1987-1993 Mercury Mariner Outboards 70/75/80/90/100/115HP 3 and 4-cylinder Factory Service Manual, Page 378Get this manual
7Remove nuts securing key switch and trim switch to tiller handle bracketRemove clip securing lanyard stop switch and remove switch from bracket 9Remove electrical panel access coverDisconnect switch harness from engine harness plugDisconnect PURPLE bullet connector
a Nuts Key Switch Trim Switch Clip Lanyard Stop Switch