The fuel is most common as weather heats up. It is gassing of the tanks as the fuel permeates the tank, and spreads through your boat.
Your vehicle fuel tank is mounted outside your car, while your boat tank is in your boat. Like putting a gas can in your boat and leaving it. Yes it will vent and smell some.
The warmer weather causes expansion and that expansion causes fumes to spread through your garage out the fuel vents.
The system on a ’94 is a proven set up for decades since 1988 model year and is similar to all others still used.
I know this is not hte answer though it is factual.
There is no reason for any more fuel ventilation from any brand of boat to another in a stored position and giving that is the same confined area.
The systems are the same and only the tank volume would give any boat more fuel fentilation over another one in the same environment. That being space, temperature and conditions.
On boats that are over filled, we also see Plenty of fuel expansion issues this time of year from fuel tanks of boats stored outside. They can leak out the fuel vents, as they always have when it gets hot with temperatures rising during the day. That fuel expands and belches out the fuel vants if hte tanks are packed over to top or top out.
That is why the warning label is on newer boats stating to not “Pack” the fuel tanks!
Hope this helps some to answer your questions.
BCB