Mercury 35/40HP 2 Cylinder Outboards Service Manual PN 90-42794--1, Page 23Get this manual
IGNITION COIL REMOVAL and INSTALLATION IMPORTANT: Metal pigtails (a) must ground against cylinder block when coils are installed SWITCH BOX REMOVAL and INSTALLATION
1Remove and install switch box, as shown 2Connect switch box wires following wiring diagram Section 2, Part DDesign I
1Remove and replace coils as shown in photo2Form water tight seal between coil tower and spark plug lead using Quicksilver Insulating Compound (92-41669-1) 3Connect wires to proper terminals following wiring diagramsSection 2, Part D