Installing The Piston Ring - Yamaha F115A Service Manual

POWR
#4
#3
CRANKSHAFT AND PISTON/
CONNECTING ROD ASSEMBLY
45˚
45˚
#2
#3
U P
#1 #4
#2
#1
5610
Connecting rod bearing selection table
(20 ˚C (68 ˚F))
Measurement
value using a
®
Plastigauge (mm)
0.025 - 0.031
0.032 - 0.039
0.040 - 0.046
0.047 - 0.052
0.053 - 0.058
0.059 - 0.063
CAUTION:
The (*) mark indicates that the color of the
upper and lower bearings are different.
(9) If the measurement value is more than
the maximum value (0.071 mm),
replace the crankshaft, connecting rod,
or both.

INSTALLING THE PISTON RING

CAUTION:
• Do not scratch the piston or break the pis-
ton rings.
• After installing the piston rings, check
that they move smoothly.
Install:
• Oil ring (#3 and #4)
• 2nd ring (#2)
• Top ring (#1)
NOTE:
• Offset the piston-ring end gaps as shown.
• Piston rings should be replaced as a set.
5-46
Upper bearing Lower bearing
Yellow Yellow
Yellow Green*
Green Green
Green Blue*
Blue Blue
Blue Red*
E
5