Yamaha F4 Fuel Filter Replacement
A clogged fuel filter starves your 4 hp Yamaha F4 of fuel — hard starts, hesitation and lost power at speed. Below is the exact filter that fits, a step-by-step video, and the symptoms to look for.
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Watch: how to do it (step by step)
How to Replace Fuel Filter – Yamaha F4B
Yamaha Outboard F2.5A, F4B, F5A, F6C 2015 Onwards – How To Change The Fuel Filter
Tools Needed
- Replacement fuel filter for Yamaha F4B
Safety
- Ensure the fuel switch is turned to the far right to turn off the fuel supply from both internal and external tanks.
Steps
- Locate the fuel filter, which is visible with the cowling off.
- Identify the two clips securing the hoses to the fuel filter.
- Slide the clips off the hoses to release them from the fuel filter.
- Pull the hoses off the fuel filter.
- Remove the old fuel filter by rotating it and pulling it off.
- Inspect the new fuel filter for the flow direction arrow.
- Connect the rear hose to the new fuel filter.
- Connect the front hose to the new fuel filter.
- Ensure the clips are back on and the hoses are pushed up.
- Reinstall the spacer clips.
Tips
- The fuel filter is non-serviceable and must be replaced when needed.
- The fuel filter serves both the internal and external tanks.
- A small amount of fuel dripping from the fuel pump is normal during this process.
Which part do I need for my Yamaha F4?
For most F4 owners the part above (18-7736) is the right choice. Price tip: the aftermarket numbers are usually noticeably cheaper than the OEM-branded box — it is the same physical part. If you need an exact match, these compatible part numbers also fit:
Show all compatible part numbers (1)
| Part number | Description | |
|---|---|---|
| 18-7766 | Sierra 18-7766 | Find on Amazon → |
Many of these are the same physical part under different brand numbers. Confirm against your engine plate before ordering.
Frequently asked questions
What fuel filter fits a Yamaha F4 (4 hp)?
The Yamaha F4 uses the fuel filter sold as 18-7736, plus its OEM and aftermarket cross-references (1 compatible numbers are listed above). Confirm the number against your engine's model code and year plate before ordering.
How often should I replace the fuel filter on a Yamaha F4?
Replace the fuel filter once a season or per the service manual — and sooner after a batch of dirty fuel or water in the separator.
What are the symptoms of a clogged fuel filter on a Yamaha F4?
Hard starting, hesitation or surging under load, stalling at higher throttle and a general loss of power. The engine typically runs fine at idle and starves when fuel demand rises.
Do I need to bleed or prime the fuel system afterwards?
On diesel engines, yes — air must be bled from the fuel system after the filter change, and the video shows the procedure. On petrol outboards, squeeze the primer bulb firm before starting.
How long does a fuel filter change take on a Yamaha F4?
Usually 30-60 minutes including priming or bleeding — a straightforward DIY job with basic tools.
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