Assembling The Cylinder Block - Yamaha F30B 2018 Service Manual

Crankshaft journal bearing selection table at
20 C (68 F)
Crankshaft journal
mark "a"
A
B
A
B
A
B
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Assembling the cylinder block

1. Assemble:
• Piston "1"
• Connecting rod "2"
• Piston pin "3"
• Clip "4" New
TIP:
• Face the protrusions "a" on the connecting
rod "2" in the same direction as the "UP" mark
"b" on the piston crown.
• Make sure that the clip "4" end is not aligned
with the groove "c" in the piston pin boss.
4
c
2
a
2. Install:
Cylinder
Bearing col-
block mark
or "c"
"b"
Yellow
A
Red
B
Pink
C
Green
4
3
4
• Oil ring
• 2nd ring
• Top ring
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Install the oil rings "1", 2nd ring "2", and top
ring "3".
Do not scratch the pistons or break the pis-
ton rings.
TIP:
• Make sure that the "T" mark "a" on the top
ring "3" and 2nd ring "2" are facing up.
• Make sure that the piston rings move
smoothly.
b. Offset the piston ring end gaps.
45° 45°
#5
b
#1
#4
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1
7-60
Cylinder block
1
#5
#4
2
#3
#2
a
#3
a
3
#2
#1