Suzuki DF9 Oil & Filter Change
Fresh oil and a new filter are the cheapest insurance for your 9 hp Suzuki DF9. Below is the exact oil filter that fits, a step-by-step video of the full oil change, and what else you need for the job.
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Watch: how to do it (step by step)
How to Replace Oil Filter – Suzuki DF 100
Suzuki Outboard Complete Oil Change Tutorials 9.9HP, 15HP, 20HP
Tools Needed
- 8 mm socket
- 10 mm socket
- Pick (optional)
- Oil extractor hose
- Funnel
- Handheld pump
- New oil filter
- New O-ring
- New gaskets for screws
Safety
- Ensure the engine is cool before starting.
- Be cautious when handling oil to avoid spills.
Steps
- Remove the cowling to access the engine.
- Take off the rubber gasket.
- Use an 8 mm socket to remove the side panels.
- On models with power trim and tilt, remove the plug using a pick for easier access.
- Remove the fuel filter to access the oil filter.
- Use a 10 mm socket to take off the oil filter cover and remove the oil filter.
- Take out the dipstick and insert the extractor hose into the dipstick tube.
- Pump out all the old oil using the extractor hose.
- Install the new oil filter and swap out the O-ring in the cover.
- Ensure the arrow on the cover is facing down when reinstalling.
- Reassemble everything the way you found it.
- Add fresh oil using a funnel, checking the sticker on the motorhead for the recommended type and quantity.
- Double-check the dipstick to ensure it's properly filled.
- Slide an oil pan underneath the lower unit to keep things clean.
- Remove both screws at the bottom of the lower head.
- Replace the gaskets and reinstall the screws.
Tips
- Taking off the tubes makes the job easier, although it's not necessary.
- Use Suzuki XAR 10W40 oil for the engine and Suzuki Xar gear oil for the gear case.
Which part do I need for my Suzuki DF9?
For most DF9 owners the part above (18-7896) 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 | |
|---|---|---|
| 16510 | Oil filter | Find on Amazon → |
| 18-7903 | OIL FILTER | Find on Amazon → |
| 434839 | Oil filter | Find on Amazon → |
| 503353 | Oil filter | Find on Amazon → |
| 778886 | Oil filter | Find on Amazon → |
| Johnson/Evinrude 778886, 5033539 | Oil filter | 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 oil filter fits a Suzuki DF9 (9 hp)?
The Suzuki DF9 uses the oil filter sold as 18-7896, 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 oil filter on a Suzuki DF9?
Change the oil and filter every 100 running hours or once a season, whichever comes first (check your manual for the exact interval).
What else do I need for an oil change on a Suzuki DF9?
The correct grade and amount of engine oil (see the manual or the video), a new drain-plug washer, a filter wrench and a drain pan or oil extractor pump. Nothing exotic — it is standard service equipment.
What are the signs the oil is overdue on a Suzuki DF9?
Dark, gritty oil well past its interval, low-pressure warnings — and milky or grey oil, which means water is getting in and should be investigated immediately.
How long does an oil change take on a Suzuki DF9?
About an hour for a competent DIYer. Run the engine warm first — warm oil drains faster and carries more contaminants out with it.
Related guides
- Suzuki DF90 oil filter
- Suzuki DF60 oil filter
- Suzuki DF140 oil filter
- Suzuki DF70 oil filter
- All Suzuki maintenance guides
- Free Suzuki boat valuation
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