Yamaha F40B - Removing the Cylinder Head; Disassembling the Cylinder Head

POWR
Power unit
5-29 67C3K11
Removing the cylinder head
1. Remove the cylinder head cover.
2. Remove the cylinder head bolts in the
sequence shown.
CAUTION:
Do not scratch or damage the mating sur-
faces of the cylinder head and cylinder
block.
Disassembling the cylinder head
1. Remove the oil pump assembly 1.
2. Remove the bolts 2, retainers 3,
springs 4, rocker arm shaft 5, and
rocker arms 6.
NOTE:
• Loosen the locknuts and adjusting screws
to ease the tension on the rocker arm shaft
5 before removing it.
• Be sure to keep the parts in the order as
they were removed.
3. Remove the bolt 7, camshaft 8, and oil
seal 9.
4. Remove the intake and exhaust valves.
NOTE:
Be sure to keep the valves, springs, and
other parts in the same order as removed.
S67C5068
2
1
4
3
56
78
90
AB
S67C5069
1
S67C5070
6
2
3
5
2
2
6
2
3
4
4
3
3
6
Valve spring compressor 0:
90890-04019
Valve spring compressor
attachment A: 90890-06320
S67C5071
8
9
7
S67C5174
0
A