SELVA MARINE Blue Whale 250 EFI, Service Manual

Page: 180 / 377

POWR
Power unit
5-67
6P23H11
Assembling the power unit
NOTE:
See the exploded diagram (5-55).
1. Assemble the piston
1
, connecting rod
2
, piston pin
3
, and new piston pin clips
4
.
NOTE:
• Face the mark
a
on the connecting rod in
the same direction as the “ UP ” mark
b
on
the piston.
• Always use new piston pin clips, and do not
allow the piston pin clip end to align with the
piston pin slot
c
.
2. Install the oil rings
5
, second ring
6
,
and top ring
7
to the piston with the “ 2R ”
mark
d
of the second ring and the “ R ”
mark
d
of the top ring facing upward.
3. Offset the piston ring end gaps as
shown.
CAUTION:
Do not scratch the pistons or break the
piston rings.
NOTE:
After installing the piston rings, check that
they move smoothly.
4. Install the upper bearing into the con-
necting rod
2
and the lower bearing into
the connecting rod cap
8
.
NOTE:
• Install the connecting rod bearings in their
original positions.
• Insert the projection
e
of the bearing into
the slots on the connecting rod cap and
connecting rod.
5. Install half of the main bearings
9
into
the cylinder block
0
.
S6P25A70
UP
R
2R
#1,#4
#2
#5
#3
45˚ 45˚
#1
#2
#5
#4
#3
E
d
5
6
7
d