On 25 Sep 2005 19:26:01 -0700, "nrp" wrote:

snip
One minor additional thing - Occasionally also clean the sparkplug
helicoil threads in the cylinder. Somewhere (a surplus tore as I
recall) I found some small wire brushes about 3/8 inch dia that could
be chucked into an electric drill and slowly rotated in the threaded
hole to clean the crud out of the threads.

Champion useta sell a thread chaser for this purpose. Looked a lot
like a spark plug, had cut-outs in the threads to catch the crud. SOP
was stick a finger full of grease into the cut-outs to help it
"stick".

TC