TOHATSU 2 Stroke Cylinder Series, Service Manual

Page: 111 / 268

POWERHEAD
4-31
1-/ 2-Cylinder
If any dimension is not within specification, replace the crankshaft
assembly.
6. Check for smooth operation of aIl crankshaft and
connecting rod bearings. Upper and lower main bearings
and small end connecting rod bearings are serviceable. Wear of
other parts requires replacement of the crankshaft assembly. lf
lower main bearing
(2) is defective, proceed to remove the
components as follows:
• Remove snap ring (3) .
• Install a universal bearing puller with bearing retainer plate and
remove lower main bearing (2) from the crankshaft.
• See powerhead Assembly procedure for installation.
NOTE
DO NOT fully disassemble the crankshaft assembly
unless further wear or damage is suspect.
Model
Dimension 1
in [mm]
Dimension 2
in [mm]
Dimension 3
in [mm]
2.5 / 3.5
1.417 ± 0.002
[36 ± 0.05]
N/A N/A
5
1.975 ± 0.002
[40 ± 0.05]
N/A N/A
8 / 9.8
1.654 ± 0.002
[42 ± 0.05]
0.984 ± 0.002
[25 ± 0.05]
4.292
[109]
9.9 / 15 / 18
1.890 ± 0.004
[48 ± 0.1]
1.299 ± 0.002
[33 ± 0.05]
5.079
[129]
25 / 30
1.496 ± 0.002
[38 ± 0.05]
5.590
[142]
40
1.591 ± 0.002
[40.4 ± 0.05]
5.733
[145.6]
2.047
+ 0
– 0.001
[52
+ 0
]
– 0.02
2.071
+ 0
– 0.002
[52.6
+ 0
]
– 0.05
27
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