Gasoline smell 2018 R-27 outboard

[Avidfisherman]

Well I did it, Overfilled my tug a few months ago, a few days later I had a gasoline Oder just in the cockpit after it was closed up for a few days, bad enough to set off my propane alarm ? Smell would dissipate rather rapidly with door and windows open and not noticeable when using, No smell of gas in the lazarette or in two other side storage compartments, checked both main fuel line and vent line, no leaks, no leaks on top of tank, trying to locate the charcoal carbon canister,if it has one ? Anyone else ever experienced this ? It’s now in my shop for the winter and decided to have a look today and when i opened the cabin door propane alarm was on and smelled like gas. No where else but the cabin?? Thanks Rob