Sierra Marine Inline Fuel Filters: Micron Ratings & OEM Match

Sierra inline marine gasoline filters have different micron ratings and original-equipment applications. A smaller micron number describes the particle size a filter is designed to capture; it does not prove the filter fits an engine or fuel line. Compare the exact Sierra MPN, OEM number, connections and filter position before buying.

What identifies the correct fuel filter?

1. Exact part numberCheck the filter body, engine parts list and an original-equipment reference. A Sierra number is stronger evidence than appearance alone.
2. Physical installationCompare the body and seals, inlet/outlet connections, mounting and available clearance. OEM-style elements may not use universal hose-barb dimensions.
3. Filtration specificationCheck the micron rating required by that engine's fuel system. A finer filter may cause problems if substituted without approval.
Do not select by micron number alone. For example, a 20-micron Honda-reference element is not a general replacement for a 20-micron filter from another engine brand. Consult your exact engine model and serial-number parts manual.

Sierra inline marine fuel filter comparison

Sierra part Micron rating Listed application Identification reference
18-7715 140 µm Selected MerCruiser applications Original filter dimensions and OE part required
18-7981 4 µm Specified Mercury/MerCruiser systems Mercury 35-884380T / 35-8M0020349 references
18-79905 32 µm Specified Yamaha outboards Yamaha 69J-24501-10-00 reference
18-79908 20 µm Specified Honda outboards Honda 16911-ZY3-000 / 16911-ZY3-010 references

Listed engine families are not a complete fitment chart. Confirm exact OEM number and engine model before installation.

Five checks before ordering an inline fuel filter

  1. Identify the engine's model and serial range and find the manufacturer's specified fuel-filter part.
  2. Match the original Sierra or OE part number and inspect the removed filter's shape and seals.
  3. Confirm that the replacement has the correct fuel connection and housing arrangement. Do not assume an inline filter has universal hose barbs.
  4. Check the manufacturer-required micron specification rather than changing to a finer or coarser grade without approval.
  5. Install the correct gasoline-rated part, avoid spilled fuel and test for leaks in accordance with the engine service instructions.

Compare Sierra inline gasoline filters

Open each product to check the exact Sierra number and current online availability.

Related marine fuel parts

Need the fuel hose or primer-bulb assembly instead of a filter? Compare Sierra marine fuel-line connections.

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