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Yamaha F70 FourStrake User Manual

Yamaha F70 FourStrake
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Yamaha proudly announces a new addition to its mid-range four stroke stable; the F70. Using advanced features and
technology to make it extremely light yet very powerful, it is the ideal outboard for a myriad of lightweight fi shing,
family, and pontoon boats.
Featuring the lightest weight and highest horsepower-per-liter-of-displacement in the 70hp class, the Yamaha F70
takes advantage of the leading edge of technology while maintaining the fuel-effi cient, smooth, and quiet operation
Yamaha four strokes are known for. And it has benefi ts like Yamahas available Multifunction Tiller Handle or our
Command Link® System, which let you harness its Variable Trolling RPM capability.
The new Yamaha F70. Big-league technology in a very light weight,
fuel effi cient outboard.
Best-in-Class Horsepower-per-Liter – advanced 16-valve, single
overhead camshaft (SOHC), in-line 4 cylinder engine design.
Lightest Weight In Class – at 257 pounds, it’s signifi cantly lighter than
all four stroke and two stroke outboards of similar horsepower.*
Remarkably Responsive – a single throttle valve works in concert
with a tuned, long track intake system and high-ratio gearcase.
Outstanding Fuel Effi ciency – Yamaha’s Multi-point Electronic Fuel
Injection System and dependable ECM microcomputer engine control.
Proven Reliability – designed, built, and extensively tested to Yamaha’s
stringent standards for reliability.
Smooth, Dependable Mechanical Shifting and Throttle – works with all
Yamaha binnacle and most side-mount mechanical control boxes.
Operator Convenience –compatible with conventional analog or optional
Command Link gauges, for even more up-to-the-instant information.
Quiet, Smooth Operation – Yamahas labyrinth exhaust and Long-Span
Mounting System combines with a stylish yet functional exterior.
Ease of Service and Lasting Value computerized Yamaha Diagnostic
System (YDIS), Enhanced Ultimate Corrosion Protection System (UCP-II™),
and water-draining air intake cowling.
Peace of Mind – advanced engine warning and protection system and
standard three year pleasure or government limited warranty.
HOT SHEET
EFFECTIVE NOVEMBER 1, 2009
AVAILABLE MODEL: F70LA
YAMAHA MARINE
F70
Mid-Range
* Published weight
Consult appropriate Yamaha rigging information and Yamaha Rigging Sheet (YMBS) for complete rigging
compatibility information and requirements for particular confi gurations. All rigging items sold separately.
Reviewed and/or revised 7/1/10
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Yamaha F70 FourStrake Specifications

Engine Specifications IconEngine Specifications
displacement996 cc
bore x stroke65 x 75 mm
compression ratio9.4:1
Power IconPower
full throttle RPM range5300 ~ 6300
horsepower rating70 hp at 5800 rpm
alternator output17 Amp
Fuel and Lubrication IconFuel and Lubrication
recommended fuelRegular Unleaded
ethanol blend limit10% Maximum
engine oil capacity2.1 L with filter
Weight and Dimensions IconWeight and Dimensions
degree of trim-4° through +16°
degree of tilt65°
weight117 kg

Summary

Yamaha F70 Hot Sheet Overview

Best-in-Class Horsepower-per-Liter

Features an advanced 16-valve, SOHC, 4-cylinder engine design for maximum power and efficiency.

Lightest Weight In Class

At 257 lbs, it is significantly lighter than comparable 4-stroke and 2-stroke outboards.

Remarkably Responsive

Single throttle valve with tuned intake and high-ratio gearcase for quick throttle response.

Outstanding Fuel Efficiency

Utilizes Multi-point Electronic Fuel Injection and ECM for optimal fuel economy.

Proven Reliability

Designed, built, and tested to Yamaha's stringent standards for long-term reliability.

Smooth, Dependable Mechanical Shifting and Throttle

Works with all Yamaha binnacle and most side-mount mechanical control boxes.

Operator Convenience

Compatible with analog or optional Command Link gauges for enhanced operational information.

Quiet, Smooth Operation

Features labyrinth exhaust and Long-Span Mounting System for quiet and smooth running.

Ease of Service and Lasting Value

Includes Yamaha Diagnostic System (YDIS) and enhanced corrosion protection.

Peace of Mind

Offers advanced engine warning system and a standard three-year limited warranty.

F70 Features and Compatibility

Model Code Chart and Dimensions

Explains the model code structure and provides key engine dimensions in millimeters and inches.

Rigging Options Compatibility

Details compatibility for gauges, controls, key switches, and lanyards for various systems.

Key Switches and Lanyards

Lists available key switches and lanyards and their compatibility status with the F70.

Controls and Miscellaneous Options

Outlines compatibility for different controls and lists miscellaneous features like Command Link.

F70 Power and Performance Details

Horsepower-Per-Liter Comparison

Compares the F70's horsepower-per-liter output against competitors in four-stroke and two-stroke classes.

Lightest Weight In Class Comparison

Compares the F70's weight against competitors, highlighting its status as the lightest four-stroke 70hp outboard.

F70 Performance Technologies

Precise Throttle Control

Details how the single throttle valve and tuned intake tracks ensure precise air delivery for power.

Maximum Power and Efficiency

Explains how individual electronic fuel injectors and on-engine sensors optimize fuel delivery.

Hole Shot and Acceleration

Highlights features like advanced ignition timing and a 2.33:1 gear ratio for strong acceleration.

More Power, Cleaner Emissions

Describes Vapor Reduction and Burning Systems that maximize fuel use and minimize emissions.

F70 Reliability and Durability Features

Protection From the Elements

Features a new cowling design with an intake air drain system to protect the engine from water.

Quiet, Yet Strong Operation

Utilizes a Long Span Mounting System with rubber mounts for smooth, quiet, and durable operation.

Large Water Separator

Includes an on-engine fuel/water separator with sensor to protect fuel injectors and filters.

Dryer Operation

Features a large anti-splash plate to reduce water spray for a drier ride, especially in certain applications.

F70 Convenience and Control Features

Precise Trolling Control

Allows adjustment of trolling speed from 620-900 RPM in 50-RPM increments via Command Link.

More Information Display

Optional Command Link gauges provide extensive information for efficient and effective operation.

Tiller Handle Convenience

Award-winning optional Multifunction Tiller Handle offers ergonomic design and convenient controls.

Smooth and Quiet Engine Exhaust

Engine exhaust is routed through a maze before exiting via an idle exhaust relief outlet for quietness.

F70 Specifications and Limited Warranty

Engine and Drive Specifications

Details engine type, displacement, bore/stroke, RPM range, compression, and drive gear ratio.

Fuel and Lubrication Requirements

Specifies recommended fuel type, filtration, ethanol limits, and oil capacity.

Key Features Summary

Lists core features across Power/Performance, Reliability/Durability, and Convenience/Control categories.

Limited Warranty Information

Outlines warranty periods for Pleasure, Government, and Commercial usage.

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