Minimal tools needed. About 20 minutes. (Including cleanup)

As of August 2008, this bulb was $14.00 USD at the local Mercury dealership.

Remove the nut and then pry along the edges with a flat screw driver. Start from the front and go towards the back from the back slowly from each side.

Disconnect the power cable to the clock. Use the flat blade screwdriver to release it before pulling it out. The white plastic cover simply pulls off incase you want to take it off.

Use a socket to remove the bulb. (You could do this with your hands if you have small and strong fingers.) Tip: Put a small piece of masking tape inside the socket and it will provide just enough friction to keep the new bulb in the socket without falling out while you are trying to install it.