Just to pass on some information. When I bought my very first boat (being a newbie), I asked a friend of mine, who is a marine engineer and also owns a fireplace shop, to check over my morso squirrel. It had a hairline crack and he advised me not to use it and to replace it. When it was removed, it collapsed in pieces apparently. It was only 10yrs old. He said that very few boaters check their fuel burners, and that they should have new fire bricks inside every few years, and should never be used, if they have any cracks and they only have a working life of around 8 yrs. I eventually sold that boat (with new burner) and every boat that I looked to buy after that, if it was over 10yrs old, had cracks on the fuel burners and the sellers had no knowledge of the dangers. I have ended up replacing the burner with each boat I have bought. It's interesting that the BSS are now taking it into consideration from Jan 2013.