Engine data
Specifications for Yamaha F25| Power | 25 hp |
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| Cylinders | 2 |
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| Displacement | 432 cm³ |
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| Fuel | Petrol |
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| Type | Outboard |
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Autumn and spring plan for Yamaha F25
Here's what to do when hauling out and launching. Always follow the instruction book for your engine.
Autumn
- Change the engine oil and oil filter1.1 l YAMALUBE 4 or four-stroke outboard oil, SAE 10W-30/10W-40/5W-30
- Flush the engine with fresh water
- Add fuel stabiliserThe engine has fuel injection, so there is no carburettor to run dry. Follow the manufacturer's instructions.
- Change gear oilMilky oil means there is water in the gear housing.
- Lubricate according to the lubrication schedule
- Store the engine upright so that water drains out
Spring
- Check the gearcase oilMilky oil means there is water in the gear housing.
- Check the impellerReplace it if it is stiff or cracked.
- Check the propeller and anodes
- Check that cooling water comes out of the tell-tale hole
Engine oil
- Specification
- YAMALUBE 4 or four-stroke outboard oil, SAE 10W-30/10W-40/5W-30
- Volume
- 1 l
- Capacity including filter
- 1.1 l
Gear oil
- Specification
- Hypoid oil SAE 90 API GL-4
- Volume
- 0.37 l
Spark plugs
- Spark plugs
- NGK DPR6EB-9
- Spark plug gap
- 0.8 to 0.9 mm
Fuel
- Fuel system
- Fuel injection (EFI)
- Fuel
- Unleaded petrol, no oil mixing, four-stroke
- Minimum octane rating
- 90 RON
- Maximum ethanol
- 10 %
Runs rough, stalls or loses power
Electrics, alarms and fault codes
- SV · PDF · 2026
- EN · PDF · 2026
Exploded views & parts catalogs
Frequently asked questions about Yamaha F25
How much oil does the Yamaha F25 take?
Yamaha F25 takes about 1.1 litres of engine oil including the filter.
Where can I find the owner's manual for Yamaha F25?
Links to owner's manuals and workshop manuals are available under Manuals.
How many cylinders does Yamaha F25 have?
Yamaha F25 has 2 cylinders.
What fuel does the Yamaha F25 use?
Yamaha F25 runs on petrol.