[darkpuppet]

oh, there's one last-ditch thing that should fix it without the need to drill out the cylinder.

Take 5 gallons of gasoline, and slowly power it into the keyhole.. Don't worry, it'll all fit, and will help lubricate for the next step.

Then have a friend light the area by the keyhole with a match or lighter to gain a better view of the problem.

Evacuate to 20ft away, and enjoy the show.