Mercury 4W7Z-18124-BA Shock Absorber Assembly

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Locate the upper retaining nut on top of the frame, and if necessary, hold the piston rod with a wrench or locking pliers while loosening the nut. Remove the upper nut, washer, and insulator from the stud on the upper side of the frame.

During installation, ensure all air is expelled from a new shock absorber (for 2002 and earlier models), install all bushings and grommets in the order of removal, and use 5116-18 locknuts on the self-tapping bolts if the threads in the lower control arm are stripped or damaged. Tighten all fasteners to the specified torque, with locknuts torqued to the same specification as the bolts.

Have an assistant grasp the lower edge of the tire and move the wheel in and out while you look for movement at the steering knuckle-to-control arm ball joint. If any movement is detected, the suspension ball joint(s) must be replaced.

For 2003 and later models, remove the three shock absorber upper mounting nuts, the brake caliper, and the brake disc. Additionally, remove the upper and lower stabilizer bar links. Remove the upper balljoint nut and separate the control arm from the steering knuckle. Finally, remove the lower mounting bolt and the shock absorber/coil spring assembly from the front end of the vehicle.

Start by raising the rear of the vehicle and securely supporting it on jackstands.

Check the shock absorbers to ensure they are securely mounted and undamaged. Inspect the upper mounts for damage and wear. If damage or wear is observed, replace the shock absorbers as a set (front or rear).