Yamaha F4A Service Manual

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p

Marine

Outboards

F4A

290333

WORLD WIDE

F4

USA/CANADA

SERVICE MANUAL

MANUEL D’ENTRETIEN

WARTUNGSANLEITUNG

MANUAL DE SERVICIO

E

F

D

ES

Table of Contents

Default Chapter4
- How to Use this Manual4
- How to Use this Manual10
- Symbols12
- Index14
- Table of Contents15
- General Information16
Informations17
Generales17
Allgemeine Angaben17
Chapter 118
Identification18
- Serial Number18
- Starting Serial Numbers18
Safety While Working20
- Fire Prevention20
- Ventilation20
- Self-Protection20
- Oils, Greases and Sealing Fluids20
- Good Working Practices22
- Disassembly and Assembly24
Special Tools26
- Measuring26
- Outillage Special27
- Removal and Installation28
  - Stopper Guide Plate28
  - Handling Precautions34
Specifications36
Technische Daten37
Chapter 238
General Specifications38
Maintenance Specifications42
- Power Unit42
- Lower48
- Electrical48
- Dimensions50
Inspection59
Maintenance Interval Chart60
Chapter 364
- Inspection and Adjustment64
- Fuel Tank and Fuel Line64
- Fuel Cock64
- Fuel Joint64
- Fuel Filter Replacement64
Periodic Service64
- Fuel System64
Periodique Et65
- Control System/Power Unit70
- Engine Oil Level70
- Start-In-Gear Protection Adjustment70
- Engine Oil Replacement72
Circuit D'alimentation65
- Control System66
- Throttle Cable66
- Idling Speed (for USA)66
- Idling Speed (Except for USA)68
Moteur73
- Valve Clearance74
- Checking the Spark Timing76
- T.C.I. Air Gap Adjustment78
- Gear Oil80
- Lower Unit Leakage Check80
Boitier D'helice81
- Anode82
- Lower Unit/General82
- Spark Plug82
- Compression Pressure Measurement86
  - Grease Points88
  - Fuel System92
Chapter 494
- Exploded Diagram94
- Removal and Installation Chart94
- Service Points98
- Fuel Tank Inspection98
- Fuel Strainer Inspection98
- Fuel Cock Inspection98
- Fuel Joint Inspection98
Fuel Tank, Fuel Cock and Fuel Joint94
Fuel Pump and Fuel Filter100
- Exploded Diagram100
- Removal and Installation Chart100
- Service Points102
- Fuel Filter Inspection102
- Fuel Filter Installation102
Fuel Pump104
- Exploded Diagram104
- Removal and Installation Chart104
- Service Points106
Unterer Teil205
- Lower Unit Removal212
- Water Pump214
- Impeller and Insert Cartridge Inspection218
- Water Pump Housing Inspection218
- Water Pump Installation218
- Lower Casing Cap Ass'y, Reverse Gear and Propeller Shaft220
- Lower Casing Cap Ass’y, Reverse Gear Andpropeller Shaft Removal224
- Reverse Gear Inspection224
- Propeller Shaft Ass'y226
- Dog Clutch and Shift Spring Installation228
- Dog Clutch Inspection228
- Propeller Shaft Inspection228
- Lower Casing Cap Ass'y230
- Bearings Inspection232
- Lower Casing Cap Oil Seal Removal232
- Lower Casing Cap/Propeller Shaft Bearing Removal232
- Slide Hammer Set232
- Lower Casing Cap Assembly234
- Lower Casing Cap Inspection234
- Washer234
- Gear Shift Check236
- Drive Shaft, Forward Gear and Shift Rod238
- Lower Case Disassembly242
- Pinion and Forward Gear Removal242
- Pinion and Forward Gear Inspection244
- Spacer244
- Busing Inspection246
- Drive Shaft Inspection246
- Lower Case Inspection246
- Shift Cam Inspection246
- Bracket Unit252
Unidad Inferior205
Carrying Handle and Bottom Cowling254
Chapter 7254
- Exploded Diagram254
- Removal and Installation Chart254
Steering Handle258
- Exploded Diagram258
- Removal and Installation Chart258
Upper Case Ass'y266
- Exploded Diagram266
- Bushing Inspection270
Chapter 8278
Electrical Components278
Wiring Diagram280
Electrical Analysis282
- Digital Circuit Tester282
- Peak Voltage Measurement282
- Peak Voltage Adaptor282
- Inspection282
Ignition System286
- Wiring Diagram286
Trbl Anls296
- Trouble-Analysis296
- Trouble Analysis Chart298

