Bad neutral safety switch?
Weak starter solenoid?
A missed adjusted neutral safety switch, or a faulty one.
Need more info.
Mercury Topaz was created in 1983.
A belt diagram for a 1985 Mercury Topaz can be found in the maintenance manual of the car. Sometimes, there is a sticker on the car with the diagram, and an auto shop might print a copy of the diagram for the person.
picture of the fan relay for 1993 mercury topaz
The 1994 Mercury Topaz has a chain and not a belt.
To instal a neutral switch on the 1991 Topaz, kindly make reference to your users manual.
Clean them and see.
A 1991 mercury topaz has drum brakes on the rear wheels.
picture on how to replace a water pump for mercury topaz
where is the fuel reset swith for a 1989 mercury topaz
Yes, and hopefully nothing else.