On Tue, 22 Feb 2005 20:25:48 -0600, Richard J Kinch
wrote:

I just acquired a new 25 HP Tohatsu outboard for my inflatable boat. There
is a port above water on the stem that spits out water and exhaust. Do I
surmise correctly that "through the hub exhaust" doesn't mean that *all*
the exhaust goes through the hub? What is the purpose of the above-water
exhaust port?

I was the lead design engineer for thru-the-hub exhaust systems in the
early '50s. A patent that still returns 6 digit checks every month.