Honda BF8, BF9.9 and BF10 Outboard Motors Shop Manual., Page 186Get this manual
bDISASSEMBLY 1) Remove the piston pin clip using long nose pliersl and remove the piston pin and connecting rod from the piston2) Spread each piston ring and remove it by lifting it up at point just opposite the gap-
Take care not to damage the piston ring by spreading the ends too farBe careful not to damage the piston during the piston ring removal