Yanmar 3GM30 Fuel Filter Replacement
A clogged fuel filter starves your Yanmar 3GM30 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 – Yanmar 3QM30
Bleeding fuel line on a Yanmar 3GM30F marine diesel
Tools Needed
- Primary fuel filter pump
- Secondary fuel filter bleed screw
- High-pressure pump bleed nut
- Rags for cleanup
Safety
- Ensure the engine is off and cool before starting.
- Wear gloves to protect hands from diesel.
Steps
- Open the primary fuel filter and start pumping the primary fuel filter pump.
- Pump until fuel starts squirting out, then close the primary fuel filter.
- Open the bleed screw on the secondary fuel filter (the back one).
- Pump the primary fuel filter pump again to bleed air from the system.
- Locate the bleed nut for the high-pressure pump and crack it open slightly.
- Pump the primary fuel filter pump until fuel starts squirting out of the bleed nut.
- Close the bleed nut once fuel is squirting out with no bubbles.
- Open the decompression levers to prevent engine compression.
- Start the engine to cycle fuel through the lines without turning the engine over.
- Close the decompression levers once the engine starts.
Tips
- Pumping the primary fuel filter pump can save time and effort compared to using the lift pump.
- Make sure to close the primary fuel filter and bleed nut properly to maintain pressure in the system.
- Opening the decompression levers can help start the engine without trying to turn it over.
Which part do I need for my Yanmar 3GM30?
For most 3GM30 owners the part above (104500) 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 (6)
| Part number | Description | |
|---|---|---|
| 128270 | Yanmar, Air Filter, 128270-12540 | Find on Amazon → |
| 24341 | Yanmar, Fuel Filter O-Ring, 1A S-44.0, 24341-000440 | Find on Amazon → |
| YAN104500-55710 | Yanmar Secondary Fuel Filter | Find on Amazon → |
| YAN128270-12540 | Yanmar Air Filter ( Intake Element ) | Find on Amazon → |
| YAN23418-060000 | Yanmar Nylon Secondary Fuel Filter Housing Bleed Washer | Find on Amazon → |
| YAN24341-000440 | Yanmar Secondary Fuel Filter O-Ring 1A S-44.0 | 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 Yanmar 3GM30?
The Yanmar 3GM30 uses the fuel filter sold as 104500, plus its OEM and aftermarket cross-references (6 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 Yanmar 3GM30?
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 Yanmar 3GM30?
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 Yanmar 3GM30?
Usually 30-60 minutes including priming or bleeding — a straightforward DIY job with basic tools.
Related guides
- Yanmar 2GM20 fuel filter
- Yanmar 3GM30F fuel filter
- Yanmar 2GM20F fuel filter
- Yanmar 3HM35 fuel filter
- All Yanmar maintenance guides
- Free Yanmar boat valuation
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