Other manuals for Yamaha F4A

Owner's Manual174 pages

Questions and Answers:

J
Jean StokesAug 18, 2025
How to fix excessive vibration in my Yamaha Outboard Motor?
- S
  sarahsanchezAug 18, 2025
  To address excessive vibration in your Yamaha Outboard Motor, start by checking the propeller for any damage and have it repaired or replaced if needed. Remove any weeds or foreign matter tangled on the propeller. Ensure the motor mounting bolt is tightened. If the steering pivot is loose or damaged, tighten it or have it serviced by a Yamaha dealer. If the propeller shaft is damaged, have the motor serviced by a Yamaha dealer.

Yamaha F4A Specifications

General

Starting System	Manual
Fuel Induction System	Carburetor
Ignition System	CDI
Lubrication System	Wet sump
Max. Output	4 hp
Gear Ratio	2.08:1
Dry Weight	27 kg
Shaft Length	381 mm (S), 508 mm (L)
Steering	Tiller
Gear Shift	Forward, Neutral

Summary

Yamaha Marine Outboards Service Manual

Important Information

Safety Alert Symbol

Explains the meaning of the safety alert symbol (ATTENTION! YOUR SAFETY IS INVOLVED!).

Warning Instructions

Details the severe consequences of not following WARNING instructions.

Chapter 1 General Information

Safety While Working

Essential safety precautions for working with the outboard motor.

Handling Precautions

Chapter 2 Specifications

General Specifications

Key specifications including dimensions, weight, performance, and unit details.

Maintenance Specifications

Technical data for engine, lower unit, electrical, and tightening torques.

Tightening Torque

Chapter 3 Periodic Inspection and Adjustment

Maintenance Interval Chart

Schedule of recommended maintenance tasks based on operating hours.

Fuel System

Power Unit

Maintenance for engine oil, valve clearance, spark timing, and T.C.I.

Chapter 4 Fuel System

Fuel Tank, Fuel Cock and Fuel Joint

Fuel Pump and Fuel Filter

Fuel Pump

Carburetor

Exploded diagrams, disassembly, and service procedures for the carburetor.

Chapter 5 Power Unit

Recoil Starter

Cylinder Head and Push Rod

Exploded diagrams and procedures for cylinder head and push rod maintenance.

Rocker Arm and Valves

Exploded diagrams and procedures for rocker arms and valves.

Crankcase and Camshaft

Crankshaft and Cylinder Body

Connecting Rod and Piston

Exploded diagrams and procedures for connecting rod and piston assembly.

Chapter 6 Lower Unit

Lower Unit

Water Pump

Exploded diagrams and procedures for water pump inspection and installation.

Lower Casing Cap Assy, Reverse Gear and Propeller Shaft

Drive Shaft, Forward Gear and Shift Rod

Chapter 8 Electrical

Wiring Diagram

Diagram illustrating the electrical system connections.

Electrical Analysis

Procedures for inspecting electrical components and measuring voltage.

Ignition System

Information on spark gap, peak voltage, and coil resistance.

Chapter 9 Trouble-Analysis

Trouble Analysis

General troubleshooting guide and initial checks.

Trouble Analysis Chart

Table correlating symptoms with potential causes and solutions.

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