Yamaha F90XB 90HP EFI 4-Stroke 25″ Shaft Outboard Motor

Yamaha 90HP F90XB EFI 4-Stroke 25in Shaft

The Yamaha 90HP F90XB is a high-efficiency 1.8L in-line four-cylinder outboard featuring a 25-inch shaft, designed to provide robust torque for mid-sized coastal fishing boats and utility hulls with taller transoms. Utilizing a Single Overhead Camshaft (SOHC) architecture with four valves per cylinder, this 1832cc powerhead emphasizes torque density and a refined mechanical soul, delivering a smooth power band and exceptional reliability for long-range excursions. Its lightweight design ensures that boats remain balanced while benefiting from the increased displacement that characterizes Yamaha’s modern mid-range lineup.

Focused on superior operational efficiency, the F90XB utilizes Multi-Point Precision EFI to ensure reliable cold-weather starting and optimal fuel management across all RPM ranges. The chassis is protected by Yamaha’s proprietary multi-layered anti-corrosion system and specialized marine-grade alloys to safeguard against galvanic wear in high-salinity environments. Maintenance is made effortless by the front-mounted freshwater flush port and easy-access internal service points. This model includes a stable 35-amp alternator, providing a reliable charging system for navigational electronics, fish finders, and essential shipboard safety gear.

Key Features of Yamaha F90XB

• 1832cc 4-Cylinder SOHC 16-Valve.
• 90 Horsepower Prop Shaft Rating.
• 25-Inch Shaft 362 lbs Weight.
• Multi-Point Precision Fuel Injection (EFI).
• Mechanical Remote Control Compatibility.
• 35 Amp Total Output Alternator.
• 2.15:1 Ratio Standard Gearcase.