Mercury Mariner 4, 5 102CC Sail 1990 Outboard Service Shop Manual, Page 157Get this manual
Push Button Stop SwitchExtension Harness Drill 5 8" (16mm) diameter hole at desi red stop switch mounting location and secure switch into mounting hole
Remove and discard rubber plug (a) from bottom cowl
Refer to Wiring DiagramA" and route extension harness (a) thru openi ng (b) in bottom cowl,11 65-H
aStop Switch (16mm) OiaM ounting HoleStop Switch LeadNul (Tightened Securely)