Description

Yamaha Outboards 40HP F40JEHA – Jet Drive Outboard

The Yamaha 40HP F40JEHA Jet Drive Outboard is a versatile, reliable, and high-performing engine designed specifically for boaters who navigate shallow waters, rocky rivers, and sandbars where conventional propeller-driven outboards simply cannot go. By replacing the traditional propeller with a jet pump, Yamaha has built a motor that allows safe and confident passage in areas filled with underwater obstacles, offering a level of freedom and flexibility that few outboards can match.

Engine & Design

At the heart of the F40JEHA lies a 747 cc, three-cylinder inline, SOHC four-stroke engine. This compact yet powerful engine is engineered to provide excellent low- to mid-range torque and quick acceleration. Its Electronic Fuel Injection (EFI) system ensures clean and efficient fuel delivery, giving the outboard consistent performance, improved fuel economy, and smooth operation across a wide range of conditions.

The motor delivers 40 horsepower at the crankshaft, with an effective jet thrust equivalent to around 30 horsepower at 5,500 RPM. This makes it perfectly suited for small- to medium-sized boats that demand strong, reliable performance in shallow or obstacle-filled waterways.

Key Features

• Jet Drive System – Eliminates the external propeller and lower unit, allowing the boat to safely traverse shallow water, sandbars, rocky bottoms, and rapids.

• Lightweight Build – Weighs approximately 219–227 lbs, making it easy to handle and efficient for smaller vessels.

• Durability & Protection – Built with Yamaha’s advanced anti-corrosion coating, YDC-30 alloy, and Phaze Five paint system for long-lasting protection in both freshwater and saltwater.

• Freshwater Flush Device – Simplifies engine cleaning and maintenance after use, extending engine life.

• Nitro Assist Tilt System – Allows effortless tilting of the outboard for shallow water operation or trailering.

• High-Output Alternator – Produces about 16 amps at wide open throttle, delivering reliable power for electronics and accessories.

• User-Friendly Controls – Comes with a tiller handle for precise maneuvering and responsive handling.

• Compact SOHC Design – Reduces weight while maintaining power and efficiency.

Specifications

• Engine Type: Inline 3-cylinder, SOHC, 4-stroke

• Displacement: 747 cc

• Horsepower: 40 HP (approx. 30 HP jet thrust)

• RPM Range: 5,000–6,000 RPM

• Fuel System: EFI (Electronic Fuel Injection)

• Ignition: Microcomputer CDI

• Compression Ratio: 9.4:1

• Alternator Output: 16 Amps (W.O.T.)

• Shaft Length: 20 in.

• Weight: 219–227 lbs

• Fuel Type: Regular unleaded gasoline (87 octane)

• Starting System: Electric

• Steering: Tiller handle

• Tilt System: Nitro Assist Tilt

• Warranty: Typically 2–3 years depending on supplier

Performance Benefits

1. Shallow Water Mastery – With no exposed propeller or gearcase, this outboard lets you go where others cannot, tackling rivers, streams, and coastal flats.

2. Responsive Power – Designed with long intake tracks for smoother airflow, providing better acceleration and strong mid-range torque.

3. Fuel Efficiency – Advanced EFI system ensures reduced fuel consumption while delivering consistent power.

4. Low Maintenance – With features like a freshwater flush system and durable anti-corrosion technology, the F40JEHA is built to withstand tough environments with minimal upkeep.

5. Lightweight & Portable – Easy to transport, mount, and handle, making it a practical choice for versatile boat setups.

Best Applications

The Yamaha F40JEHA Jet Drive is ideal for:

• Hunters & Anglers navigating shallow marshes, rivers, and backwaters.

• Outdoor Adventurers exploring sandbars, rocky riverbeds, or coastal flats.

• Rescue and Utility Boats requiring dependable performance in unpredictable environments.

• Small Workboats or Tenders that need reliable shallow-water operation.

Conclusion

The Yamaha 40HP F40JEHA Jet Drive Outboard is a rugged, dependable, and highly efficient engine for boaters who demand reliable performance in shallow and obstacle-filled waters. Combining Yamaha’s advanced engineering, lightweight design, fuel-efficient EFI system, and superior corrosion protection, this outboard offers exceptional value for professionals and recreational boaters alike.

Whether for fishing, hunting, or exploring, the F40JEHA gives you the confidence to go where propeller-driven engines cannot—making it a trusted companion for shallow-water adventures.