Originally Posted by Wanderlust
Actually, from the photo
it looks like the top thread is left hand and the lower one is right hand, which would align with Badsanta's recollection.
Thank you all for excellent suggestions and information. I agree with Wanderlust--from the photo
it looks like the top thread is left hand, so I was actually tightening the elbow
when I was trying to take it off. Seems like the universal advice is to remove the whole assembly, put it in a vise, and liberally apply heat and brute force. However, I think I'll defer it to the end of the sailing season.