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Yamaha F20A User Manual

Yamaha F20A
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GB
EMU00317
Chapter 4
MAINTENANCE
SPECIFICATIONS .....................................4-1
TRANSPORTING AND STORING
OUTBOARD MOTOR ...............................4-5
Trailering outboard motor ...................4-5
Storing outboard motor .......................4-6
PERIODIC MAINTENANCE....................4-11
Replacement parts..............................4-11
Maintenance chart ..............................4-12
Greasing...............................................4-13
Cleaning and adjusting spark plug ...4-15
Checking fuel system .........................4-17
Inspecting fuel filter ............................4-18
Adjusting idling speed .......................4-19
Changing engine oil............................4-20
Checking timing belt...........................4-22
Replacing fuse.....................................4-23
Checking wiring and connectors.......4-23
Exhaust leakage ..................................4-23
Water leakage......................................4-23
Checking power trim and tilt
system..................................................4-24
Checking propeller..............................4-25
Changing gear oil................................4-27
Cleaning fuel tank ...............................4-29
Inspecting and replacing anode(s)....4-30
Checking battery .................................4-31
Checking bolts and nuts.....................4-34
Cleaning cooling-water passages .....4-34
Motor exterior .....................................4-35
Coating the boat bottom....................4-36
65W-9-77-4A (E,F,S)_01.10 3/25/02 7:39 PM Page 2

Table of Contents

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Yamaha F20A Specifications

General IconGeneral
BrandYamaha
ModelF20A
CategoryOutboard Motor
LanguageEnglish

Summary

Chapter 1 GENERAL INFORMATION

IDENTIFICATION NUMBERS RECORD

Record serial and key numbers for identification and reference.

EMISSION CONTROL INFORMATION

Details on emissions compliance for SAV models.

SAFETY INFORMATION

Essential safety precautions for operating the outboard motor and boat.

FUELING INSTRUCTIONS

Safe procedures for refueling the outboard motor.

ENGINE OIL

Recommended engine oil types and viscosity for 4-stroke motors.

BATTERY REQUIREMENT

Specifications for electric start models and battery connection precautions.

PROPELLER SELECTION

Guidance on choosing the correct propeller for optimal performance.

START-IN-GEAR PROTECTION

Explanation of the safety feature preventing engine start in gear.

Chapter 2 BASIC COMPONENTS

MAIN COMPONENTS

Identification of major outboard motor parts and their functions.

FUEL TANK

Description of the portable fuel tank's components and usage.

GEAR SHIFT LEVER

Operation of the gear shift lever for forward, neutral, and reverse gears.

RECOIL STARTER HANDLE

Procedure for starting the engine using the recoil starter handle.

TILLER HANDLE

Functions of the tiller handle, including throttle and stop switch.

Throttle Control Grip

How to operate the throttle control grip for speed adjustment.

Throttle Indicator

Understanding the fuel consumption curve on the throttle indicator.

Throttle Friction Adjusting Knob

Adjusting throttle friction for stable speed settings.

Engine Stop Lanyard Switch

Proper use of the engine stop lanyard switch for safety.

REMOTE CONTROL

Overview of remote control operation, including shifter and throttle.

Neutral Throttle Lever

Operation of the neutral throttle lever for engine warm-up.

Main switch

Operation of the main switch for ignition and starting.

Power Trim/Tilt Switch

Operation of the power trim/tilt switch for adjusting motor angle.

STEERING FRICTION ADJUSTING SCREW

Adjusting steering friction for smooth directional control.

TRIM TAB

Adjustment of the trim tab for steering balance.

TRIM ANGLE ADJUSTING ROD

Adjusting the trim angle using the adjusting rod.

WARNING INDICATOR(S)

Explanation of warning indicators and the warning system.

TILT LOCK MECHANISM

Function and operation of the tilt lock mechanism.

TOP COWLING LOCK LEVER

Procedure for removing and installing the top cowling.

FLUSHING DEVICE

Using the flushing device to clean cooling water passages.

WARNING SYSTEM

Overview of the engine warning system indicators.

OVERHEAT WARNING

What to do if the overheat warning device activates.

LOW OIL PRESSURE WARNING

Actions to take when the low oil pressure warning lamp activates.

Chapter 3 OPERATION

INSTALLATION

Precautions for correct outboard motor installation to prevent damage.

MOUNTING THE OUTBOARD MOTOR

Instructions for properly mounting the outboard motor on the boat.

Mounting Height

Determining the optimal mounting height for engine efficiency.

CLAMPING THE OUTBOARD MOTOR

Correct procedures for clamping the outboard motor to the transom.

BREAKING IN (RUNNING IN) ENGINE

Proper engine break-in procedure for optimal performance and engine life.

PRE-OPERATION CHECKS

Essential checks before operating the outboard motor.

