Yamaha F9.9C User Manual (English)

Other manuals for Yamaha F9.9C

Ower's Manual117 pages

Service Manual511 pages

Questions and Answers:

D
Daisy EvansJul 30, 2025
What to do if the starter will not operate on my Yamaha Outboard Motor?
- R
  rhunterJul 30, 2025
  If your Yamaha Outboard Motor's starter isn't operating, here's what you can check: * The battery might be weak or have low capacity. Inspect its condition and replace it with a battery of the recommended capacity. * Loose or corroded battery connections can also be the culprit. Tighten the battery cables and clean the terminals. * The fuse for the electric start circuit may have blown. Find the cause of the electrical overload, fix it, and then replace the fuse with one that has the correct amperage. * Ensure that the shift lever is in neutral.
J
Jeremy MillerAug 5, 2025
What to do if my Yamaha F9.9C engine will not start, but the starter operates?
- J
  Joel ParkerAug 5, 2025
  If your Yamaha Outboard Motor's engine won't start, even though the starter is working, consider these possibilities: * The fuel tank could be empty. Refill it with clean, fresh fuel. * The fuel might be contaminated or stale. Replace it with clean, fresh fuel. * A clogged fuel filter could be the issue. Clean or replace the filter. * The engine stop switch lanyard may not be attached. Attach the lanyard.
F
Frederick JonesAug 10, 2025
What to do if my Yamaha Outboard Motor engine won't start but the starter operates?
- J
  jonathannicholsonAug 10, 2025
  If your Yamaha Outboard Motor's engine won't start, but the starter is working, consider these potential causes: * The fuel tank may be empty: Refill it with clean, fresh fuel. * The fuel may be contaminated or stale: Replace it with clean, fresh fuel. * The fuel filter might be clogged: Clean or replace the filter. * The spark plugs could be fouled or of an incorrect type: Inspect the spark plugs and clean or replace them with the recommended type. * The spark plug caps may be fitted incorrectly: Check and refit the caps. * There may be poor connections or damaged ignition wiring: Check the wires for wear or breaks, tighten any loose connections, and replace worn or broken wires. * The engine stop switch lanyard may not be attached: Attach the lanyard.
R
robert57Aug 15, 2025
Why does my Yamaha F9.9C Outboard Motor engine idle irregularly or stall?
- A
  ashleyleonardAug 15, 2025
  An irregular idle or stalling in your Yamaha Outboard Motor can stem from several issues: * The spark plugs may be fouled or of an incorrect type: Inspect the spark plugs and clean or replace them with the recommended type. * There might be an obstruction in the fuel system: Check for pinched or kinked fuel lines or other obstructions. * The fuel could be contaminated or stale: Replace it with clean, fresh fuel. * The fuel filter may be clogged: Clean or replace the filter. * The spark plug gap may be incorrect: Inspect and adjust as specified. * The warning system may be activated: Find and correct the cause of the warning.
B
bauermarcusAug 20, 2025
How to fix faulty starter components on a Yamaha F9.9C Outboard Motor?
- E
  Eric ScottAug 20, 2025
  If the starter of your Yamaha Outboard Motor won't operate, and you've checked the obvious things like the battery and connections, it could be due to faulty starter components. In this case, it's best to have it serviced by a Yamaha dealer.
N
Nicole JohnsonAug 25, 2025
How to fix a Yamaha Outboard Motor when the starter will not operate?
- A
  Andrea BowenAug 26, 2025
  If the starter on your Yamaha Outboard Motor isn't working, here are a few things you can check: * The battery capacity may be weak or low: Check the battery condition and use a battery with the recommended capacity. * The battery connections might be loose or corroded: Tighten the battery cables and clean the battery terminals. * The fuse for the electric start circuit could be blown: Check for the cause of the electric overload and repair it. Replace the fuse with one of the correct amperage. * The shift lever may be in gear: Shift to neutral.

Yamaha F9.9C Specifications

General

Brand	Yamaha
Model	F9.9C
Category	Outboard Motor
Language	English

Summary

Chapter 1 GENERAL INFORMATION

IDENTIFICATION NUMBERS RECORD

Record of outboard motor serial number and key number.

EMISSION CONTROL INFORMATION

Conformance to emission control regulations for Bodensee.

SAFETY INFORMATION

Essential safety precautions for operating the outboard motor.

FUELING INSTRUCTION

Safe procedures for refueling the outboard motor.

GASOLINE

Recommended gasoline type and octane rating.

ENGINE OIL

Recommended engine oil type, viscosity, and quantity.

BATTERY REQUIREMENT

Specifications for the required battery for electric start models.

PROPELLER SELECTION

Guidance on choosing the correct propeller for optimal performance.

START-IN-GEAR PROTECTION

Explanation of the safety feature preventing starting in gear.

