Description
Overview
The Sierra inline fuel filter 18-7856-1 delivers reliable protection for marine petrol engines. It connects directly to 5/16″ (≈ 7.9 mm) fuel lines and intercepts debris before it reaches sensitive components. Because it follows common GF-61, Fram G2, and Wix 33032 specifications, it suits a wide range of inline applications. Regular use improves fuel cleanliness and helps maintain consistent engine performance.
Features
- Compact inline design that fits standard 5/16″ fuel hoses
- Effective filtration for debris and rust particles down to approximately 29 microns
- Cross-references with widely used GF-61, Fram G2, and Wix 33032 elements
- Durable metal housing for marine environments
Specifications and Materials
| Part Number | 18-7856-1 |
| Fuel Line Size | 5/16″ / ~7.9 mm |
| Filtration Rating | ~29 micron |
| Housing | Metal body, corrosion-resistant |
For additional background on fuel filter construction and operating principles, consult the Fuel Filter technical article.
Compatibility and Fitment
This Sierra inline fuel filter suits small and medium marine petrol engines that rely on 5/16″ fuel hose. It also replaces equivalent filters from A.C. Delco, Fram, and Wix. Because engine designs can vary, confirm fitment by matching the part number to your engine manufacturer’s documentation. Proper installation ensures correct flow direction and secure hose clamping.
Compliance and Safety
Always relieve system pressure before replacing the filter. Check the hoses for wear, secure the clamps tightly, and inspect the connections after installation. Replace the filter at regular service intervals or sooner if fuel contamination occurs. Proper maintenance reduces fire risk and prevents damage to downstream components.
Marine Applications
Boats often face contaminated fuel, condensation, and varying storage conditions. This Sierra inline fuel filter provides a practical first barrier against these issues. It works well in trailer boats, runabouts, and auxiliary circuits where compact filtration is needed between the tank and the engine. Because it uses a common size, many boaters keep a spare filter on board for quick replacements.
Why Choose Argomarine
Argomarine focuses on clear technical information and dependable parts. We verify specifications carefully and highlight compatible systems so you can maintain your vessel confidently. To find more OEM and aftermarket service components, visit our Engine and Service Parts category.
