Assembling The Cylinder Block - Yamaha F150B Service Manual

POWR

Assembling the cylinder block

1. Install the collar a by striking it with a
plastic hammer.
a
2. Install the oil rings b, 2nd ring c, and
top ring d onto each pistons.
3. Make sure that the "RN" mark a of the
2nd ring c and "R" mark b of the top
ring d are facing upward.
TIP:
After installing the piston rings, check that
they move smoothly.
4. Offset the piston ring end gaps as
shown. NOTICE: Do not scratch the
pistons or break the piston rings.
#5
45° 45°
#2
#3
#5
#1,#4
5. Install the upper
connecting rod e and the lower bearing
into the connecting rod cap f.
7-61
Power unit
a
a
b
#4
c
#3
#1
#2
E
b
bearing into
f
TIP:
Install the connecting rod bearings in their
original positions.
6. Install the upper main bearings g and
the thrust bearing h into the cylinder
block i.
TIP:
Install the main bearings in their original posi-
tions.
7. Set the crankshaft j and oil seal k into
d
the cylinder block.
the
e
g
h
g
k
j
i