I can get you Jets, but your symbol has me a bit off. Is that supposed to be a .72 or .072?
FAE = Fresh Air Exhaust, it's a pair of pipes (homemade, so you can easily make them) that divert the exhaust down into the water after coming out the back of the boat. This pumps them down instead of straight out unrestricted like normal. The water helps cut down on fumes by disapating the exhaust through water, and while under way makes the exhaust bubbles have to float up before they are exposed. Therefore by the time the bubbles surface you are long gone, and there is no exhaust pumping directly into the air like now.
It's not a bad idea for that diesel set up. Search FAE in here, it's been covered with pics.