Yamaha 20HP Outboard Engine - F20

Yamaha 20HP Outboard Engine - F20

The 20HP Outboard Yamaha F20, is a versatile, portable, twin-cylinder four-stroke motor known for its high power-to-weight ratio, fuel efficiency, and smooth performance. It incorporates advanced features, such as Electronic Fuel Injection (EFI), typically found on larger engines.

• GMHS - Manual Start, Tiller Handle. Includes Propeller (short shaft)
• GMHL - Manual Start, Tiller Handle. Includes Propeller (long shaft)
• GWHS - Manual & Electric Start, Tiller Handle. Includes Propeller (short shaft)
• GWHL - Manual & Electric Start, Tiller Handle. Includes Propeller (long shaft)
• GES - Electric Start, Remote Control (short shaft)
• GEL - Electric Start, Remote Control (long shaft)
• GEPS - Electric Start, Remote Control, Power Tilt (short shaft)
• GEPL - Electric Start, Remote Control, Power Tilt (long shaft)

Yamaha 20HP Outboard Engine Key Features

• Electronic Fuel Injection (EFI): The modern F20 models offer both battery and battery-less EFI options, ensuring easy, reliable starting in hot or cold conditions, enhanced fuel economy, and smooth running.
• High-Output Alternator: The engine features a 16-amp alternator (on 432cc models), providing ample power for battery charging and running various electronic accessories, even after prolonged idling.
• Variable Trolling Speed (VTS): This feature, standard on all F20 models, allows the operator to adjust the trolling speed in 50 rpm increments from 750 to 1050 rpm for precise lure presentation.
• Portability and Storage: Designed for easy transport, the engine has built-in resting pads and large, comfortable carry handles. The tiller handle on some models can also fold back to make the unit more compact for storage.
• Durability and Corrosion Resistance: Yamaha's unique YDC-30 aluminium alloy and a five-stage anti-corrosion paint system, along with a freshwater flushing system, enhance the engine's durability and protect it from the elements.
• Control Options: The F20 is available with either a multi-function tiller handle or remote control options, and features manual tilt or power tilt systems depending on the specific model configuration

Yamaha 20HP Outboard Engine FAQs

Does it require a battery?
No, the Yamaha F20 features a battery-less EFI system, which allows for easy manual starting (often one pull) in any condition (hot or cold) without the need for a battery. However, if you choose an electric-start model (E or EP), a battery will be required for that function, though the manual start rope is retained as a backup.

What is the difference between the F20 and the F25?
The F20 shares the same large 432cc powerhead as the award-winning Yamaha F25, but it is detuned with a different camshaft and engine calibration to produce less horsepower. This means the F20 has a large displacement for its class, which contributes to strong bottom-end power and a smooth ride.

How do I choose the right shaft length?
Measure your boat's transom height from the top to the bottom in the middle of the stern. A short shaft (15") is for standard transoms, and a long shaft (20") is typically for larger or deep-V hull boats. The ideal shaft length should be about two inches longer than the transom height for optimal performance.

What maintenance is required?
Regular maintenance is crucial for reliability. Key tasks include:

• • • Using fresh, quality fuel and a fuel stabilizer.
    • Regularly checking and replacing fuel filters.
    • Inspecting and replacing spark plugs.
    • Checking the water pump impeller every 3-5 years to prevent overheating issues.
    • Ensuring proper winterization if stored in freezing temperatures.

What are the control options?
The Yamaha F20 comes with options for a multi-function tiller handle or remote controls. The tiller handle options include single-lever steering friction adjustment and the ability to control the variable trolling speed.

Can I troll at very slow speeds?
Yes, the F20 offers a Variable Trolling Speed (VTS®) feature (if equipped/activated via an accessory switch, tiller handle button, or Command Link display) which allows you to adjust the trolling speed from 750 to 1050 rpm in precise 50 rpm increments.