• Model: 15HP Models
  • Manufactured by: Yamaha
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Yamaha 9.9HP and 15HP 2-Stroke Outboard Motor Technical Overview

The Yamaha 9.9HP and 15HP 2-stroke outboard motors are reliable and powerful engines designed for a wide range of boating applications. These motors are known for their durability, fuel efficiency, and ease of operation, making them a popular choice for both recreational and commercial boaters.

Engine Design and Performance

Both the 9.9HP and 15HP motors feature a 2-cylinder, 2-stroke engine design that delivers impressive power and torque. The 9.9HP model produces 9.9 horsepower at 5500 RPM, while the 15HP model produces 15 horsepower at 5500 RPM. The engines are equipped with a carburettor and a magneto ignition system, ensuring reliable starting and smooth operation.

Cooling System

The Yamaha 9.9HP and 15HP outboard motors utilize a water-cooled cooling system to maintain optimal operating temperatures. Water is drawn from the surrounding water body through an intake hose and circulated through the engine's water jackets. The water absorbs heat from the engine and exits through the exhaust system.

Fuel System

The fuel system consists of a fuel tank, fuel line, and carburettor. The fuel tank is located on the exterior of the motor and has a capacity of 2.5 gallons. The fuel line connects the fuel tank to the carburettor, which mixes the fuel with air and delivers it to the engine's cylinders.

Electrical System

The electrical system provides power for the engine's ignition, lighting, and other electrical components. The system consists of a battery, starter motor, alternator, and voltage regulator. The battery provides power to the starter motor, which cranks the engine to start it. The alternator generates electricity to charge the battery and power the electrical components while the engine is running.

Gearcase and Propeller

The gearcase houses the gears and propeller shaft. The gears allow the motor to be shifted into forward, neutral, and reverse. The propeller is mounted on the propeller shaft and provides thrust to propel the boat. The Yamaha 9.9HP and 15HP outboard motors are available with a variety of propeller options to suit different boat types and applications.

Remote Control and Steering

The Yamaha 9.9HP and 15HP outboard motors can be controlled remotely from the helm using a control box and steering wheel. The control box allows the operator to shift gears, adjust the throttle, and stop the engine. The steering wheel connects to the motor's steering linkage, allowing the operator to steer the boat.

Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992 Workshop Service Manual PDF.

Manual PDF covers the repair and overhaul of Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992 cars and assumes that the technician is fully conversant with general automobile practices. The repair procedures outlined in this manual emphasize the special aspects of the product. This will enable you to build and maintain a reputation of quality service.
The PDF manual includes instructions on components manufactured for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992. For repairs of proprietary components the instructions of the respective component manufacturers are included in this manual. The purpose behind incorporating these instructions in this manual is to enable technicians to understand their functions properly and thus judge the performance of the car as a whole.

We have endeavored to ensure the accuracy of the information in this PDF manual. This is a complete Service Manual contains all necessary instructions needed for any repair your Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992 may require.
SERVICE MANUAL for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992 contains information such as:
Tune ups for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Maintenance for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Removal & install procedures for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Assemblies & disassemblies for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Fuel system for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Ignition for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Lubrication system for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Exhaust for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Electrical system for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.

Body for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Or more extensive repair involving ENGINE and TRANSMISSION disassembly for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
And MUCH MORE!!!

The manual provides the most reliable information.
The aim of this manual is to help you get the best value from your Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.

This manual includes many of the specifications and procedures that were available in an authorized Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992 dealer service department.

It provides information and procedures for routine maintenance and servicing. It offers diagnostic and repair procedures to follow when trouble occurs.

For many simpler jobs, doing it yourself may be quicker than arranging an appointment to get the Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992 into a dealer and making the trips to leave it and pick it up.
A lot of money can be saved by avoiding the expense the shop must pass on to you to cover its labour and overhead costs.
For those intending to do maintenance and repair on their Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992, it is essential that safety equipment be used and safety precautions obseved when working on the Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992. This includes a torque wrench to ensure that fasteners are tightened in accordance with specifications.
In some cases, the text refers to special tools that are recommended or required to accomplish adjustments or repairs. These tools are often identified by their Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992 special tool number and illustrated.

The Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992 owner will find that owning and referring to this manual will make it possible to be better informed and to more knowledgeably repairs like a professional automotive technician.

Specification:
This is a PDF FORM NOT A HARD COPY!!!
FAST and FREE ELECTRONIC DELIVERY via Email!!!
Language: English.
Printable: Yes.
File Format: PDF.




GENERAL TAGS FOR WSMBEST WORKSHOP SERVICE MANUALS:

General Information for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Maintenance for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Lubrication for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Heating for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Ventilatin for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Air Conditioning for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Suspensionfor Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Front Suspension for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Rear Suspension for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Wheel for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Tire System for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Differential for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Driveline for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Drive Shaft for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Transfer Case for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Brakes for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Engine for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Engine Mechanical for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Engine Cooling for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Engine Fuel for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Engine Electrical for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Ignition System for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Starting for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Charging System for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Emissions for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Engine Exhaust for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Engine Lubrication for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Engine Speed Control System for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Clutch for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Cooling for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Electronic Control Modules for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Engine Systems for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Heated Systems for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Horn for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Ignition Control for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Instrument Cluster for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Lamps for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Power Systems for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Restraints for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Speed Control for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Transmission for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Exhaust System for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Body Structure for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Seats for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Security and Locks for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Air Bag System for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Exterior Trim for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Interior Trim for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Frame for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Bumpers for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Fuel System for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Steering for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Transmission and Transfer Case for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Tires for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Wheels for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Body for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Heating for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Air Conditioning for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Emissions Control for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Engine Removal for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Engine Installation for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Final Drive for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Electrical System for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.


GENERAL MAINTENANCE TAGS FOR WSMBEST WORKSHOP SERVICE MANUALS:

Air cleaner element renewal for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Air cleaner temperature control check for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Auxiliary drivebelt check for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Battery electrolyte level check for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Battery terminal check for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Brake hydraulic fluid renewal for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Brake hydraulic system seal and hose renewal for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Brake pipe and hose check for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Choke adjustment check for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Contact breaker point renewal and distributor lubrication for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Crankcase ventilation system check for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Emission control filter element renewal for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Engine coolant renewal for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Engine idle speed check for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Engine oil and filter renewal for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Engine valve clearance check - OHV engines for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Exhaust system check for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Fluid leak check for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Fluid level checks for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Front and rear brake pad/shoe check for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Front wheel alignment check for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Gearbox oil level check for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Handbrake check for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Hinge and lock check and lubrication for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
HT lead, distributor cap for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
ignition circuit check for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Ignition timing for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
contact breaker gap (dwell angle) check for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Intensive maintenance for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Mixture adjustment check for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Road test for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Roadwheel security check for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Seat belt check for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Spark plug check for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Spark plug renewal for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Steering and suspension security check for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Throttle damper operation check for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Timing belt renewal for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Tyre checks for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Underbody inspection for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.
Wiper blade check for Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992.


Yamaha 9.9HP 15HP Outboard 1984 1985 1986 1987 1988 1989 1990 1991 1992 Workshop Service Manual.