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POWR
b
c
CRANKSHAFT AND CYLINDER BODY
a
3. Measure:
•
Piston diameter
(use an outside micrometer)
Out of specification → Replace.
Outside micrometer
90890-03008
Measuring
point "H"
10.0 mm
S S S S t t t t a a a a nd
nda a a a r r r r d d d d
nd
nd
(0.3937 in)
O O O O ve
ve
ver r r r s s s s i i i i z z z z e e e e p p p p i i i i s s s s t t t t on d
ve
on di i i i a a a a m m m m e e e e t t t t e e e e r r r r : : : :
on d
on d
1 1 1 1 : : : : 72
72. . . . 2 2 2 2 5 5 5 5 mm
mm ( ( ( ( 2 2 2 2 . . . . 84
72
72
mm
mm
2 2 2 2 : : : : 72
72. . . . 5 5 5 5 0 0 0 0 mm
72
72
mm
mm ( ( ( ( 2 2 2 2 . . . . 85
mm
NOTE:
When measuring the piston diameter, posi-
tion the micrometer in relation to the piston
pin hole as shown.
CALCULATING THE
PISTON-TO-CYLINDER CLEARANCE
Calculate:
•
Piston-to-cylinder clearance.
Out of specification → Replace the
piston and piston rings, the cylinder
or both.
Piston-to-
cylinder
=
clearance
Piston-to-cylinder clearance
0.060 – 0.065 mm
(0.0024 – 0.0026 in)
5-33
Piston diameter
71.94 – 71.96 mm
(2.8323 – 2.8331 in)
844 4 4 4 5 5 5 5 i i i i n n n n ) ) ) )
84
84
854 4 4 4 3 3 3 3 i i i i n n n n ) ) ) )
85
85
Cylinder
bore
–
diameter
diameter
E
Piston
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