Yamaha F25

• 2 cyl
• 432 cm³
• 25 hp
• Petrol

Save my engine

Troubleshooting

Starting problems

• Boat engine won't start after the winter
• Boat engine won't start when warm

Runs rough, stalls or loses power

• Boat engine dies at idle or when shifted into gear
• Boat engine hesitates or dies on acceleration
• Boat engine stops after a while

Smoke and exhaust

• The boat engine smokes blue – burning oil
• White smoke from the boat engine exhaust

Oil, water and fuel

• Petrol smell in the boat – fuel leaking from the engine
• Water in the fuel or tank of the boat engine
• Water in the engine oil – the oil is grey or milky

Electrics, alarms and fault codes

• Battery not charging – charge warning light is on
• The alarm is sounding – what do the warning lights mean?
• Oil pressure alarm on the boat engine – low oil pressure

Drive, gearbox and trim

• Trim not working – the drive won't go up or down
• Gear will not engage or jumps out

Outboard

• The outboard only runs on choke or dies at idle
• Outboard not cooling – no tell-tale stream
• The outboard won't start
• The outboard loses power or won't reach full revs
• Water in the outboard's gearcase oil

Manuals

• Official

  Owner's Manual (F(T)25) ↗ (external link)
  SV · PDF · 2026
• Official

  Owner's Manual (F(T)25) ↗ (external link)
  EN · PDF · 2026

Exploded views & parts catalogs

• Official

  Yamaha Motor Europe: parts catalog ↗ (external link)

  Genuine parts with exploded diagrams, search by model.

  SHOP

Listings for Yamaha F25

Watch listings for my enginePost a free listing

Search used:

Blocket ↗Tradera ↗Facebook Marketplace ↗

Owners' experiences

No experiences yet. Do you own one? Tell us how it works.

Write about your experience

Related models

Yamaha F2.5

Outboard

1 cyl · 72 cm³ · 2.5 hp · Petrol

→

Yamaha F4 / F5 / F6

Outboard

1 cyl · 139 cm³ · 4–6 hp · Petrol

→

Yamaha F8 / F9.9

Outboard

2 cyl · 212 cm³ (F(T)9.9) · 8–9.9 hp · Petrol

→

Yamaha F15 / F20

Outboard

2 cyl · 362 cm³ · 15–20 hp · Petrol

→

Service guides

Replacing the impeller →Winterize a boat engine →

Frequently asked questions about Yamaha F25

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.

Sources

• Yamaha Motor Europe: Owner's manual (F(T)25) (PDF) ↗ (external link)
• Yamaha Motor Europe: Owner's Manual (F(T)25) (PDF, specifications) ↗ (external link)
• Yamaha Motor Europe: manual library (Outboard Engines) ↗ (external link)
• Yamaha Motor Europe: owner's manuals (search by model) ↗ (external link)
• Yamaha Outboards: model overview and ID label location (PDF) ↗ (external link)
• Wikipedia: Yamaha Motor Company (en) ↗ (external link)