Honda BF8, BF9.9 and BF10 Outboard Motors Shop Manual., Page 197Get this manual

Honda BF8, BF9.9 and BF10 Outboard Motors Shop Manual., Page 197

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1) Check the oil seal of the crankcase cover, replace if damagedRemove the oil seal and discard itInstall new oil
install the oil sealApply grease to the lip of the oil seal
121 26x45x7mm