New Yamaha F70 70HP 4 Stroke Long Shaft Outboard Engine

New Yamaha F70 70HP 4 Stroke Long Shaft Outboard Engine

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.

SPECS :

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)

Key Performance Specifications
According to manufacturer and dealer technical sheets from Yamaha Marine and Farnley’s Yamaha:

Engine Type: In-line 4-cylinder, 16-Valve SOHC.
Displacement: 996cc (60.8 cu in).
Output: 70 HP at 5,800 RPM.
Operating Range: 5,300 – 6,300 RPM.
Shaft Length: 20 inches (Long Shaft).
Weight: Approximately 253 lbs (114 kg).
Gear Ratio: 2.33:1, designed for improved hole shot and acceleration.
Alternator: 17-amp output (some regions list 15-amp).