Solved the problem. I put liquid wrench on the nut, grabbed the saw with a rag,
put a wrench on the nut and twisted. Still couldn't get it off, so I took it to
the hardware store, and asked the guy who sold it to me. He did the same thing
but got out a hammer and whacked the wrench a few times. Off it came. I've now
oiled the arbor threads.

--
Wayne T. Watson (Watson Adventures, Prop., Nevada City, CA)
(121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
Obz Site: 39° 15' 7" N, 121° 2' 32" W, 2700 feet

"The obscure we see eventually. The completely obvious,
it seems, takes longer." -- Edward R. Murrow

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