Searching for a dependable outboard engine 20 hp that offers power without the bulk? The Yamaha F20SMHB is built for boaters who need reliable performance in a lightweight frame. Perfect for fishing boats, tenders, and small inflatables, this 20 HP 4-stroke outboard delivers smooth acceleration and fuel efficiency you can trust.

Engine Info & Specs

Not your typical portable outboard engine, the Yamaha F20SMHB features an manual start and a tiller handle. This all-new 432-cc 20-hp 4-stroke outboard engine is built on the same award-winning platform as Yamaha's renowned F25 outboard engine, and features the same SOHC in-line design and signature streamlined intake manifold.

While this design boasts exceptional power, it also makes the F20 one of the most fuel efficient outboard engine's in its class. Weighing less than 150 pounds, the F20 is ideal for lightweight marine vessels like aluminum boats, tenders, and inflatables.

Clean Burning Power - Yamaha's entire four-stroke line up meets emissions requirements in all 50 states.

Reliability & Durability - Wet Sump - A pressurized oil delivery system that incorporates a compact and durable oil pump to keep all of the moving parts of their Overhead Valve systems lubricated and running smoothly for maximum reliability. Whether you’re navigating tight inlets or cruising across the lake, this Yamaha 20 hp outboard provides responsive handling and stable power. Its lightweight build makes mounting and transport simple, while the 45° steering angle ensures excellent maneuverability in shallow or crowded waters.

Engine Type: SOHC, 2-cylinder design for smooth power delivery.

Weight: Only 126 lbs., making it one of the lightest 20 hp outboard engines available.

Ignition: CDI microcomputer ignition for reliable starts every time.

Alternator Output: 16 Amp at wide-open throttle, enough for essential onboard electronics.

Convenience & Control:

• Max Maneuverability - 45-degree steering angle enables exceptional maneuverability in every direction.
• Easy Engine Flushing - A Freshwater Flush Device allows you to flush the engine without running it, for added convenience and extended engine life.
• Portability & Storage - Incredible light weights, built-in resting pads and carry handles, an easy oil retention system and an optional folding tiller handle, allow for easy carrying and on-side storage without oil leakage or cowling scuffs.

Engine Type	2 cyl
Displacement	432cc
Bore x Stroke	65 x 65.1mm (2.554 x 2.558 in)
Prop Shaft Horsepower	20 hp @ 5500 rpm
Full Throttle RPM Range	5000 ~ 6000 rpm
Alternator Output at W.O.T.	16 Amp
Compression Ratio	9.3:1
Fuel Induction System	EFI
Weight*	126 lbs
Recommended Fuel	Octane 87
Recommended Engine Oil	YamaLubes® 4M (See owner's manual)
Recommended Fuel Filtration	Yamaha 10-Micron Fuel/Water Separating Filter (external)

Why Choose the Yamaha F20SMHB?

The Yamaha F20SMHB isn’t just another outboard engine 20 hp—it’s engineered for serious boaters who value portability and durability. Its fuel-injected design ensures crisp throttle response and impressive fuel economy, while the robust SOHC architecture means dependable performance season after season.

Maintaining your Yamaha F20SMHB is simple thanks to the Freshwater Flush Device, which helps protect the cooling system without running the engine. Built-in oil retention and side-rest pads make storage and transport stress-free, while Yamaha’s corrosion-resistant coatings add an extra layer of durability for saltwater conditions.

Frequently Asked Questions

How much does the Yamaha F20SMHB weigh?

Around 126 lbs., making it easy to transport and install.

Is the Yamaha F20 fuel-efficient?

Yes, the EFI system delivers outstanding fuel economy without sacrificing performance.

What boats pair best with a 20 HP Yamaha outboard engine?

Ideal for aluminum boats, small pontoons, inflatables, and tenders.

Ready to upgrade to a dependable outboard engine 20 hp? Order the Yamaha F20SMHB today and enjoy the perfect balance of power, portability, and legendary Yamaha reliability.