•
Remove the pin (2)
•
After having removed the piston, pro-
ceed with the removal of the top ring
(3), the central ring (4) and the oil scra-
per ring (5)
Checking the cylinder
•
All seal surfaces must be clean and flat.
•
Check cylinder internal surface for signs of abrasion and scratches. Also check the seal
surfaces for damages.
CAUTION
IF THE GROOVES ON THE CYLINDER LINER ARE EVIDENT, REPLACE THE CYLINDER AND
THE PISTON.
Checking the piston
•
Measure the piston skirt diameter (1)
with a micrometer (2=10mm - 0.39in
from the piston lower border).
•
Replace the cylinder, the piston and
the piston ring all together if not com-
plying with specifications.
Characteristic
Minimum piston diameter
61 +/- 0.05 mm (2.40 +/- 0.0020 in)
Maximum piston diameter
61.98 / 61.97 mm (2.44 / 2.43 in)
ETX - STX 150 Engine
ENG - 105
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