FW coolant side drain Westerbeke 8KW

[Keith]

I hate to admit it, but it's been so long since I changed the FW coolant in my Westerbeke, I can't remember how I drained it. There is a petcock on the underside of the heat exchanger, but that's for raw water. Is there a drain, or do I have to remove one of the coolant hoses to the heat exchanger? This is a 1986 model that came with my Krogen.

 

[Forkliftt]

May or may not help- but I just drained the coolant from my NL to replace the water pump and it had a "T" handle for a valve on the side of the block with a clear tube attached to drain out of.