BRP Johnson J25R4SUR - Page 129

127
POWERHEAD
SPECIFICATIONS
7
Item Unit
Data
25 HP
CRANKSHAFT / CONNECTING ROD
Connecting rod
small end inside
diameter
STD mm (in) 18.006 – 18.014 (0.7089 – 0.7092)
Connecting rod
big end oil
clearance
STD mm (in) 0.020 – 0.030 (0.0008 – 0.0012)
Limit mm (in) 0.065 (0.0026)
Connecting rod
big end inside
diameter
STD mm (in) 39.015 – 39.025 (1.5360 – 1.5364)
Crank pin outside
diameter
STD mm (in) 38.990 – 39.000 (1.5350 – 1.5354)
Crank pin out-
side diameter
difference
Limit mm (in) 0.010 (0.0004)
Connecting rod
big end side
clearance
STD mm (in) 0.07 – 0.30 (0.0028 – 0.0118)
Limit mm (in) 1.0 (0.0394)
Connecting rod
big end width
STD mm (in) 21.95 – 22.05 (0.8642 – 0.8681)
Crank pin width STD mm (in) 44.170 – 44.220 (1.7390 – 1.7409)
THERMOSTAT
Thermostat operating
temperature
°C (°F) 58 – 62 (136 – 144)