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The Best Sierra 18 7945 of 2025 – Reviewed and Top Rated

After hours researching and comparing all models on the market, we find out the Best Sierra 18 7945 of 2025. Check our ranking below.

2,408 Reviews Scanned

Rank No. #2
Sierra International 18-7946, Fuel Water Separator Filter (Pack of 2)
  • The information below is per-pack only
  • Rating: 10 Micron
  • Thread Pitch: 1"-12
  • Visit Amazon’s SONAR parts finder at fit-guideseastarsolutionscom to ensure this product will fit your application
  • All Sierra parts qualify for and are covered under Sierra's industry leading customer satisfaction warranty
Rank No. #3
256-07224-00 Fuel Water Separating Filter for MerCruiser – Replaces 35-60494-1, 35-807172, Sierra 18-7945 – Marine Outboard/Inboard Fuel Filter
  • Direct Replacement for MerCruiser – Fits most MerCruiser inboard/outboard engines. Replaces OEM part numbers 35-60494-1, 35-807172, Sierra 18-7945, Quicksilver 35-807172Q.
  • Protects Your Engine – Efficient fuel water separator removes dirt, rust, and water from gasoline, ensuring clean fuel and longer engine life.
  • Durable Marine-Grade Design – Built with high-quality, corrosion-resistant materials for reliable performance in harsh marine environments.
  • Easy Installation & OEM Fit – Same size and thread as factory filters, installs in minutes. Includes filter with built-in O-ring for leak-free fit.
  • Universal Marine Application – Compatible with many MerCruiser, Mercury, and marine fuel systems. Ideal for 3.0L, 4.3L, 5.0L, 5.7L engines.
Rank No. #4
Sierra International, 18-7985-1, Fuel Water Separator Kit
  • All filters flow at 90 GPH to feed even the hungriest motor
  • Prevent damage to sensitive inboard, sterndrive and outboard fuel injection systems
  • Sierra fuel water separators remove over 998% of emulsified water from your gasoline
  • Sierra's 10 micron filters are over 90% efficient at removing particles as small as 10 micron
  • Material : Stainless Steel (Tall Filter), Size: 3/8" or 95mm
Rank No. #5
Sierra International 18-7948, Fuel Filter 10 Micron
  • Fits: 320RRAC01
  • Spin on replacement
  • Rating: 10 Micron
  • Thread Size: 1" or 254mm - 14

Last update on 2025-09-05 / Affiliate links / Product Titles, Images, Descriptions from Amazon Product Advertising API

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