Legal Question in Business Law in Kentucky

I guess the question here is whether the problem is the motor or the mechanic. Two used motors later and you still don't have a working car.

First, the mechanic should have returned the first motor to the junk yard when the second motor arrived, since it was an exchange. You paid for one motor, not two, and currently two is technically what you have. You'll need to get that motor back to the junk yard to get square with the junk yard, then you can address a refund or another exchange with the motor that is currently installed in your car.

Then you'll need to figure out if the problem is the motor or the mechanic. Take the vehicle to another mechanic and get a second opinion. You have a 90 day warranty on parts, but not on service. With the labor involved in continuously installing motors... you probably could have purchased a new engine by the time it's all said and done. If the problem is the motor, well, there isn't much to be done. You can get another used motor from the junk yard, but with two duds so far, the odds sure aren't in your favor. However, if the problem was with the mechanic installing the motor wrong and that caused the damage, then you would have room to argue that the mechanic should install another motor without any further charges.