Assembling Piston And Connecting Rod - TOHATSU MFS 60A Service Manual

Power Unit
Connecting rod metal bearing thickness
Parts No.
3KY-00080-0
3KY-00081-0
3KY-00082-0

40) Assembling Piston and Connecting Rod

Install connecting rod 2, piston pin 3, and piston pin clips
1.
4 to piston 1.
• Point "Δ" mark of connecting rod a and "UP"
mark b of piston at the same direction.
• Be sure to use new piston pin clip, and place clip
gap away from piston pin groove c as shown.
• Be sure that individual connecting rod cap is
installed to their original connecting rod.
Put expander 5 (#4) into oil ring groove, and check that ring
2.
ends meets correctly as shown.
While holding expander 5 (#4) gap with thumb, put upper
3.
side rail (#3) into the groove so that the gap is away from
gap of expander 5 (#4) to the left by 90 degrees.
4. In similar way, put lower side rail (#5) into the groove so that
the gap is away from gap of expander 5 (#4) to the right by
90 degrees.
5. Install second ring (#2 taper) and top ring (#1) to piston.
Install the rings so that their side with manufacturer's
identification d (T) faces upward.
6. Install piston ring so that their gaps are away from each
other.
Be careful not to scratch piston surface and damage
rings.
• Install piston rings so that their gaps are
away also from thrust direction of piston and
direction piston pin.
• After installing piston rings, check that they
move smoothly.
5-50
Color Thickness
1.491 to 1.495 mm
Brown
(0.05870 to 0.05886 in)
1.495 to 1.500 mm
Black
(0.05886 to 0.05906 in)
1.500 to 1.505 mm
Blue
(0.05906 to 0.05925 in)
CAUTION
4
3
2
a
d
#5
#4
#3
#2
U P
b
1
4
c
5
5
45°
45°
#2
#3
#4
UP
#5 #1
d
#1
4st 60 2019