Yamaha performs a standard pre-delivery inspection prior to shipment, ensuring consistent quality across all of their outboard engine models. Once the inspection is completed, engine fluids are drained and shipped along with the F4SMHA Yamaha outboard. engines for the owner to refill before operation.

Engine Info & Specs

Weighing in at only 59 pounds, and featuring a streamlined overhead-valve and one-cylinder design, the F4SMHA is one of Yamaha's smallest portables yet. This outboard engine's light weight combined with built-in carrying handles, resting pads and an oil-leak prevention system for on-side storage capability create true portability. Add to that the engines efficiency, performance and reliability and this pint-sized powerhouse is perfect for all sorts of light duty, like hopping to the cuddy on a tender. Wherever the day takes you, you can take along a little extra power with the F2.5 Yamaha Portable.

Clean Burning Power - Like all other Yamaha 4-stroke outboard engines, the F4SMHA 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.

Convenience & Control:

• Easy Storage - Yamaha's signature Easy Storage OIl Retention System prevents leaks and makes on-side storage easy.
• Comfortable Control - 360-degree steering with a dynamically balanced and dampened twist-grip throttle for simple and intuitive maneuverability and comfort.
• Portability & Storage - Built-in front and rear handles make this lightweight easy to carry. Resting pads and an easy oil retention system allow for convenient on-side storage without cowling scuffs or oil leakage.

Engine Type	1 cyl
Displacement	139cc
Bore x Stroke	62 x 46 mm (2.44 x 1.81 in)
Prop Shaft Horsepower	4hp at 4500 rpm
Full Throttle RPM Range	4000 ~ 5000
Alternator Output at W.O.T.	6 Amp
Compression Ratio	8.9:1
Fuel Induction System	Carb
Weight*	59 lbs
Recommended Fuel	Octane 87
Recommended Engine Oil	YamaLubes® 4M (See owner's manual)
Recommended Fuel Filtration	N/A