sierra's 21 micron canister filters feature an epoxy-coated steel canister that prevents corrosion inside the canister from reaching your fuel system. These durable filters are pressure and leak tested to ABYC and USCG standards. All filters flow at 90 GPH to feed even the hungriest motor. Sierra 21 micron filters are recommended to prevent damage to sensitive inboard and outboard fuel injection systems.


  • Used on Mercruiser and Mercury Engines
  • 21 Micron Rating
  • 3.875" in Length (Short)
  • 11/16-16 Thread pitch

Sierra recommends replacing filters every 50 hours of operation, or at a minimum of once per year, preferably at winterization.

Interchangeable with:

  • Fram
    • PS3808
  • GLM
    • 24941
  • Mallory
    • 9-37800
  • Mercruiser Stern Drive
    • 35-52456
    • 35-55501
    • 35-57250
    • 35-60494
    • 35-604941
    • 35-60494A5
    • 35-802893Q
    • 35-802893Q01
    • 35-805269
    • 35-8052691
    • 35-806771
    • 35-807172
  • Mercury Marine
    • 35-604941
    • 35-802893Q
    • 35-8052691
    • 35-807172
  • Moeller
    • 33323-10
  • Valmar
    • 52113
  • Wix
    • 33225

California Residents: warning sign WARNING Cancer and Reproductive Harm -



Other Details

Google Product Type:
Fuel Filter
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