Garbage disposal causes a loud clunk when starting or stopping

Safety first: Disconnect power before tightening hardware.

• Tighten mounting screws: Under the sink, tighten the three screws on the Project Source mounting assembly evenly.
• Check discharge support: Ensure the drain piping is properly supported and not acting as a lever on the disposal.
• Reinforce sink: If the sink flexes, consider adding bracing or sound-deadening pads.

If clunking persists and appears to come from inside the unit, internal mounts may be worn; replacement is advised.