2025 Yamaha Marine F70B Base

2025 Yamaha Marine F70B

Using advanced features and technology to make it extremely light, powerful and quiet the F70 is the ideal outboard for a myriad of lightweight boats and is available in three different colour options to find the style that matches you and your boat.

Features may include:

• Lightest weight in class: From the specially designed engine block to the two-piece upper case, every ounce of weight savings has been realized for maximum performance without sacrificing durability. Yamaha's new F70 is not only the lightest four stroke 70 horsepower outboard, it's even lighter than competitive two stroke direct-injected outboards.

• From the specially designed engine block to the two-piece upper case, every ounce of weight savings has been realized for maximum performance without sacrificing durability. Yamaha's new F70 is not only the lightest four stroke 70 horsepower outboard, it's even lighter than competitive two stroke direct-injected outboards.

• All air entering the engine block of Yamaha's new F70 four stroke is routed through a single throttle valve, to ensure the precise amount of air necessary for optimum power and fuel efficiency. It then enters each cylinder through individual long intake tracks, which are 'pulse tuned' to provide air at the precise volume and timing for maximum density and power.

• Four individual compact electronic fuel injectors deliver the exact amount of fuel needed for optimum performance and economy. Controlled by the Engine Control Module via input from an array of on-engine sensors, their location just above the intake valves enhances fuel atomization, resulting in more efficient combustion.

• The new F70 features a new outer cowling design with an intake air drain system, to easily and efficiently drain away any water that enters the cowling during normal engine operation. Incoming air is routed through a labyrinth of passages that help trap and drain water before it enters the engine's intake, for maximum reliability.

• Yamaha's F70 four stroke outboard utilizes a Long Span Mounting System, which uses large specially constructed rubber engine mounts placed as far apart vertically and horizontally as practically possible. Smooth and quiet operation, yet with strength and durability, is the result.

• All-new F70 outboards feature a large, on-engine water separating fuel filter with a water sensor. Used in conjunction with Yamaha's optional boat-mounted 10-Micron Water Separating Fuel Filter, it helps separate water and contaminants from the fuel before they can reach the outboard's other filters and fuel injectors.

• Yamaha's large anti-splash plate, standard on F70 models, helps keep water from splashing up between the leading edge of the outboard and the boat, resulting in a much dryer ride. Located on the front of the lower mid-section just above the lower unit, it excels in applications where the outboard is normally run deep in the water, such as pontoon boats.

• Engine exhaust is routed through a maze before exiting above the waterline through the idle exhaust relief outlet for unbelievably smooth and quiet operation.