Honda BF50 (5HP) BF5A Outboard Motors Shop Manual., Page 54Get this manual
BF50eBF5A 3) Remove the connecting rod and measure the plastigaugeSTANDARD SERVICE LIMIT
0.040-0.063 mm (0.0016-0.0025 in)
0.08 mm (0.003 in)
4) If the clearance exceeds the service limit, replace the connetting rod and recheck the clearance
CONNECTING ROD BIG END AXIAL CLEARANCE
STANDARD
SERVICE LIMIT
0.1-0.7 mm (0.004-0.028 in)
1.0 mm (0.039 in)