Honda BF9.9A-BF15A Outboard Motors Shop Manual., Page 78Get this manual
HONDA BF9.9A-BF1 BA
BALANCER WEIGHT, BREATHER FILTER
BALANCER WEIGHT REASSEMBLY: Do not confuse the balancer weight and BInstall the balancer weight and with their punch marks aligned with the punch marks on the crankshaft
[I1 -1, PUNCH MARKS