Yamaha 40B User Manual

Printed in Japan
April 2003-0.5 × 1 !
63B-28199-1B
(40VETO, 50HETO)
(E)
Printed on recycled paper
40C
50C
OWNER’S MANUAL
U.S.A.Edition
LIT-18626-05-44
63B-9-1B-hyoshi 2/27/03 2:44 PM Page 1

Yamaha 40B Specifications

General

Engine Type	2-Stroke
Max Output	40 hp
Full Throttle RPM Range	4500-5500 rpm
Fuel Induction System	Carburetor
Fuel System	Carburetor
Starting System	Manual or Electric
Ignition System	CDI
Fuel Type	Gasoline
Lubrication	Premix
Shaft Length	20"
Cooling System	Water Cooled
Fuel Tank Capacity	24 Liters (6.3 US Gal) - External

Summary

TO THE OWNER

CAUTION: Notes and Symbols

Explains caution notes and symbols used in the manual for clarity.

Chapter 1 GENERAL INFORMATION

IDENTIFICATION NUMBERS

Record of serial numbers and key numbers for your outboard motor.

EMISSION CONTROL INFORMATION

Details on emission standards and compliance for North American models.

SAFETY INFORMATION

Crucial precautions for safe operation and handling of the outboard motor.

IMPORTANT LABELS

Identification and explanation of warning and caution labels on the motor.

BASIC BOATING RULES

Essential rules for navigating waterways and interacting with other vessels.

FUELING INSTRUCTIONS

Guidelines for safe and proper refueling of the outboard motor.

BATTERY REQUIREMENT

Specifications for the correct type and capacity of battery.

PROPELLER SELECTION

Advice on choosing the right propeller for optimal performance and motor health.

START-IN-GEAR PROTECTION

Explanation of the safety feature preventing engine start in gear.

Chapter 2 BASIC COMPONENTS

MAIN COMPONENTS

Identification of the primary physical parts of the outboard motor.

FUEL TANK

Details on the portable fuel tank system and its components.

REMOTE CONTROL

Explanation of the functions and operation of the remote control system.

Power Trim/Tilt Switch

Operation of the switch used to adjust motor angle.

Engine stop lanyard switch

Function and use of the safety lanyard to stop the engine.

Throttle friction adjusting screw

How to adjust the resistance for the throttle lever.

WARNING INDICATOR

Description of the indicator light that signals potential engine issues.

DIGITAL TACHOMETER

Information on the multi-function digital display gauge.

Trim Meter

How the meter displays and indicates the motor's trim angle.

Hour Meter

Functionality for tracking engine run time, including trip hours.

Oil-Level Indicator

Explanation of the gauge that monitors engine oil level.

Overheat Warning Indicator

Description of the indicator for engine overheating.

TRIM TAB

Information on the adjustable trim tab for steering control.

TILT SUPPORT LEVER

How to use the lever to lock the motor in a tilted position.

TOP COWLING LOCK LEVER

Operation of the lever used to secure the engine cover.

WARNING SYSTEM

Overview of the engine's warning indicators and their functions.

OIL LEVEL WARNING / OIL FILTER CLOGGING WARNING

Details on specific oil-related warnings.

Chapter 3 OPERATION

INSTALLATION

General guidelines and precautions for installing the outboard motor.

FILLING FUEL AND ENGINE OIL

Procedures for filling the fuel and oil tanks.

PRE-OPERATION CHECKS

Essential checks to perform before operating the motor.

OPERATION AFTER A LONG PERIOD OF STORAGE

Steps to follow when starting the engine after extended storage.

BREAKING IN ENGINE

Recommended procedure for breaking in a new engine for optimal life.

STARTING ENGINE

Step-by-step guide for starting the outboard motor.

WARMING UP ENGINE

Procedure for warming up the engine before operation.

SHIFTING

Instructions on how to engage forward and reverse gears.

STOPPING ENGINE

Correct procedure for shutting down the outboard motor.

TRIMMING OUTBOARD MOTOR

Explanation of how motor trim affects boat performance.

