Honda BF35A-BF45A Outboard Motors Shop Manual., Page 161Get this manual
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25x40x7mmOILSEAL17x26x7mm WATER SEAL REMOVAL: Remove the oil seallwater seal by using the special tool as shownTOOL: Oil seal remover
25 40 OIL SEAL
[6]ATTACHMENT, 37 40 mm 07746- 0