Last fishing excursion my outboard starting to act up and not pump constant fuel. So I started the whole process of elimination of checking the primer bulb and hoses. Those were aging so I replaced them even though they were not the main problem. I kept looking and found this little guy hiding under one of the carburetors. The hose has a slit about 1" long in it. Simple fix luckily, but one of those things we deal with owning a boat. I'm in the process of replacing all the fuel line in the motor that shows any wear so this doesnt happen on a big lake.