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Yamaha MX250 User Manual

Yamaha MX250
124 pages
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SERVICE MANUAL
MX250
MX300
7VE-F8197-10LIT-19616-02-45
2017.03×1
!
7VE-F8197-10_Cover.indd 1 2017/03/16 16:24:49

Table of Contents

Questions and Answers:

Yamaha MX250 Specifications

General IconGeneral
BrandYamaha
ModelMX250
CategoryOutboard Motor
LanguageEnglish

Summary

General Information

Machine Identification and Dimensions

Details on serial numbers, engine dimensions, and physical specifications.

Important Service Information and Notes

Crucial details on safety, preparation, and general service procedures.

Basic Service Information and Special Tools

Fundamental service procedures, electrical checks, and specialized tools.

Periodic Maintenance

Maintenance Intervals and Schedules

Comprehensive chart detailing periodic maintenance and lubrication requirements.

Engine Care and System Checks

Procedures for engine oil, fuel system, air filter, and exhaust maintenance.

Component Adjustments and Operational Checks

Covers valve clearance, engine speed, recoil starter, and fastener checks.

Engine Components and Inspection

Engine Inspection and Compression Testing

Procedures for inspecting engine health, including compression testing.

Air Filter, Fuel Tank, and Muffler Servicing

Maintenance and checks for air filter, fuel tank, and muffler systems.

Recoil Starter and Flywheel Service

Servicing procedures for recoil starter and flywheel assemblies.

Governor System and Engine Controls

Details on throttle lever, governor, and engine switch/warning unit.

Cylinder Head, Valves, and Piston Assembly

Inspection and assembly of cylinder head, valves, piston, crankshaft, and camshaft.

Carburetor Service

Carburetor Removal and Disassembly

Step-by-step guide for removing and taking apart the carburetor assembly.

Carburetor Checks and Specifications

Procedures for checking float height, jets, and valve seats.

Electrical System Checks

Circuit Diagram and Component Identification

Overview of the electrical system layout and component identification.

Component Testing and Continuity Checks

Detailed procedures for testing switches, ignition components, and wiring.

Troubleshooting Guide

Engine Start and Stalling Issues

Common causes and remedies for an engine that fails to start or stalls.

Engine Speed and Governor Problems

Diagnosing and resolving issues with uneven or incorrect engine speed and governor operation.

Specifications and Torque Values

General and Maintenance Specifications

Detailed specifications for engine, electrical, and lubrication components.

Tightening Torques and Torque Guidelines

Standard and specific torque values for fasteners and assemblies.

Wire Routing Diagrams

Visual guides for routing electrical wires and harnesses on the engine.

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