Honda BF35A-BF45A Outboard Motors Shop Manual., Page 94Get this manual
23)Remove the four 75 rnrn flange bolts, four 55 rnrn hex, bolts and 35 rnrn hexbolts, and remove the engine from the primary gear case
111 PRIMARY GEAR CASE GASKET
GEAR CASE
8 mm PLAIN WASHER (6)
8 35 mm HEX, BOLT