Yamaha EF2400iS Service Manual page 70

PISTON, CONNECTING ROD, CRANKSHAFT AND
a
CRANKCASE
2. Measure:
9 Piston clearance
Piston clearance =
Cylinder inside diameter -
Piston skirt diameter
3. Measure:
9 Piston pin hole inside diameter a
4. Measure:
9 Piston pin diameter a
a
5. Inspect:
9 Check the piston pin enters smoothly
3-37
Out of specifications → Rebore or
replace cylinder and replace piston and
piston rings.
Piston clearance:
0.015 ~ 0.040 mm
(0.0006 ~ 0.00157 in)
Out of specifications → Replace.
Piston pin hole inside diameter:
16.002 ~ 16.013 mm
(0.6300 ~ 0.6304 in)
Wear limit:
16.020 mm (0.6307 in)
Out of specifications → Replace.
Piston pin diameter:
15.995 ~ 16.000 mm
(0.6297 ~ 0.6299 in)
Wear limit:
15.950 mm (0.6280 in)
into the piston pin hole.
If the piston pin fits tightly into the pis-
ton, check the piston pin hole. If there is
any protrusion, use a knife or scraper to
gently remove it so that piston pin can
be pushed in gently with your fingers.
ENG