Sierra 18-7945 10 Micron Water Separating Fuel Filter

Reliable Fuel Filtration for Your Marine Engine

Clean fuel is essential for dependable engine performance on the water. The Sierra 18-7945 water separating fuel filter removes both water and particulate contamination from your fuel supply before it reaches your engine's fuel system. With a 10 micron filtration rating and over 90% efficiency, this filter catches fine debris that can cause injector fouling, carburetor blockages, and premature engine wear.

Why Water Separation Matters — Especially with Ethanol-Blended Fuel

Modern ethanol-blended fuels present unique challenges for marine engines. Ethanol absorbs more moisture from the surrounding environment than traditional gasoline, and it can loosen particulates and residues inside fuel tanks and lines. This is particularly relevant for Canadian boaters who may store their boats over long winter months, during which condensation can introduce significant water into the fuel system. The Sierra 18-7945 is specifically designed to separate water from fuel, helping to prevent corrosion, rough running, and potential engine damage caused by contaminated fuel.

High Flow Rate for Demanding Engines

With a flow rate of 90 GPH (gallons per hour), the Sierra 18-7945 can supply adequate fuel volume to high-performance outboard and sterndrive engines without creating a restriction. Whether you're running a single large outboard or a sterndrive setup, this filter keeps pace with your engine's fuel demands while still providing thorough filtration.

Wide Cross-Reference Compatibility

The Sierra 18-7945 is engineered as a direct replacement for a wide range of OEM fuel filter part numbers. If your engine currently uses any of the following filters, the 18-7945 is a compatible drop-in replacement:

• Honda: 17670-ZX2-000HE
• MerCruiser: 35-55501, 35-57250, 35-60494, 35-604941, 35-60494A5, 35-802893Q, 35-802893Q01, 35-802893T, 35-8052691, 35-806771, 35-807172, 35-52456
• Yamaha: ABB-FUELF-IL-TR

Simple Replacement for Routine Maintenance

Replacing your fuel filter is one of the most straightforward and impactful maintenance tasks you can perform on your boat. The Sierra 18-7945 is designed to fit standard water separating fuel filter housings, making seasonal filter changes quick and hassle-free. For Canadian boaters, replacing the fuel filter at spring commissioning — after months of winter storage — is a smart practice to ensure clean fuel delivery from the very first start of the season.

Trusted Sierra Marine Quality

Sierra Marine is a well-known name in the marine aftermarket parts industry, offering replacement components that meet or exceed OEM specifications. The 18-7945 fuel filter carries on that tradition, providing reliable filtration performance at a fraction of the cost of dealer-sourced OEM filters. It's a practical, cost-effective choice for boaters who want to maintain their engines without overspending on consumable parts.
 

Specifications

• Part Number: 18-7945
• MFG Part Number: 033323-10
• Filtration Rating: 10 micron
• Filtration Efficiency: Over 90%
• Flow Rate: 90 GPH
• Replaces Honda: 17670-ZX2-000HE
• Replaces MerCruiser: 35-55501, 35-57250, 35-60494, 35-604941, 35-60494A5, 35-802893Q, 35-802893Q01, 35-802893T, 35-8052691, 35-806771, 35-807172, 35-52456
• Replaces Yamaha: ABB-FUELF-IL-TR

Key Features Summary

• 10 micron water separating filtration — catches fine particles and removes water before they reach your engine's fuel system
• Over 90% filtration efficiency — provides thorough protection against contaminants that cause injector fouling and engine wear
• 90 GPH flow capacity — keeps up with high-demand outboard and sterndrive engines without restricting fuel supply
• Designed for ethanol-blended fuels — addresses the increased water absorption and loosened particulates common with modern gasoline blends
• Broad OEM cross-reference compatibility — direct replacement for Honda, MerCruiser, and Yamaha factory filter part numbers
• Drop-in replacement design — fits standard water separating filter housings for quick, straightforward seasonal maintenance
• Affordable aftermarket pricing — delivers reliable performance at a fraction of OEM filter costs