I acquired a OMC 90HP v4 Flatback. the problem is that it doesn't come with a VRO pump. So I convert it to a premixed and install a fuel pump. it is working fine. However there is one hose that I don't know where to connect it. on the label it said it is a drain hose. please look at the picture, is it the fuel return hose? this engine is installed in a boston whaler rage 14 which doesn't have a return fuel connect to the tank. where should I install this hose? currently it is connected to a custom bottle I make to see if any fuel come out, but after hours of boating there is nothing coming out of this hose........