4 - 32
ENG
CYLINDER AND PISTON
●If out of specification, replace the piston.
*****************************************************
Piston pin-to-piston clearance:
0.004 ~ 0.024 mm
(0.00016 ~ 0.00094 in)
<Limit>: 0.074 mm (0.0029 in)
INSTALLING THE PISTON
1.Install:
●Piston rings
(onto the piston)
N
OTE:
●Be sure to install the piston rings so that the
manufacturer’s marks or numbers are
located on the upper side of the rings.
●Lubricate the piston and piston rings liberally
with engine oil.
2.Position:
●Top ring
●2nd ring
●Oil ring
Offset the piston ring end gaps as shown.
aTop ring end
bOil ring end (upper)
cOil ring end (lower)
d2nd ring end
3.Install:
●Piston 1
●Piston pin 2
●Piston pin clips 3
N
OTE:
●Apply engine oil onto the piston pin, piston
ring and piston.
●Be sure that the arrow mark a on the piston
points to the exhaust side of the engine.
●Before installing the piston pin clips, cover
the crankcase with a clean rag to prevent the
piston pin clips from falling into the
crankcase.
New