Shibaura ST330, Workshop Manual

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3) Cylinder block
Inspection and service
(1) Check for crack, damage and distortion on the top of the
block in the same way as in the cylinder head.
(2) Measurement of cylinder bore
➀
There should be no scratch, rust, corrosion, etc. on the
cylinder bore when checked visually.
➁ Measure the cylinder bore at the top, center and
bottom respectively in the crankshaft direction (A) and
the direction at right angle to it (B). If the repair value
is exceeded, replace engine long block.
Distortion on cylinder block top surface (mm)
Standard assembling value Repair value
Less than 0.05 More than 0.12
119Y
(Unit: mm)
Model Standard assembling value Repair value
N843 ∅ 84 － ∅ 84.019 ∅ 84.2
Replace with long block assembly