Cylinder Block/Crankcase Specifications; Cooling System Specifications - Mercury 25 EFI Service Manual

Master Specifications

Cylinder Block/Crankcase Specifications

Number of cylinders
Displacement
Standard bore
Standard bore (service limit)
Cylinder bore maximum taper (service limit)
Cylinder bore maximum out of round (service limit)
Crankshaft main bearing journal
Crankshaft main bearing journal (service limit)
Crankshaft pin journal
Crankshaft pin journal (service limit)
Crankshaft end play
Crankshaft runout
Crankshaft runout (service limit)
Crankshaft main bearing oil clearance
Crankshaft main bearing oil clearance (service limit)
Crankshaft pin bearing oil clearance
Crankshaft pin bearing oil clearance (service limit)
Connecting rod wrist pin bore diameter
Connecting rod wrist pin bore diameter (service limit)
Connecting rod crankshaft pin diameter
Connecting rod crankshaft pin diameter (service limit)
Connecting rod side clearance
Connecting rod side clearance (service limit)

Cooling System Specifications

Cooling system
Thermostat
Start to open temperature
Full open temperature
Valve lift
Page 1A-4
Cylinder Block/Crankcase Specifications
Cooling System Specifications
© 2016 Mercury Marine
3
526 cc (32.09 cu. in.)
61.0 mm (2.4016 in.)
61.06 mm (2.4039 in.)
0.08 mm (0.0032 in.)
0.06 mm (0.0024 in.)
35.99 mm (1.4169 in.)
35.97 mm (1.4161 in.) or less
29.98 mm (1.1803 in.)
29.95 mm (1.179 in.) or less
0.05–0.15 mm (0.002–0.006 in.)
Less than 0.05 mm (0.002 in.)
0.05 mm (0.002 in.) or more
0.012–0.044 mm (0.0005–0.0017 in.)
0.06 mm (0.002 in.) or more
0.010–0.036 mm (0.00037–0.00142 in.)
0.060 mm (0.002 in.) or more
16.01–16.04 mm (0.630–0.631 in.)
16.04 mm (0.631 in.) or more
29.995–30.021 mm (1.1809–1.1819 in.)
30.023 mm (1.182 in.) or more
0.1–0.25 mm (0.004–0.01 in.)
0.6 mm (0.0236 in.)
Water cooled ‑ thermostat control
60° ± 1.5 °C (140° ± 3 °F)
75° ± 1.5 °C (167° ± 3 °F)
3 mm (0.12 in.)
90-8M0105568 eng MARCH 2016