Honda BF20A-BF25A, BF25D-BF30D Outboard Motors Shop Manual., Page 126Get this manual
HONDA BFSOA25A
3) Remove the connecting rod and measure the plastigauge
STANDARD
0.01 0.028 10.0004-0.OOllin)
SERVICE LIMIT
0.4 (0.01in)
CONNECTING ROD BIG END AXIAL CLEARANCE
Measure the clearances with feeler gauge
STANDARD
0.12 0.27 mrn (0.005-0.01 in) 1