Will JB Weld Repair a Cracked Engine Block?

I went to get my boat ready for the summer and discover that my engine block was cracked. I looked online to find the cost of a new block to be way out of my range so I decided to see if I could repair the cracked block. Cast iron is very sensitive to heat and I do not have the skills to weld cast iron. So I decided to see if JB Weld would repair the block or not. To discover if it worked or not, watch the video below.

There you have it.... What are your thoughts?