Parameter Specification
Connecting rod crankshaft pin diameter 29.000–29.013 mm (1.1417–1.1422 in.)
Connecting rod crankshaft pin diameter (service limit) 28.038 mm (1.1432 in.)
Connecting rod side clearance 0.1–0.25 mm (0.004–0.01 in.)
Connecting rod side clearance (service limit) 0.6 mm (0.0236 in.)
Piston Specifications
Parameter Specification
Piston skirt standard diameter 60.96 mm (2.40 in.)
Piston skirt standard diameter (service limit) 60.90 mm (2.3976 in.)
Piston to bore clearance 0.020–0.055 mm (0.0008–0.0022 in.)
Wrist pin diameter 15.996–16.000 mm (0.6298–0.6299 in.)
Wrist pin diameter (service limit) 15.993 mm (0.6296 in.)
Top ring side clearance 0.03–0.08 mm (0.0012–0.0031 in.)
Top ring side clearance (service limit) 0.1 mm (0.004 in.)
Second ring side clearance 0.02–0.06 mm (0.0008–0.0024 in.)
Second ring side clearance (service limit) 0.09 mm (0.0035 in.)
Oil ring side clearance 0.03–0.13 mm (0.0012–0.0051 in.)
Oil ring side clearance (service limit) 0.15 mm (0.0059 in.)
Top ring end gap 0.15–0.30 mm (0.0059–0.0118 in.)
Top ring end gap (service limit) 0.5 mm (0.02 in.)
Second ring end gap 0.35–0.50 mm (0.0138–0.0197 in.)
Second ring end gap (service limit) 0.7 mm (0.028 in.)
Oil ring end gap 0.2–0.7 mm (0.008–0.028 in.)
Cylinder Block/Crankcase
90-8M0125265 eng NOVEMBER 2017 © 2018 Mercury Marine Page 4A-3
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