I have a Sailfish 176 with a 60 gallon in-boat tank. Apparently I have an air leak somewhere. I can pump the primer bulb hard start the engine - but then the bulb goes soft. I also hear a sucking sound when I pump gas with the motor off.<br />The motor does run but seems to idle better when running from a 6.5 gallon outboard tank that I used for testing as opposed to the in-boat tank.<br /><br />One thing that makes me think that there is a leak is that I filled the outboard tank with the primer bulb connected to the separator. I submerged the recieving end of the hose in gas. When I squeezed the bulb I saw little air bubbles. I assumed that I would be able to create a siphon but I needed to squeeze the bulb constantly to fill the thank - and there were bubbles with each squeeze.<br /><br />The boat has a Suzuki DT100, connected to a primer bulb, then to a fuel/water separator - then to the tank. I tested everything from the separator out - and it seems to hold pressure. <br /><br />I'm thinking of replacing the last fuel line from the separator to the tank and removing the check valve there to take it out of the equation.<br /><br />Since the primer bulb has a built-in check valve, to I need to replace the one at the fuel tank?<br /><br />Exactly what purpose does this at the tank check valve serve and what are the ramifications of removing it?
