Here is the part you need.
Mercury Cougar A/C Compressor By Pass Pulley Dorman
The part is 34.00 dollars. I can't imagine labor would be more than an hour.
Let me know if this helps. Also, contact your mechanic and tell him you are going to purchase a bypass pulley and you need him to install it.
By doing it this way, you can use the correct belt and it will eliminate your problem. It just takes the place of the compressor.
Friday, August 8th, 2014 AT 8:36 PM