Yamaha Outboards 70HP 4 stroke Outboards Engine

Yamaha Outboards 70HP 4 stroke Outboards Engine

Horsepower-per-Litre: The advanced powerhead design of the Yamaha F70 features a Single Overhead Camshaft (SOHC) with four valves per cylinder, optimizing power and efficiency. The intake valve area is increased by 17%, and the pistons and valves are up to 10% lighter compared to the T60 model. This results in significantly higher horsepower-per-litre of engine displacement than other outboards, whether four-stroke or two-stroke direct-injected.

Lightest Weight in Class: Designed with a specially engineered engine block and a two-piece upper case, the Yamaha F70 maximizes performance without compromising durability. It stands out as the lightest four-stroke 70 horsepower outboard, even lighter than some two-stroke direct-injected competitors.

Precise Throttle Control: The Yamaha F70’s four-stroke engine routes all incoming air through a single throttle valve, ensuring precise air intake for optimal power and fuel efficiency. Each cylinder receives air through individual long intake tracks, which are pulse-tuned for maximum density and power at the exact volume and timing needed.

Yamaha Outboards 70HP

Specifications:

• 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: 9.4:1
• Induction System: SOHC / 16 valves
• Alternator Output: 17 Amps
• Fuel Delivery: Multi-point electronic fuel injection
• Starting: Electric
• Ignition: TCI Microcomputer
• Lubrication: Wet sump
• Trim/Tilt Range: -4° through 16°/65° with PTT
• Exhaust: Through propeller, water-cooled, labyrinth design
• Cooling: Raw water with thermostatic control
• Gear Shift: Forward/Neutral/Reverse (F/N/R)
• Gear Ratio: 28/12 (2.33:1)

Fuel & Lubrication:

• Recommended Fuel: Unleaded gasoline (minimum 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)

Yamaha Outboards 70HP

The Yamaha 70HP Outboard is a lightweight, four-stroke engine offering exceptional power and fuel efficiency. Featuring a 996cc displacement, advanced SOHC design, and precise throttle control, it delivers smooth, reliable performance. Ideal for a wide range of boating needs, it’s the lightest in its class, ensuring optimal speed and maneuverability on the water.