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ENG
ENGINE ASSEMBLY AND ADJUSTMENT
CYLINDER HEAD ASSEMBLY, CYLINDER
AND PISTON
1.Install:
● Piston 1
● Piston pin 2
● Piston pin clips 3
NOTE:
● The arrow 4 on the piston must point to
the front of the engine.
● Before installing the piston pin clip, cover
the crankcase with a clean towel or rag so
you will not accidentally drop the pin clip
and material into the crankcase.
WARNING
Always use a new piston pin clip.
2.Apply:
● 4-stroke engine oil
To the piston pin, piston ring grooves and
piston skirt areas.
3.Install:
● Gasket 1 (cylinder)
● Dowel pins 2
● O-ring 3
● O-ring 4 (to cylinder)
WARNING
Always use new gasket and O-ring.
4.Offset the piston ring end gaps as shown.
NOTE:
● Be sure to check the manufacturer's
marks or numbers stamped on the rings
are on the top side of the rings.
● Before installing the cylinder, apply a lib-
eral coating of 4-stroke engine oil to the
piston rings.
1 Top ring
2 Oil ring (lower rail)
3 2nd ring
4 Oil ring (upper rail)
4