Yamaha F4A - Chapter 5 Power Unit

E
POWR
CHAPTER 5
POWER UNIT
RECOIL STARTER..........................................................................................5-1
EXPLODED DIAGRAM ............................................................................5-1
REMOVAL AND INSTALLATION CHART................................................5-1
SERVICE POINTS.....................................................................................5-4
Sheave drum removal.......................................................................5-4
Spiral spring removal........................................................................5-4
Starter-in-gear protection lever inspection .....................................5-5
Drive pawl and spring inspection ....................................................5-5
Sheave drum inspection ...................................................................5-5
Spiral spring inspection ....................................................................5-5
Starter rope inspection .....................................................................5-5
Spiral spring installation...................................................................5-6
Recoil starter checking......................................................................5-6
IGNITOR ASS’Y.............................................................................................5-7
EXPLODED DIAGRAM ............................................................................5-7
REMOVAL AND INSTALLATION CHART................................................5-7
FLYWHEEL ROTOR ASS’Y ...........................................................................5-8
EXPLODED DIAGRAM ............................................................................5-8
REMOVAL AND INSTALLATION CHART................................................5-8
SERVICE POINTS.....................................................................................5-9
Flywheel rotor ass’y removal ...........................................................5-9
POWER UNIT...............................................................................................5-10
EXPLODED DIAGRAM ..........................................................................5-10
REMOVAL AND INSTALLATION CHART..............................................5-10
CYLINDER HEAD AND PUSH ROD............................................................5-11
EXPLODED DIAGRAM ..........................................................................5-11
REMOVAL AND INSTALLATION CHART..............................................5-11
SERVICE POINTS...................................................................................5-13
Cylinder head removal....................................................................5-13
Cylinder head inspection ................................................................5-13
Push rod inspection.........................................................................5-14
Push rod installation .......................................................................5-14
ROCKER ARM AND VALVES......................................................................5-15
EXPLODED DIAGRAM ..........................................................................5-15
REMOVAL AND INSTALLATION CHART..............................................5-15
SERVICE POINTS...................................................................................5-16
Valve inspection...............................................................................5-16
Valve spring inspection...................................................................5-17
Rocker arm inspection ....................................................................5-17
Push rod guide inspection ..............................................................5-18