Yamaha 4A User Manual (English)

Mr. Jeremiah PierceAug 7, 2025

Why won't the starter operate on my Yamaha Outboard Motor?

D
Danielle MiddletonAug 7, 2025
If the starter on your Yamaha Outboard Motor won't operate, it could be due to a weak or low battery (check its condition and use the recommended capacity), loose or corroded battery connections (tighten cables and clean terminals), a blown fuse in the electric start circuit (check for overload, repair, and replace the fuse with the correct amperage), faulty starter components, or the shift lever being in gear (position it to neutral). If the starter components are faulty, have a Yamaha dealer service them.

Fuel Induction System	Carburetor
Starting System	Manual
Ignition System	CDI
Max. Output	4 hp
Full Throttle RPM Range	4500 - 5500 rpm
Gear Ratio	2.08
Weight	22 kg
Gear Shift	F-N
Shaft Length	Short (381 mm)

Fuel Induction System

Carburetor

Starting System

Manual

Ignition System

CDI

Max. Output

4 hp

Full Throttle RPM Range

4500 - 5500 rpm

Gear Ratio

2.08

Weight

22 kg

Gear Shift

F-N

Shaft Length

Short (381 mm)

Summary

Chapter 1: GENERAL INFORMATION

SAFETY INFORMATION

Provides essential safety precautions for operating the outboard motor and boat, covering warnings and advice.

FUELING INSTRUCTIONS

Details the safe procedures for refueling the outboard motor, including precautions for gasoline handling and storage.

GASOLINE AND ENGINE OIL

Specifies the recommended types of gasoline and engine oil, including mixture ratios and important notes.

Chapter 2: BASIC COMPONENTS

MAIN COMPONENTS

Identifies and illustrates the key external parts of the outboard motor, providing a visual reference for users.

OPERATIONS OF CONTROLS AND OTHER FUNCTIONS

Explains the function and operation of various controls and other essential parts of the outboard motor.

Chapter 3: OPERATION

INSTALLATION

Covers the essential steps and considerations for correctly mounting the outboard motor onto the boat for safe operation.

STARTING ENGINE

Provides detailed instructions and safety precautions for starting the outboard motor, including manual start procedures.

STOPPING ENGINE

Details the correct procedures for safely stopping the outboard motor, including important notes and precautions.

Chapter 4: MAINTENANCE

SPECIFICATIONS

Lists the technical specifications for different models, including dimensions, performance, engine, and fuel/oil details.

PERIODIC MAINTENANCE

Outlines the recommended maintenance schedule and tasks, indicating items for self-service and dealer service.

CHECKING PROPELLER; SHEAR PIN AND COTTER PIN

Provides guidance on inspecting the propeller, shear pin, and cotter pin for wear, damage, and proper condition.

Chapter 5: TROUBLE RECOVERY

TROUBLESHOOTING

Offers a comprehensive guide to diagnosing and resolving common problems with the outboard motor's starting and operation.

IMPACT DAMAGE

Details temporary actions to take in case of impact damage to the outboard motor, including immediate steps and inspection.

Chapter 6: INDEX

INDEX

Alphabetical listing of topics covered in the manual, with corresponding page numbers for easy reference.

Yamaha 4A User Manual

Table of Contents

Questions and Answers:

Yamaha 4A Specifications