YAMAHA IN-LINE 4 150 HP OUTBOARD MOTOR

The Yamaha In-Line 4 150 HP Outboard Motor stands as one of Yamaha’s most respected mid-range power units—recognized globally for its balance of strength, efficiency, and reliability. Designed with Yamaha’s signature marine engineering precision, this 4-stroke motor delivers smooth acceleration, quiet performance, and outstanding fuel economy. It’s a trusted choice for both recreational boaters and commercial operators who demand lasting power and minimal maintenance.

Built on Yamaha’s advanced 2.7-liter In-Line 4-cylinder platform, the 150 HP model combines lightweight design with serious propulsion capability. It features a Dual Overhead Camshaft (DOHC) for superior airflow and combustion efficiency, delivering instant throttle response and dependable torque across all speeds.

Power, Efficiency, and Control

The Yamaha In-Line 4 150 HP is engineered for boaters who value smooth, efficient power without compromise. Its Electronic Fuel Injection (EFI) system optimizes fuel use, ensuring every drop contributes to performance. This intelligent fuel management system minimizes emissions while maximizing output, making it both eco-friendly and cost-efficient.

The lightweight construction enhances balance and handling, improving acceleration and top-end speed. With a full-throttle range of 5000–6000 RPM, the motor achieves an excellent power-to-weight ratio ideal for medium-sized boats, fishing vessels, and family cruisers.

Durability and Marine Protection

Yamaha’s Phaze Five™ anti-corrosion system provides advanced protection in both saltwater and freshwater conditions. Each component, from the powerhead to the propeller shaft, is coated to withstand marine exposure. The result is a long-lasting outboard motor designed for years of dependable service.

The cooling system’s water passages are treated for enhanced corrosion resistance, and the stainless-steel drive shafts and fasteners ensure strength and longevity.

Ease of Use and Maintenance

Routine maintenance is simplified through easy-access service points, a freshwater flushing system, and Yamaha’s self-draining design. Operators can easily check oil levels and perform routine service without special tools.

For optimal performance, Yamaha recommends oil changes every 100 hours or once a year, along with regular inspections of the propeller and fuel filters.

Safety and Responsible Operation

This model includes built-in safety alerts for low oil pressure, overheat conditions, and engine malfunction. Yamaha’s start-in-gear protection system prevents accidental engine engagement, and the emergency stop (kill switch) provides an additional layer of safety for the operator.

Key Features and Benefits

• Advanced 2.7L DOHC 4-cylinder engine

• EFI for precision fuel management

• Lightweight and fuel-efficient design

• Low noise and vibration for comfort

• Corrosion-resistant construction for marine durability

• Easy maintenance access and water flushing system

• Compatible with a wide range of boats and control systems

Applications

The Yamaha 150 HP In-Line 4 is ideal for:

• Recreational boating – perfect balance of power and efficiency

• Fishing operations – reliable performance for long days offshore

• Commercial use – durability for continuous operation

• Leisure cruising – quiet and smooth for comfortable rides

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