Note the cutouts going out the port sides of the boat just above the cockpit floor.  Exhaust cutout is forward of scupper cutout.  Both scuppers and both exhaust pipes went out of the stern, through the transom, before Tony built the fuel tanks across the stern.  Originally, the exhaust pipes were below the waterline and able to freeze during the winter. I raised the exhaust above the waterline so the motors and exhaust would automatically drain each time I shut the motors off.  This arrangement allows winter use for sea duck hunting without freeze ups. Each motor has block heaters, the generator has a glow plug, plus the bilge is heated.

Rear deck taking shape showing collars boards and two fill pipe rough-ins showing thru. Note starboard exhaust pipe thru the side with scupper rearward.

Tony cutting exhaust pipe.

Tony tring to eliminate one of Lea's concerns about her not having enough room to lay on the stern seat to sunbathe, read a book and drink a beer.

Starboard exhaust and scupper rough-in.