Heat will do what you suggested. But it will ruin the paint and it
will soften the aluminum making it more likely for the threads to come
out with the bolt. I'd use it as a last resort.

wingspan wrote:
Thanks for the info. I've ordered a can of Kroil.

Wayne.B wrote:
On 1 Jul 2006 16:26:45 -0700, "wingspan"
wrote:

I did
get it up a couple of threads and tried to get some Liquid Wrench to
run down, but I'm afraid it's (a) galled or (b) cross-threaded. What I
REALLY don't want to do is break it off in the lower unit casting. Any
suggestions for getting it out intact?

Kroil and PB Blaster are both better penetrating oils than Liquid
Wrench. Apply liberally, tap lightly with a hammer, turn back and
forth, repeat...