Mercury 35/40HP 2 Cylinder Outboards Service Manual PN 90-42794--1, Page 75Get this manual
Powerhead Component Removal General Note
Powerhead "Disassembly" and "Reassembly" instructions are printed in sequence that should be followed to assure best results when removing or replacing powerhead componentsIf complete disassembly is not necessary, start reassembly at point where disassembly was stopped(Refer to "Table of Contents", preceding Usually, complete disassembly of powerhead will be requiredIf major powerhead repairs are to be performedremove power head from drive shaft housingRemoval of powerhead is not required for minor repairs on components, such as ignition system, carburetors, etc