Pass-through fitting assembly for outboard engine assembly

An outboard engine assembly for a watercraft, comprising:

• an engine unit including:
• an engine unit housing defining an engine unit housing wall;
• and
• an internal combustion engine disposed in the engine unit housing;
• a gearcase connected to the engine unit housing;
• an exhaust system including:
• an exhaust housing disposed in the engine unit housing, the exhaust housing defining an exhaust passage fluidly communicating with the internal combustion engine,
• the exhaust passage having an exhaust outlet, the exhaust passage being configured for supplying exhaust gases from the internal combustion engine to an exterior of the outboard engine assembly via the exhaust outlet,
• the exhaust housing having an exhaust housing wall,
• the exhaust housing wall defining a first aperture,
• the exhaust housing wall having a first threaded portion,
• the engine unit housing wall defining a second aperture,
• the engine unit housing wall defining an abutment surface around the second aperture;
• the exhaust housing wall and the engine unit housing wall defining an intermediate zone therebetween;
• and
• a pass-through fitting extending between the exhaust housing wall and the engine unit housing wall, the pass-through fitting comprising:
• a body having a first end and a second end, the body defining a body passage extending axially from the first end to the second end, the body passage fluidly communicating the exhaust passage with the exterior of the outboard engine assembly via the first aperture and the second aperture, the body passage being fluidly isolated from the intermediate zone;
• and
• a flange extending radially outwardly from the body, the flange being disposed axially between the first end and the second end,
• the body having a second threaded portion disposed axially between the first end and the flange, the second threaded portion engaging the first threaded portion;
• a first seal abutting and disposed radially between the body and the exhaust housing wall for preventing fluid communication between the exhaust passage and the intermediate zone via the first aperture, the first seal being disposed axially between the first end and the flange;
• and
• a second seal abutting and disposed axially between the flange and the abutment surface for preventing fluid communication between the exterior of the outboard engine assembly and the intermediate zone via the second aperture;
• and
• a propulsion device operatively connected to the engine.