why

[colt454]

I had a new thing happen this weekend when the syrup came off it was a nice med. after it cooled it went to B grade never had this happen before

[Kev]

was there anything in the pan it went into from the draw? old syrup ?
I am by no means an expert, but I also have never seenwhat you discribe either.
Although I did once cook some bad sap and had to clean the pan. Back to making good syrup... then filtered it into the pan we use for bottling. Some moron did not clean that pan out after the off tasting stuff and left a gal in it. So all of the good stuff I put in with it was bad too. I blamed my yellow lab cause she doesn't mind, but we all know it was my fault as I was that moron. LOL

[happy thoughts]

I had a new thing happen this weekend when the syrup came off it was a nice med. after it cooled it went to B grade never had this happen before
I just ran across something that might be relevant while reading the Maine syrup quality control manual. There is something called stack burn that happens when containers of syrup are placed too close together when cooling. Too slow cooling can result in a lowering of grade.

See page 10 of the following

http://www.umext.maine.edu/onlinepubs/PDFpubs/7038.pdf