OER Parts offers a wide selection of Starter Parts and Hardware for your 1990 Mercury Topaz. OER Parts offers 1990 Mercury Topaz Starter Motor Brace, 1990 Mercury Topaz Starter Mounting Bolts, 1990 Mercury Topaz Starter Motor Heat Shield, 1990 Mercury Topaz Starter Solenoid, 1990 Mercury Topaz Starter Rebuild Kit, 1990 Mercury Topaz Starter Shim Set, 1990 Mercury Topaz Starter Heat Shield Set, and 1990 Mercury Topaz Floor Mounted Starter Switch.