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Sierra 18-7945 Fuel Water Separator Filter

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List Price: $8.99
Starting At: $6.99
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Sierra 18-7945 10 Micron Long Fuel Water Separator Filter

Sierra fuel water separators remove over 99.8% of emulsified water from your gasoline. Sierra's 10 micron filters are over 90% efficient at removing particles as small as 10 micron without starving your engine. Sierra canister fuel water separator filters are designed to be an exact fit and performance replacement for your current OEM canister filter, making installation easy! Sierra 10 micron filters are recommended to prevent damage to sensitive inboard and outboard fuel injection systems. Sierra's canister filters are tested to meet ISO, SAE and JIS standards.


  • Ethanol blended fuel absorbs more water and loosens more particulants than regular fuels
  • Proper filtration is required for every horsepower engine
  • Sierra's 10 micron filters are over 90% efficient at removing particles as small as 10 micron
  • All filters flow at 90 GPH to feed even the hungriest motor


  • Rating: 10 Micron
  • Filter Size: Long - 4.35" or 110.5mm
  • Thread Pitch: 11/16-16

Sierra recommends replacing your filters every 50 hours of operation or at a minimum of once per year, preferably at winterization. 10-Micron filters are your number one defense against problems cause by ethanol fuels. It is important that you do not over-tighten filters, and always inspect for leaks after installation.

Interchangeable with:

  • Honda Outboard
    • 17670-ZX2-000HE
  • Mercruiser Stern Drive
    • 35-807172
    • 35-604941
    • 35-60494
    • 35-55501
    • 35-57250
    • 35-60494A5
    • 35-806771
    • 35-8052691
    • 35-802893Q01
    • 35-802893Q
    • 35-802893T
  • Mercury Marine
    • 35-604941
    • 35-8052691
    • 35-807172
    • 35-802893Q
    • 35-52456
    • 35-802893T
  • Yamaha Outboard

California Residents: warning sign WARNING Cancer and Reproductive Harm -



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