Mercury 35/40HP 2 Cylinder Outboards Service Manual PN 90-42794--1, Page 351Get this manual
4Remove main body cover (a) from main body (b) 6Carefully remove diaphragm plate (a)
5Remove clip (a) from shaft (b)
Diaphragm Plate Inspection
1Inspect diaphragm plate for signs of deterioration such as swelling, cracking or discoloration 2Replace diaphragm plate if any of the conditions exist