Chapter 2 BASIC COMPONENTS

MAIN COMPONENTS OVERVIEW

Identifies and illustrates the primary physical parts of the outboard motor.

OPERATING THE MOTOR CONTROLS

Explains the function and operation of various motor controls and systems.

Fuel System Operation

Details the operation of the fuel tank and related components.

Starting and Shifting Controls

Covers gear shift, choke, starter, and recoil starter operations.

Steering and Throttle Operation

Explains tiller handle, throttle grip, and steering friction adjustments.

Remote Control Operation

Operation of remote control lever, switches, and related functions.

Motor Angle Adjustment Systems

Details operation of power tilt, trim, and tilt lock mechanisms.

Safety and Warning Systems

Covers engine stop lanyard, warning indicators, and oil pressure warnings.

Other Component Functions

Describes tilt lock, tilt support, flushing device, and other components.

Chapter 3 OPERATION

INSTALLATION AND MOUNTING

Guidelines for correctly installing and mounting the outboard motor.

PRE-OPERATION CHECKS

Essential safety and operational checks before starting the engine.

Fuel System Checks

Procedures for checking fuel levels, leaks, and connections.

Engine Oil Level Check

How to check and maintain the engine oil level.

STARTING THE ENGINE

Step-by-step procedures for starting the engine.

Starting Procedures by Model

Specific starting steps for manual, electric, and remote control models.

ENGINE WARM-UP AND SHIFTING

Procedures for warming up the engine and shifting gears.

Engine Warm-up Procedure

How to warm up the engine before operation.

Gear Shifting Operations

Correct steps for shifting into forward, neutral, and reverse gears.

ENGINE STOPPING AND MOTOR ANGLE ADJUSTMENT

Procedures for stopping the engine and adjusting motor angle.

Stopping the Engine

Correct procedure for shutting down the engine.

Trimming the Outboard Motor

Adjusting the motor's trim angle for optimal performance.

Tilting the Motor Up and Down

Procedures for tilting the motor for shallow water or transport.

SPECIAL OPERATION MODES

Guidelines for specific operating conditions.

Shallow Water Cruising

Operation instructions for shallow water conditions.

Cruising in Other Conditions

Recommendations for operating in salt and turbid water.

Chapter 4 MAINTENANCE

SPECIFICATIONS AND SCHEDULES

Detailed technical specifications and periodic maintenance schedule for motor models.

TRANSPORTING AND STORING GUIDELINES

Proper procedures for transporting and storing the outboard motor.

Trailering and Storing Procedures

Guidelines for trailering and storing the motor safely.

PERIODIC MAINTENANCE SCHEDULE

Overview of regular maintenance tasks and their recommended frequency.

Replacement Parts Guidance

Recommendations for using genuine Yamaha replacement parts.

DETAILED MAINTENANCE PROCEDURES

Specific instructions for various maintenance tasks.

Spark Plug Service

Cleaning, inspecting, and adjusting spark plugs.

Fuel System Maintenance

Inspecting and maintaining the fuel system components.

Engine Oil and Filter Service

Step-by-step guide for changing engine oil and filter.

Gear Oil Change

Procedure for changing the gear oil.

Battery Maintenance and Care

Procedures for checking and maintaining the battery.

Propeller and Anode Service

Inspecting and replacing the propeller and anodes.

Cooling System Maintenance

Flushing and cleaning the cooling system and passages.

Fuel Filter Service

Procedures for inspecting and servicing the fuel filter.

Idling Speed Adjustment

How to check and adjust the engine's idling speed.

Fuse Replacement

Steps for replacing blown fuses in electric start models.

Wiring and Connector Checks

Inspecting electrical connections for proper function.

Power Tilt System Check

Checking the power tilt system for operation and leaks.

Bolts and Nuts Tightening Check

Checking the tightness of critical bolts and nuts.

Cooling Water Passages Cleaning

Procedure for flushing the cooling water passages.

Motor Exterior Care

Cleaning and inspecting the motor's exterior and painted surface.

Boat Bottom Coating

Recommendations for coating the boat bottom for performance.

Chapter 5 TROUBLE RECOVERY

TROUBLESHOOTING GUIDE

A systematic guide to diagnosing and resolving common engine problems.

EMERGENCY PROCEDURES

Actions to take in urgent situations like impact or system failure.

Handling Impact Damage

Immediate steps after the motor hits an object in the water.

Manual Tilt Operation

Procedure for manually tilting the motor when the power tilt fails.

Emergency Starting Procedure

How to start the engine using an emergency starter rope.

Submerged Motor Treatment

Critical steps to take if the outboard motor is submerged in water.

Chapter 6 INDEX

INDEX OF TOPICS

Alphabetical listing of topics covered in the manual for quick reference.

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