TILTING UP/DOWN

Procedures for tilting the motor up or down for protection or shallow water.

CRUISING IN OTHER CONDITIONS

Advice for operating in specific water conditions like salt or turbid water.

Chapter 4 MAINTENANCE

SPECIFICATIONS

Technical data and performance details for the outboard motor.

TRANSPORTING AND STORING OUTBOARD MOTOR

Guidelines for safely transporting and storing the motor.

TRAILERING OUTBOARD MOTOR

Specific procedures for trailering the outboard motor.

STORING OUTBOARD MOTOR

Specific procedures for storing the outboard motor long-term.

Flushing Cooling System and Fogging Engine

Procedure to flush the cooling system and protect the engine during storage.

Lubrication

General lubrication points and procedures for the outboard motor.

Cleaning and Anti-corrosion Measure

Steps to clean and protect the motor's exterior.

Battery Care

Procedures for maintaining and caring for the boat battery.

PERIODIC MAINTENANCE

Schedule and overview of regular maintenance tasks.

MAINTENANCE CHART

A table outlining scheduled maintenance items and intervals.

GREASING

Specific points and procedures for greasing the motor's components.

CLEANING AND ADJUSTING SPARK PLUG

How to inspect, clean, and adjust spark plugs.

CHECKING TOP COWLING

How to inspect the fit and condition of the engine cover.

CHECKING FUEL SYSTEM

Procedures for inspecting the fuel lines, filters, and connections.

CLEANING FUEL FILTER

Steps to clean the fuel filter assembly.

INSPECTING IDLING SPEED

How to check and verify the correct engine idling speed.

CHECKING WATER IN ENGINE OIL TANK

Procedure to check for water contamination in the oil tank.

REPLACING FUSE

Instructions for replacing a blown fuse in the electrical system.

CHECKING WIRING AND CONNECTORS

How to inspect electrical connections for security.

EXHAUST LEAKAGE

Procedure to check for leaks in the exhaust system.

WATER LEAKAGE

Procedure to check for water leaks in the engine casing.

CHECKING POWER TRIM AND TILT SYSTEM

How to inspect the operation and condition of the trim/tilt system.

CHECKING PROPELLER

Steps for inspecting the propeller blades, shaft, and seals.

CHANGING GEAR OIL

Procedure for draining and refilling the gear case oil.

CLEANING FUEL TANK

Instructions for cleaning the portable fuel tank.

INSPECTING AND REPLACING ANODE(S)

How to check and replace sacrificial anodes for corrosion protection.

CHECKING BATTERY (for Electric start models)

Procedures for inspecting and maintaining the battery.

Connecting the Battery

Steps for correctly connecting the boat battery.

CHECKING BOLTS AND NUTS

How to check the tightness of critical bolts and nuts.

MOTOR EXTERIOR

Procedures for cleaning the motor's exterior and painted surfaces.

COATING THE BOAT BOTTOM

Advice on applying anti-fouling paint to the boat hull.

Chapter 5 TROUBLE RECOVERY

TROUBLESHOOTING

A guide to diagnose and resolve common engine problems.

TEMPORARY ACTION IN EMERGENCY

Immediate steps to take in various emergency situations.

STARTER WILL NOT OPERATE

Troubleshooting and manual starting procedures if the starter fails.

ENGINE FAILS TO OPERATE

Steps to take when the engine fails to start or run correctly.

TREATMENT OF SUBMERGED MOTOR

Procedures for initial care of a motor that has been submerged.

WARRANTY INFORMATION

Important Warranty Information for U.S.A. and Canada

Overview of warranty coverage and registration for US/Canada.

Yamaha Motor Corporation, U.S.A. Outboard Motor Two Year Limited Warranty

Detailed terms and conditions of the limited warranty.

Warranty Questions and Answers

Common questions and answers regarding warranty coverage and procedures.

Customer Service and Address Changes

Information on contacting Yamaha for service and updating address records.

Warranty Information Outside U.S.A. or Canada

Guidance on warranty service when outside the US or Canada.