On Fri, 16 Jan 2009 08:22:40 -0800 (PST), stryped
wrote:

What would be the best way to get it out without damaging anything.
Phillips head is buggered out. I have tried WD 40 andvice grips to no
avail.

This is on a small engine. I tried a propane torch and vice grips too
but did not work. I have aceytlene but was a little afraid I might
damage the cylinder or something?

I bought a bolt extractor from HF. Have not tried that much yet.

If heat and visegrips won't budge it, a bolt-extractor won't either.
If (when) the hard bolt extractor breaks off in the bolt, you then
have a real problem.

My approaches would be:

1) drill a hole in a bit of metal, place that over the screw head,
weld it quickly with TIG, MIG or stick. That'll go so fast it won't
have time to harmfully heat up the cylinder. Then tap on the new
"handle" until it either comes out or breaks off. This often works,
partly because the short-duration intense heat on the bolt tends to
break corrosion and loosen it.

2) If (1) is impractical or doesn't work: drill out the bolt, re-tap
the hole. If you miss the center you may need to drill oversize and
shoot in a helicoil.

I definitely would not screw around with a bolt extractor,
particularly one from HF.