Fuel fumes

[Chewie]

I have a 3.0 mercruiser on a mariah sx, it seems to be expelling fuel fumes when on the water any ideas why

 

[guyjg]

Is there a fuel sheen on the water? Fuel leaking on the engine? Fuel or vent hose ruptured?

 

[Chewie]

Will check the hoses this weekend there doesnt appear to be any fuel loss