Description
Key features
Horsepower-per-litre: an advanced powerhead design features a single overhead camshaft (sohc), yet with four valves per cylinder, for maximum power and efficiency. Total intake valve area is increased 17%, while the pistons and valves are up to 10% lighter (when compared to our t60 model), giving it substantially more horsepower-per-litre of engine displacement than competitive outboards, both four stroke and two stroke direct-injected. 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. Precise throttle control: 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.
Engine
Engine type: Four stroke, 4-cylinder
Displacement: 996cc (60.8 ci)
Bore & stroke: 65 x 75mm (2.56 x 2.95 in)
Rpm range: 5,300-6,300
Compression ratio: 9.4
Induction system: Sohc / 16 valve
Alternator output: 17 amps
Fuel delivery: Multi-point electronic fuel injection
Starting: Electric
Ignition: Tci microcomputer
Lubrication: Wet sump
Degree of trim/tilt: -4° through +16°/65° w/ptt
Exhaust: Through propeller. Water-cooled, labyrinth
Cooling: Raw water, thermostatic control
Gear shift: F/n/r
Gear ratio: 28/12 (2.33:1)
Fuel & lubrication
Recommended fuel: Unleaded gasoline (minimum pump octane 87)
Recommended oil: Yamalube 4-m fc-w 10w-30
Oil capacity: 2.1l (with filter)
Dimensions
Shaft length: 20″
Dry weight: 115kg (253lbs)
