Yamaha F4A Service Manual

SOUPAPE DE RENIFLARD
ENTLÜFTUNGSVENTIL
VÁLVULA DE VENTILACIÓN
POWR
ES
D
F
5-25
ELEMENTS POUR L’ENTRETIEN
Inspection de la soupape du reni-
flard
1. Inspectez :
9 Soupape du reniflard
Endommagée/fendue/faussée
® Remplacez.
Inspection du cheminement du reni-
flard
1. Inspectez :
9 Tuyau du reniflard 1 (grand)
Fendu/fuites/endommagé ®
Remplacez.
9 Orifice du reniflard
Obstrué ® Nettoyez.
9 Tuyau du reniflard 2 (petit)
Fendu/fuites/endommagé ®
Remplacez.
WARTUNGSPUNKTE
Inspektion des Entlüfterventils
1. Prüfen:
9 Entlüftungsventil
beschädigt/gerissen/verbo-
gen ® ersetzen
Inspektion des Entlüftungskanals
1. Prüfen:
9 Entlüfterschlauch 1 (groß)
Riß/Leck/Schaden ® erset-
zen
9 Entlüftungsöffnung
Verstopfung ® säubern
9 Entlüfterschlauch 2 (klein)
Riß/Leck/Schäden ® erset-
zen
PUNTOS DE MANTENIMIENTO
Inspección de la válvula de ventila-
ción
1. Inspeccione:
9 Válvula de ventilación
Si hay deterioro/grietas/plie-
gues ® Sustitúyala.
Inspección de la ruta de ventilación
1. Inspeccione:
9 Tubo flexible de ventilación 1
(grande)
Si hay grietas/fugas/deterioro
® Sustitúyalo.
9 Orificio de ventilación
Si hay obstrucciones ®
Límpielo.
9 Tubo flexible de ventilación 2
(pequeño)
Si hay grietas/fugas/deterioro
® Sustitúyalo.

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.