Yamaha 8C User Manual (English)

coxrogerAug 21, 2025

How to fix a Yamaha 8C when the starter will not operate?

M
Michael JohnsonAug 21, 2025
If the starter on your Yamaha Outboard Motor isn't working, begin by checking the battery's condition and ensuring it has the recommended capacity. Weak or low battery capacity can prevent the starter from operating. Also, verify that the battery connections are tight and free from corrosion; tighten the cables and clean the terminals if necessary. Check the fuse for the electric start circuit and replace it with one of the correct amperage if it's blown, after checking for the cause of the electric overload. Ensure the shift lever is in neutral. If these steps don't resolve the issue, the starter components may be faulty and require servicing by a Yamaha dealer.

Engine Type	2-Stroke
Starting System	Manual
Max. Output	8 hp
Full Throttle RPM Range	4500 - 5500 rpm
Fuel Tank Capacity	12 L
Gear Ratio	2.08

Engine Type

2-Stroke

Starting System

Manual

Max. Output

8 hp

Full Throttle RPM Range

4500 - 5500 rpm

Fuel Tank Capacity

12 L

Gear Ratio

2.08

Summary

Chapter 1 GENERAL INFORMATION

IDENTIFICATION NUMBERS RECORD

Record and reference for outboard motor serial numbers.

SAFETY INFORMATION

Essential safety precautions for operating the outboard motor.

FUELING INSTRUCTIONS

Guidelines for safe refueling with gasoline and oil.

BATTERY REQUIREMENT

Specifications for batteries used with electric start models.

PROPELLER SELECTION

Guidance on selecting 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 and illustration of the outboard motor's primary parts.

OPERATIONS OF CONTROLS AND OTHER FUNCTIONS

Explains the function and operation of various controls and features.

FUEL TANK

Details the portable fuel tank's components and function.

GEAR SHIFT LEVER

Instructions for operating the gear shift lever (forward, neutral, reverse).

ENGINE STOP SYSTEMS

Covers the engine stop button and lanyard switch for safety.

THROTTLE CONTROL

Explains how to use the throttle grip and related adjustments.

Chapter 3 OPERATION

INSTALLATION

Procedures and precautions for installing the outboard motor.

PRE-OPERATION CHECK

Steps to perform before starting the engine for safe operation.

STARTING ENGINE

Step-by-step guide on how to start the outboard motor.

SHIFTING

Instructions on how to shift between forward, neutral, and reverse gears.

TRIMMING OUTBOARD MOTOR

Explanation of outboard motor trimming and its effect on performance.

Chapter 4 MAINTENANCE

SPECIFICATION DATA

Technical specifications for various outboard motor models.

TRANSPORTING AND STORING OUTBOARD MOTOR

Guidelines for safely transporting and storing the outboard motor.

PERIODIC MAINTENANCE

Schedule of regular maintenance tasks and intervals.

Replacement parts

Information on using genuine Yamaha or equivalent replacement parts.

Maintenance chart

A schedule outlining recommended maintenance intervals and tasks.

Cleaning and adjusting spark plug

Instructions for cleaning and adjusting the spark plug for engine performance.

Checking fuel system

Procedures for inspecting the fuel system for leaks or damage.

Greasing

Guidance on greasing points to ensure proper lubrication and prevent corrosion.

Chapter 5 TROUBLE RECOVERY

TROUBLESHOOTING

Guide to diagnosing and resolving common engine problems and their causes.

IMPACT DAMAGE

Steps to take if the outboard motor sustains damage from collision.

STARTER WILL NOT OPERATE

Troubleshooting steps for when the starter mechanism fails to operate.

TREATMENT OF SUBMERGED MOTOR

Instructions for treating an outboard motor that has been submerged in water.

Chapter 6 INDEX

INDEX

Alphabetical listing of topics and their corresponding page numbers for easy reference.

Yamaha 8C User Manual

Table of Contents

Questions and Answers:

Yamaha 8C Specifications