Mercury 35/40HP 2 Cylinder Outboards Service Manual PN 90-42794--1, Page 170Get this manual
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9 Torque screw plug to 75 lbin(8.3 Nm) 13 Install pipe plug and tighten securely
a-ring (Design I) Plunger Ball Spring (Small) Spring (Large)Pipe Plug
5C- 14LOWER UNIT