Mercury 35/40HP 2 Cylinder Outboards Service Manual PN 90-42794--1, Page 379Get this manual
Diaphragm Plate Installation 1Install diaphragm plate (a)Carefully seal diaphragm peripheral rib (b) into main body groove (c)
3Install main body cover (a) on main body (b)
NOTE: Make sure to install washers in positions shown4Install bolts and washers (a) with an 8mm wrench Torque bolts to 30 lbin(3.30 Nm) using the correct bolt tightening pattern (see inset)