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Yamaha F40B - Disassembling the Cylinder Block

Yamaha F40B
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67C3K11 5-42
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Disassembling the cylinder block
1. Remove the thermostat cover bolts and
exhaust cover bolts in the sequence
shown, and then remove the thermostat
cover 1, thermostat, and exhaust cover
2.
2. Remove the oil filter 3 using a 64 mm
(2.5 in) oil filter wrench.
3. Remove the crankcase bolts in the
sequence shown, and then remove the
crankcase 4.
4. Remove the connecting rod caps 5 and
bearings 6, and then remove the con-
necting rods, bearings, and piston
assemblies.
5. Remove the crankshaft, main bearings,
and oil seals.
NOTE:
Be sure to keep the main bearings in the
order as they were removed.
6. Remove the piston pin clips 7 and pis-
ton pin 8, and then remove the piston
9.
NOTE:
To avoid interchanging the pistons, connect-
ing rods, and connecting rod caps, mark
each with an identification number a of the
corresponding cylinder and be sure to keep
them in the order as they were removed.
7. Remove the piston rings.
Oil filter wrench: 90890-01426
S67C5119
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7
4
5
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3
2
1
0
S67C5121
3
S67C5122
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2
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90
AB
CD
EF
4
S67C5124
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6
S67C5125
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9
a
7
a
Cylinder block

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