CHECKING THE ENGINE OIL LEVEL

How to check and maintain the engine oil level.

FILLING FUEL

Step-by-step guide to safely filling the fuel tank.

STARTING ENGINE

Procedures for starting the engine safely, including safety warnings.

PROCEDURE FOR TILLER CONTROL MODEL

Specific starting procedures for tiller control models.

Manual Start Model

Instructions for starting the engine with a manual start system.

PROCEDURE FOR REMOTE CONTROL MODEL

Specific starting procedures for remote control models.

Electric Start Model

Instructions for starting the engine with an electric start system.

WARMING UP ENGINE

Importance of warming up the engine before operation.

SHIFTING

Procedures for shifting between forward, neutral, and reverse gears.

FORWARD

How to engage the forward gear safely.

REVERSE

Procedures for engaging reverse gear safely.

STOPPING ENGINE

Correct procedure for stopping the engine.

TRIMMING OUTBOARD MOTOR

Understanding trim angle and its effect on boat performance.

ADJUSTING TRIM ANGLE

How to adjust the trim angle for optimal boat handling.

Bow Up

Effects of bow-up trim on boat stability and performance.

Bow Down

Effects of bow-down trim on boat acceleration and handling.

TILTING UP/DOWN

Procedures for tilting the outboard motor up or down.

CRUISING IN SHALLOW WATER

Operating the motor in shallow water with specific precautions.

CRUISING IN OTHER CONDITIONS

General advice for operating in different water conditions.

CRUISING IN SALT WATER

Proper care after operating in salt water to prevent corrosion.

CRUISING IN TURBID WATER

Recommendation for optional equipment when operating in turbid water.

Chapter 4 MAINTENANCE

SPECIFICATIONS

Detailed technical specifications for the outboard motor models.

TRANSPORTING AND STORING OUTBOARD MOTOR

Guidelines for safe transporting and storing of the outboard motor.

STORING OUTBOARD MOTOR

Procedures for long-term storage to prevent damage.

Flushing Cooling System

How to flush the engine’s cooling system with fresh water.

Battery Care

Safety precautions and maintenance for the boat battery.

PERIODIC MAINTENANCE

Importance of regular maintenance and using genuine parts.

MAINTENANCE CHART

Schedule of maintenance tasks and their intervals.

GREASING

Locations and types of grease to use for lubrication points.

CLEANING AND ADJUSTING SPARK PLUG

How to inspect, clean, and adjust spark plugs.

INSPECTING FUEL FILTER

Procedure for inspecting and replacing the fuel filter.

ADJUSTING IDLING SPEED

Steps for adjusting the engine's idling speed.

CHANGING ENGINE OIL

Instructions for draining and refilling the engine oil.

CHECKING TIMING BELT

How to inspect the timing belt for wear and damage.

REPLACING FUSE

Procedure for replacing a blown fuse in electric start models.

CHECKING WIRING AND CONNECTORS

Inspecting electrical wiring and connectors for secure connections.

EXHAUST LEAKAGE

Checking for exhaust leaks from engine joints.

WATER LEAKAGE

Checking for water leaks from engine joints.

CHECKING POWER TRIM AND TILT SYSTEM

Procedures for checking the power trim and tilt system for leaks and function.

CHECKING PROPELLER

Inspecting the propeller for damage, wear, and obstructions.

Removing the Propeller

Step-by-step guide to removing the propeller.

Installing the Propeller

Instructions for correctly installing the propeller.

CHANGING GEAR OIL

Procedures for draining and refilling the gearcase oil.

CLEANING FUEL TANK

Safe procedures for cleaning the fuel tank.

INSPECTING AND REPLACING ANODE(S)

Checking and replacing sacrificial anodes for corrosion protection.

CHECKING BATTERY

Safety precautions and checks for the boat battery.

CHECKING BOLTS AND NUTS

Verifying the tightness of critical bolts and nuts.

CLEANING COOLING-WATER PASSAGES

How to clean the engine’s cooling water passages.

MOTOR EXTERIOR

Cleaning and inspecting the exterior of the outboard motor.

COATING THE BOAT BOTTOM

Importance of hull cleaning and anti-fouling paint.

Chapter 5 TROUBLE RECOVERY

TROUBLESHOOTING

Chart detailing common engine problems, causes, and remedies.

TEMPORARY ACTION IN EMERGENCY

Immediate actions to take in emergency situations.

IMPACT DAMAGE

Procedures for addressing damage caused by collision.

STARTER WILL NOT OPERATE

Troubleshooting steps when the starter mechanism fails.

TREATMENT OF SUBMERGED MOTOR

Procedures for treating an outboard motor that has been submerged.

Chapter 6 INDEX

INDEX

Alphabetical listing of topics and their corresponding page numbers.

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