Yamaha F4LMHA 4HP – FourStroke 20-Inch Shaft

Yamaha F4LMHA 4HP Portable Long Shaft

The Yamaha F4LMHA 4HP is a lightweight and portable 4-stroke outboard motor featuring a reliable 1-cylinder 139cc OHV engine architecture. This compact power plant is specifically designed for small tenders, canoes, and as a secondary kicker for larger vessels, weighing only 60 lbs for easy manual transport. Its 20-inch long shaft configuration provides advanced outboard engine technology with consistent propeller immersion for vessels with higher transoms requiring dependable low-speed thrust.

Technical Specifications of Yamaha F4LMHA

• Efficient 1-cylinder 139cc OHV engine delivers 4 horsepower for small craft propulsion.
• Lightweight 28 kg design with 20-inch shaft allows for easy mounting and removal from the transom.
• Integrated fuel tank and external tank connection capability provide versatile fueling options for long trips.
• Tiller handle with 360-degree steering provides maneuverability in tight aquatic areas.
• Manual pull start and CDI ignition helps support high reliability and simple maintenance for boaters.
• Water-cooled thermostatic system manages engine temperature for consistent performance in all climates.
• Protected by Yamaha’s legendary manufacturing standards and a 3-year limited factory warranty.

Portable OHV Power

The F4LMHA utilizes a single-cylinder OHV configuration to provide reliable and efficient power for displacement hulls. This mechanical design is focused on simplicity and durability, ensuring the engine remains easy to start and maintain for recreational users. Small boat owners enjoy quiet operation and reduced exhaust emissions compared to traditional two-stroke models.

Versatile Long Shaft

The 20-inch shaft length is perfectly suited for boats with a 20-inch transom, such as small aluminum sailboats or high-side utility skiffs. This length helps support the propeller remains properly submerged to prevent aeration and maintain steady forward or reverse thrust. Captains gain improved tracking and steering authority when navigating calm inland lakes or protected coastal waters.

360-Degree Steering

This 4HP outboard features a unique steering system that allows for 360-degree rotation of the motor. This provides agility when docking or maneuvering in technical river sections, as the engine can provide full thrust in any direction without shifting gears.Maintenance note: Follow the manufacturer’s service procedures and lubrication specifications for the engine and gearcase.