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YAMAHA
 
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F25 - F20 - F15
Small-engine convenience. Big-engine performance.

If you’re wanting easy handling and control, strong performance, smoothness, fuel economy, reduced exhaust emissions, and amazing versatility, simply choose one of these sleek, stylish twin-cylinder 4-strokes. As it’s a Yamaha, you’ll also enjoy advantages normally found only on larger engines, such as computer-controlled ignition, special light-load starting system, water-cooled fuel pump and large-volume silencer.
Want even more? Single-lever steering friction adjustment, a high-output alternator and the electric Power Tilt system (Power Trim and Tilt on the F25) are other notable benefits. All in all, the perfect choice for commercial, professional or leisure use.

The F25, F20 and F15. The lightest, most compact engines in their class.
 
Highlights:
- PrimeStart™ chokeless system, as easy as starting your car
- CDI/TCI ignition system for easy starting and ultimate reliability
- High-output alternator provides extra starting power, even after low rpm idling
- Manual and electric start options to suit your type of boating
- ‘Start-in-gear’ prevention, avoids accidental starting when in gear
- Yamaha’s Ideal Anti-corrosion Protection, looks after your engine - for life

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Brochure

Parts Manual

Service Manual

Owners Manual

What year is my engine?

GENERAL   SYSTEMS  
    Alternator: 12V - 6A (DM), 12V - 13A (DE, DET)
Manufacturer: YAMAHA Cooling:
Make: F25D Ignition: CDI/Computer
Year: Starting: Manual (DM), Electric (DE, DET)
Engine Type: 25 HP 4-STROKE Exhaust:
Horsepower: 25 Trim: Manual (DM, DE) (8, 12, 16, 20 and 24 degrees), Power Trim & Tilt (DET)
Displacement: 30.39/498(in/cc) Fuel Induction: 1 carb.
Bore/Stroke: 2.56x2.95/65x75(in/mm) Lubrication: Wet sump
Cylinders: 2 (with balancer) Steering
RPM: 5000-6000    
Weight: 170/77(lbs/kg) PRICING These prices are the "Manufacturer Suggested Retail Prices" (MSRP). These are just for comparison.
Gear Ratio: 2.08:1 US: dollars
Shaft lenght: (in/mm) UK: 2.929 - 3.989 pounds
Gears: F N R Netherlands: euros
    France: euros
    Australia: dollars
 

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