TOHATSU BFT250A Service Manual page 452

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CYLINDER BLOCK
CONNECTING ROD BEARING
• When replacing the connecting rod bearing, check
the crankpin code letter and the connecting rod code
number, and select the correct bearing by referring
to the bearing selection table.
• If the code letters and/or numbers are not clear,
clean the areas with a cleaning solvent and check
again. Do not scrub with a stiff wire brush or scraper
to clean.
Check the crankpin code letters and record them.
The crankpin code letters are for the No.1 and the
subsequent number journals when viewed from left
side.
Crankpin: 57.00 mm (2.244 in)
Code
number
F or IIIIII
E or IIIII
D or IIII
C or III
B or II
A or I
Check the connecting rod code numbers [1] and record
them.
The connecting rod code numbers are for the No.1 and
the subsequent number journals when viewed from the
timing belt driven pulley side.
Connecting rod: 60.00 mm (2.362 in)
Code
number
1 or I
2 or II
3 or III
4 or IIII
15-38
Tolerance ranges
–0.024 – –0.020 mm (–0.0009 – –0.0008 in)
–0.020 – –0.016 mm (–0.0008 – –0.0006 in)
–0.016 – –0.012 mm (–0.0006 – –0.0005 in)
–0.012 – –0.008 mm (–0.0005 – –0.0003 in)
–0.008 – –0.004 mm (–0.0003 – –0.0002 in)
–0.004 – ±0.000 mm (–0.0002 – ±0.0000 in)
Tolerance ranges
±0.000 – +0.006 mm (±0.0000 – +0.0002 in)
+0.006 – +0.012 mm (+0.0002 – +0.0005 in)
+0.012 – +0.018 mm (+0.0005 – +0.0007 in)
+0.018 – +0.024 mm (+0.0007 – +0.0009 in)
No. 4 No. 2
No.1 MAIN JOURNAL
(TIMING BELT SIDE)
[1]
No.4
No.2
No.5
No.1
No. 5 No. 3
No.6 MAIN JOURNAL
(OIL PUMP SIDE)
No.6
No.3