22
d. Remove the connecting rod cap and measure the
plasti-gauge width with the scale printed on the
gauge envelope.
NOTE: Measure the widest part of the
plasti-gauge.
(3) If the oil clearance exceeds the service limit
according to the result of the measurement, replace
the metal.
Reassembly (piston and connecting rod)
(1) Heat the piston to about 100°C with a piston heater or
the like and install it aligning the SHIBAURA mark
in the piston and match mark at Ⓐ of the connecting
rod.
(2) Care should be taken to the figure match mark at Ⓐ
of the connecting rod.
(3) Install the piston ring to the piston facing the stamp at
the end surface of the ring end gap upward.
(4) When the connecting rod or piston and piston pin are
replaced, weight variation among cylinders with the
rod, piston and piston ring installed should be within
10 g.
Models Metal size Metal code No.
Crankshaft pin
outside dia.
Finishing
dimension
(φ)
J843 S.T.D.
198517180 43.964 – 43.975
N843L S.T.D.
198517250 51.964 – 51.975
032X
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